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I am having a WaveFormView on which I want to change the color of it while playing Audio file and as the Audio is paused it should be stopped coloring at that certain point and when resumed it should continue forward with coloring. I am not getting how to do it in my code..
This is the screen shot of my generated waveform. Now when I will click on Play button it should change the color of waveform gradually with red color (from start to end slowly).
Here is my code to draw waveform view.
WaveFormView.class
public class WaveformView extends View {
public interface WaveformListener {
public void waveformFling(float x);
public void waveformDraw();
}
;
// Colors
private Paint mGridPaint;
private Paint mSelectedLinePaint;
private Paint mUnselectedLinePaint;
private Paint mUnselectedBkgndLinePaint;
private Paint mBorderLinePaint;
private Paint mPlaybackLinePaint;
private Paint mTimecodePaint;
private SoundFile mSoundFile;
private int[] mLenByZoomLevel;
private double[][] mValuesByZoomLevel;
private double[] mZoomFactorByZoomLevel;
private int[] mHeightsAtThisZoomLevel;
private int mZoomLevel;
private int mNumZoomLevels;
private int mSampleRate;
private int mSamplesPerFrame;
private int mOffset;
private int mSelectionStart;
private int mSelectionEnd;
private int mPlaybackPos;
private float mDensity;
private float mInitialScaleSpan;
private WaveformListener mListener;
private GestureDetector mGestureDetector;
private ScaleGestureDetector mScaleGestureDetector;
private boolean mInitialized;
Color color;
public WaveformView(Context context, AttributeSet attrs) {
super(context, attrs);
// We don't want keys, the markers get these
setFocusable(false);
mGridPaint = new Paint();
mGridPaint.setAntiAlias(false);
mGridPaint.setColor(
getResources().getColor(R.color.grid_line));
mSelectedLinePaint = new Paint();
mSelectedLinePaint.setAntiAlias(false);
mSelectedLinePaint.setColor(
getResources().getColor(R.color.waveform_selected));
mUnselectedLinePaint = new Paint();
mUnselectedLinePaint.setAntiAlias(false);
mUnselectedLinePaint.setColor(
getResources().getColor(R.color.waveform_unselected));
mUnselectedBkgndLinePaint = new Paint();
mUnselectedBkgndLinePaint.setAntiAlias(false);
mUnselectedBkgndLinePaint.setColor(
getResources().getColor(
R.color.selection_border));
mBorderLinePaint = new Paint();
mBorderLinePaint.setAntiAlias(true);
mBorderLinePaint.setStrokeWidth(1.5f);
mBorderLinePaint.setPathEffect(
new DashPathEffect(new float[]{3.0f, 2.0f}, 0.0f));
mBorderLinePaint.setColor(
getResources().getColor(R.color.selection_border));
mPlaybackLinePaint = new Paint();
mPlaybackLinePaint.setAntiAlias(false);
mPlaybackLinePaint.setColor(
getResources().getColor(R.color.playback_indicator));
mTimecodePaint = new Paint();
mTimecodePaint.setTextSize(12);
mTimecodePaint.setAntiAlias(true);
mTimecodePaint.setColor(
getResources().getColor(R.color.timecode));
mTimecodePaint.setShadowLayer(
2, 1, 1,
getResources().getColor(R.color.timecode_shadow));
mGestureDetector = new GestureDetector(
context,
new GestureDetector.SimpleOnGestureListener() {
public boolean onFling(
MotionEvent e1, MotionEvent e2, float vx, float vy) {
mListener.waveformFling(vx);
return true;
}
});
mSoundFile = null;
mLenByZoomLevel = null;
mValuesByZoomLevel = null;
mHeightsAtThisZoomLevel = null;
mOffset = 0;
mPlaybackPos = -1;
mSelectionStart = 0;
mSelectionEnd = 0;
mDensity = 1.0f;
mInitialized = false;
}
public boolean hasSoundFile() {
return mSoundFile != null;
}
public void setSoundFile(SoundFile soundFile) {
mSoundFile = soundFile;
mSampleRate = mSoundFile.getSampleRate();
mSamplesPerFrame = mSoundFile.getSamplesPerFrame();
computeDoublesForAllZoomLevels();
mHeightsAtThisZoomLevel = null;
}
/**
* Called once when a new sound file is added
*/
private void computeDoublesForAllZoomLevels() {
int numFrames = mSoundFile.getNumFrames();
int[] frameGains = mSoundFile.getFrameGains();
double[] smoothedGains = new double[numFrames];
if (numFrames == 1) {
smoothedGains[0] = frameGains[0];
} else if (numFrames == 2) {
smoothedGains[0] = frameGains[0];
smoothedGains[1] = frameGains[1];
} else if (numFrames > 2) {
smoothedGains[0] = (double)(
(frameGains[0] / 2.0) +
(frameGains[1] / 2.0));
for (int i = 1; i < numFrames - 1; i++) {
smoothedGains[i] = (double)(
(frameGains[i - 1] / 3.0) +
(frameGains[i ] / 3.0) +
(frameGains[i + 1] / 3.0));
}
smoothedGains[numFrames - 1] = (double)(
(frameGains[numFrames - 2] / 2.0) +
(frameGains[numFrames - 1] / 2.0));
}
// Make sure the range is no more than 0 - 255
double maxGain = 1.0;
for (int i = 0; i < numFrames; i++) {
if (smoothedGains[i] > maxGain) {
maxGain = smoothedGains[i];
}
}
double scaleFactor = 1.0;
if (maxGain > 255.0) {
scaleFactor = 255 / maxGain;
}
// Build histogram of 256 bins and figure out the new scaled max
maxGain = 0;
int gainHist[] = new int[256];
for (int i = 0; i < numFrames; i++) {
int smoothedGain = (int)(smoothedGains[i] * scaleFactor);
if (smoothedGain < 0)
smoothedGain = 0;
if (smoothedGain > 255)
smoothedGain = 255;
if (smoothedGain > maxGain)
maxGain = smoothedGain;
gainHist[smoothedGain]++;
}
// Re-calibrate the min to be 5%
double minGain = 0;
int sum = 0;
while (minGain < 255 && sum < numFrames / 20) {
sum += gainHist[(int)minGain];
minGain++;
}
// Re-calibrate the max to be 99%
sum = 0;
while (maxGain > 2 && sum < numFrames / 100) {
sum += gainHist[(int)maxGain];
maxGain--;
}
// Compute the heights
double[] heights = new double[numFrames];
double range = maxGain - minGain;
for (int i = 0; i < numFrames; i++) {
double value = (smoothedGains[i] * scaleFactor - minGain) / range;
if (value < 0.0)
value = 0.0;
if (value > 1.0)
value = 1.0;
heights[i] = value * value;
}
mNumZoomLevels = 5;
mLenByZoomLevel = new int[5];
mZoomFactorByZoomLevel = new double[5];
mValuesByZoomLevel = new double[5][];
// Level 0 is doubled, with interpolated values
mLenByZoomLevel[0] = numFrames * 2;
mZoomFactorByZoomLevel[0] = 2.0;
mValuesByZoomLevel[0] = new double[mLenByZoomLevel[0]];
if (numFrames > 0) {
mValuesByZoomLevel[0][0] = 0.5 * heights[0];
mValuesByZoomLevel[0][1] = heights[0];
}
for (int i = 1; i < numFrames; i++) {
mValuesByZoomLevel[0][2 * i] = 0.5 * (heights[i - 1] + heights[i]);
mValuesByZoomLevel[0][2 * i + 1] = heights[i];
}
// Level 1 is normal
mLenByZoomLevel[1] = numFrames;
mValuesByZoomLevel[1] = new double[mLenByZoomLevel[1]];
mZoomFactorByZoomLevel[1] = 1.0;
for (int i = 0; i < mLenByZoomLevel[1]; i++) {
mValuesByZoomLevel[1][i] = heights[i];
}
// 3 more levels are each halved
for (int j = 2; j < 5; j++) {
mLenByZoomLevel[j] = mLenByZoomLevel[j - 1] / 2;
mValuesByZoomLevel[j] = new double[mLenByZoomLevel[j]];
mZoomFactorByZoomLevel[j] = mZoomFactorByZoomLevel[j - 1] / 2.0;
for (int i = 0; i < mLenByZoomLevel[j]; i++) {
mValuesByZoomLevel[j][i] =
0.5 * (mValuesByZoomLevel[j - 1][2 * i] +
mValuesByZoomLevel[j - 1][2 * i + 1]);
}
}
if (numFrames > 5000) {
mZoomLevel = 3;
} else if (numFrames > 1000) {
mZoomLevel = 2;
} else if (numFrames > 300) {
mZoomLevel = 1;
} else {
mZoomLevel = 0;
}
mInitialized = true;
}
public boolean canZoomIn() {
return (mZoomLevel > 0);
}
public void zoomIn() {
if (canZoomIn()) {
mZoomLevel--;
mSelectionStart *= 2;
mSelectionEnd *= 2;
mHeightsAtThisZoomLevel = null;
int offsetCenter = mOffset + getMeasuredWidth() / 2;
offsetCenter *= 2;
mOffset = offsetCenter - getMeasuredWidth() / 2;
if (mOffset < 0)
mOffset = 0;
invalidate();
}
}
public boolean canZoomOut() {
return (mZoomLevel < mNumZoomLevels - 1);
}
public void zoomOut() {
if (canZoomOut()) {
mZoomLevel++;
mSelectionStart /= 2;
mSelectionEnd /= 2;
int offsetCenter = mOffset + getMeasuredWidth() / 2;
offsetCenter /= 2;
mOffset = offsetCenter - getMeasuredWidth() / 2;
if (mOffset < 0)
mOffset = 0;
mHeightsAtThisZoomLevel = null;
invalidate();
}
}
public double pixelsToSeconds(int pixels) {
double z = mZoomFactorByZoomLevel[mZoomLevel];
return (pixels * (double)mSamplesPerFrame / (mSampleRate * z));
}
public void setListener(WaveformListener listener) {
mListener = listener;
}
public void recomputeHeights(float density) {
mHeightsAtThisZoomLevel = null;
mDensity = density;
mTimecodePaint.setTextSize((int)(12 * density));
invalidate();
}
protected void drawWaveformLine(Canvas canvas,
int x, int y0, int y1,
Paint paint) {
canvas.drawLine(x, y0, x, y1, paint);
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mSoundFile == null)
return;
if (mHeightsAtThisZoomLevel == null)
computeIntsForThisZoomLevel();
DisplayMetrics displaymetrics = getContext().getResources().getDisplayMetrics();
int height = displaymetrics.heightPixels;
int widths = displaymetrics.widthPixels;
// Draw waveform
int measuredWidth = getMeasuredWidth();
int measuredHeight = getMeasuredHeight();
int start = mOffset;
int width = mHeightsAtThisZoomLevel.length - start;
int ctr = measuredHeight / 2;
Log.e("wid",String.valueOf(width));
Log.e("widCal",String.valueOf(mHeightsAtThisZoomLevel.length));
Log.e("widstart",String.valueOf(start));
if (width > measuredWidth)
width = measuredWidth;
Log.e("measured",String.valueOf(measuredWidth));
// Draw grid
double onePixelInSecs = pixelsToSeconds(1);
boolean onlyEveryFiveSecs = (onePixelInSecs > 1.0 / 50.0);
double fractionalSecs = mOffset * onePixelInSecs;
int integerSecs = (int) fractionalSecs;
int i = 0;
while (i < width) {
i++;
fractionalSecs += onePixelInSecs;
int integerSecsNew = (int) fractionalSecs;
if (integerSecsNew != integerSecs) {
integerSecs = integerSecsNew;
if (!onlyEveryFiveSecs || 0 == (integerSecs % 5)) {
canvas.drawLine(i, 0, i, measuredHeight, mGridPaint);
}
}
}
// Draw waveform
for ( i = 0; i < width; i++) {
Paint paint;
if (i + start >= mSelectionStart &&
i + start < mSelectionEnd) {
paint = mSelectedLinePaint;
// paint.setColor(color);
} else {
drawWaveformLine(canvas, ((widths/width)*i), 0, measuredHeight,
mUnselectedBkgndLinePaint);
paint = mUnselectedLinePaint;
}
drawWaveformLine(
canvas, ((widths/width)*i),
ctr - mHeightsAtThisZoomLevel[start + i],
ctr + 1 + mHeightsAtThisZoomLevel[start + i],
paint);
if (i + start == mPlaybackPos) {
canvas.drawLine(i, 0, i, measuredHeight, mPlaybackLinePaint);
}
}
if (mListener != null) {
mListener.waveformDraw();
}
}
private void computeIntsForThisZoomLevel() {
int halfHeight = (getMeasuredHeight() / 2) - 1;
mHeightsAtThisZoomLevel = new int[mLenByZoomLevel[mZoomLevel]];
for (int i = 0; i < mLenByZoomLevel[mZoomLevel]; i++) {
mHeightsAtThisZoomLevel[i] =
(int)(mValuesByZoomLevel[mZoomLevel][i] * halfHeight);
}
}
}
MainActivity.class
public class MainActivity extends AppCompatActivity implements WaveformView.WaveformListener {
WaveformView mWaveformView;
SoundFile mSoundFile;
private float mDensity;
private File mFile;
private String mFilename;
private long mLoadingLastUpdateTime;
boolean mLoadingKeepGoing;
boolean mFinishActivity;
private ProgressDialog mProgressDialog;
String mTitle,mArtist;
private Thread mLoadSoundFileThread;
private Thread mRecordAudioThread;
private Thread mSaveSoundFileThread;
private boolean mIsPlaying;
private SamplePlayer mPlayer;
private String mInfoContent;
private int mWidth;
private int mMaxPos;
private int mStartPos;
private int mEndPos;
private boolean mStartVisible;
private boolean mEndVisible;
private int mLastDisplayedStartPos;
private int mLastDisplayedEndPos;
private int mOffset;
private int mOffsetGoal;
private int mFlingVelocity;
private int mPlayStartMsec;
private int mPlayEndMsec;
private Handler mHandler;
Button pla;
MediaPlayer mediaPlayer;
boolean ismIsPlaying;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pla = (Button)findViewById(R.id.play);
mWaveformView = (WaveformView)findViewById(R.id.waveform);
mWaveformView.setListener(this);
mHandler = new Handler();
Uri uri = Uri.parse("/sdcard/audio_file.mp3");
mediaPlayer = new MediaPlayer();
mediaPlayer = MediaPlayer.create(getApplicationContext(),uri);
loadGui();
loadFromFile();
}
/**
* Called from both onCreate and onConfigurationChanged
* (if the user switched layouts)
*/
private void loadGui() {
// Inflate our UI from its XML layout description.
setContentView(R.layout.activity_main);
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
mDensity = metrics.density;
mWaveformView = (WaveformView)findViewById(R.id.waveform);
mWaveformView.setListener(this);
if (mSoundFile != null && !mWaveformView.hasSoundFile()) {
mWaveformView.setSoundFile(mSoundFile);
mWaveformView.recomputeHeights(mDensity);
}
}
private void loadFromFile() {
mFilename = "/sdcard/audio_file.mp3";
mFile = new File(mFilename);
SongMetadataReader metadataReader = new SongMetadataReader(
this, mFilename);
mTitle = metadataReader.mTitle;
mArtist = metadataReader.mArtist;
String titleLabel = mTitle;
if (mArtist != null && mArtist.length() > 0) {
titleLabel += " - " + mArtist;
}
setTitle(titleLabel);
mLoadingLastUpdateTime = getCurrentTime();
mLoadingKeepGoing = true;
mFinishActivity = false;
mProgressDialog = new ProgressDialog(MainActivity.this);
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mProgressDialog.setTitle("Loading...");
mProgressDialog.setCancelable(true);
mProgressDialog.setOnCancelListener(
new DialogInterface.OnCancelListener() {
public void onCancel(DialogInterface dialog) {
mLoadingKeepGoing = false;
mFinishActivity = true;
}
});
mProgressDialog.show();
final SoundFile.ProgressListener listener =
new SoundFile.ProgressListener() {
public boolean reportProgress(double fractionComplete) {
long now = getCurrentTime();
if (now - mLoadingLastUpdateTime > 100) {
mProgressDialog.setProgress(
(int) (mProgressDialog.getMax() * fractionComplete));
mLoadingLastUpdateTime = now;
}
return mLoadingKeepGoing;
}
};
// Load the sound file in a background thread
mLoadSoundFileThread = new Thread() {
public void run() {
try {
mSoundFile = SoundFile.create(mFile.getAbsolutePath(), listener);
if (mSoundFile == null) {
mProgressDialog.dismiss();
String name = mFile.getName().toLowerCase();
String[] components = name.split("\\.");
String err;
if (components.length < 2) {
err = getResources().getString(
R.string.no_extension_error);
} else {
err = getResources().getString(
R.string.bad_extension_error) + " " +
components[components.length - 1];
}
final String finalErr = err;
Runnable runnable = new Runnable() {
public void run() {
showFinalAlert(new Exception(), finalErr);
}
};
mHandler.post(runnable);
return;
}
mPlayer = new SamplePlayer(mSoundFile);
} catch (final Exception e) {
mProgressDialog.dismiss();
e.printStackTrace();
mInfoContent = e.toString();
runOnUiThread(new Runnable() {
public void run() {
}
});
Runnable runnable = new Runnable() {
public void run() {
showFinalAlert(e, getResources().getText(R.string.read_error));
}
};
mHandler.post(runnable);
return;
}
mProgressDialog.dismiss();
if (mLoadingKeepGoing) {
Runnable runnable = new Runnable() {
public void run() {
finishOpeningSoundFile();
}
};
mHandler.post(runnable);
} else if (mFinishActivity){
MainActivity.this.finish();
}
}
};
mLoadSoundFileThread.start();
}
private void finishOpeningSoundFile() {
mWaveformView.setSoundFile(mSoundFile);
mWaveformView.recomputeHeights(mDensity);
Log.e("sound file",mFilename);
Log.e("sound", String.valueOf(mSoundFile));
}
/**
* Show a "final" alert dialog that will exit the activity
* after the user clicks on the OK button. If an exception
* is passed, it's assumed to be an error condition, and the
* dialog is presented as an error, and the stack trace is
* logged. If there's no exception, it's a success message.
*/
private void showFinalAlert(Exception e, CharSequence message) {
CharSequence title;
if (e != null) {
Log.e("Ringdroid", "Error: " + message);
Log.e("Ringdroid", getStackTrace(e));
title = getResources().getText(R.string.alert_title_failure);
setResult(RESULT_CANCELED, new Intent());
} else {
Log.v("Ringdroid", "Success: " + message);
title = getResources().getText(R.string.alert_title_success);
}
new AlertDialog.Builder(MainActivity.this)
.setTitle(title)
.setMessage(message)
.setPositiveButton(
R.string.alert_ok_button,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
finish();
}
})
.setCancelable(false)
.show();
}
private void showFinalAlert(Exception e, int messageResourceId) {
showFinalAlert(e, getResources().getText(messageResourceId));
}
#Override
public void waveformTouchStart(float x) {
}
#Override
public void waveformTouchMove(float x) {
}
#Override
public void waveformTouchEnd() {
}
#Override
public void waveformFling(float x) {
}
#Override
public void waveformDraw() {
mWidth = mWaveformView.getMeasuredWidth();
if (mOffsetGoal != mOffset) {
// updateDisplay();
}
else if (mIsPlaying) {
// updateDisplay();
} else if (mFlingVelocity != 0) {
// updateDisplay();
}
}
private long getCurrentTime() {
return System.nanoTime() / 1000000;
}
private String getStackTrace(Exception e) {
StringWriter writer = new StringWriter();
e.printStackTrace(new PrintWriter(writer));
return writer.toString();
}
public void buttonClick(View view) {
Toast.makeText(MainActivity.this, "test", Toast.LENGTH_SHORT).show();
mediaPlayer.start();
ismIsPlaying = true;
}
}
In your onDraw(Canvas canvas) add the following lines
if (i + start <= mPlaybackPos) {
Paint mPaint = new Paint(paint);
mPaint.setColor(Color.RED);
drawWaveformLine(
canvas, ((widths/width)*i),
ctr - mHeightsAtThisZoomLevel[start + i],
ctr + 1 + mHeightsAtThisZoomLevel[start + i],
mPaint);
}
add them above the line:
if (i + start == mPlaybackPos) {
And if this works, consider to allocate the Paint-object outside the onDraw() method.
I need help with my game!
I am drawing my playermodel with a bitmap and I want to change the model with an ontouch event, but it is not working and I don't know, what I'm doing wrong: (
First of all here is my playerclass were I'm creating the bitmap:
public class Player extends GameObject{
private Bitmap spritesheet;
private String scoreText;
public int score;
private double dya;
private boolean up;
private boolean playing;
private Animation animation = new Animation();
private long startTime;
public boolean jumpable = false;
public boolean jumphigh;
public boolean falldown;
private int boden;
private boolean sliden;
public Player(Bitmap res, int w, int h, int numFrames) {
x = 100;
y = GamePanel.HEIGHT - GamePanel.HEIGHT / 4 +26 ;
//y = GamePanel.HEIGHT - GamePanel.HEIGHT / 4 - 100;
dy = 0;
score = 0;
height = h;
width = w;
boden = GamePanel.HEIGHT - GamePanel.HEIGHT / 4 -100;
Bitmap[] image = new Bitmap[numFrames];
spritesheet = res;
for (int i = 0; i < image.length; i++)
{
image[i] = Bitmap.createBitmap(spritesheet, i*width, 0, width, height);
}
animation.setFrames(image);
animation.setDelay(40);
startTime = System.nanoTime();
}
public void setUp(boolean b){up = b;}
public void update()
{
//score
long elapsed = (System.nanoTime()-startTime)/1000000;
if(elapsed>100)
{
score = score+7;
startTime = System.nanoTime();
scoreText = ""+score ;
}
animation.update();
if(up == true && jumpable == true){
jumphigh = true;
// dy = -5;
// System.out.println(up);
}else{
jumphigh = false;
}
if (jumphigh == true){
dy = -5;
}
if (falldown == true){
dy = 5;
}
if(dy>14)dy = 14;
if(dy<-14)dy = -14;
y += dy*2;
if (y >= boden){
y = boden;
jumpable = true;
falldown = false;
dy = 0;
}else if (y <= 60){
y= 60;
up = false ;
jumphigh = false;
falldown = true;
dy = 0;
}
if (y < GamePanel.HEIGHT - GamePanel.HEIGHT / 4 -100){
jumpable = false;
}
}
public void restart(){
x = 100;
y = GamePanel.HEIGHT - GamePanel.HEIGHT / 4 - 100;
dy = 0;
score = 0;
}
public void draw(Canvas canvas)
{
canvas.drawBitmap(animation.getImage(),x,y,null);
Paint paint = new Paint();
paint.setTypeface(Typeface.create(Typeface.SANS_SERIF,Typeface.NORMAL));
paint.setColor(Color.BLACK);
paint.setTextSize(50);
canvas.drawText(scoreText, 50 , 50 , paint);
}
public void setY(Canvas canvas){
y = GamePanel.HEIGHT - GamePanel.HEIGHT / 4 -20 ;
boden = GamePanel.HEIGHT - GamePanel.HEIGHT / 4 -20 ;
draw(canvas);
}
public int getScore(){return score;}
public void setSliden() {sliden = true; }
public boolean getPlaying(){return playing;}
public void setPlaying(boolean b){playing = b;}
public void resetP(){ x = 100;
y = GamePanel.HEIGHT - GamePanel.HEIGHT / 4 - 100;
dy = 0;}
public void resetDYA(){dya = 0;}
public void resetScore(){score = 0;}
And here is my gamepanel code where I'm calling my bitmap ( I give you only the parts you need for this question):
private Player player;
private int PlayerSprite = R.drawable.test;;
private int Playerhight = 120;
private int Playerwight = 115;
private int PlayerFrames = 8;
#Override
public void surfaceCreated(SurfaceHolder holder) {
player = new Player(BitmapFactory.decodeResource(getResources(), PlayerSprite), Playerwight, Playerhight, PlayerFrames);
invalidate();
thread.setRunning(true);
thread.start();
}
#Override
public boolean onTouchEvent(MotionEvent event) {
if(event.getAction()==MotionEvent.ACTION_DOWN){
PlayerSprite = R.drawable.sliden;
Playerhight = 52;
Playerwight = 130;
PlayerFrames = 1;
return true;
}
if(event.getAction()==MotionEvent.ACTION_UP)
{
player.setUp(false);
PlayerSprite = R.drawable.test;
Playerhight = 120;
Playerwight = 115;
PlayerFrames = 8;
return true;
}
return super.onTouchEvent(event);
}
public void update() {
if (player.getPlaying() == true && State == STATE.INGAME) {
player.update();
#Override
public void draw(Canvas canvas) {
super.draw(canvas);
final float scaleFactorX = getWidth() / (WIDTH*1.f);
final float scaleFactorY = getHeight() / (HEIGHT*1.f);
if (canvas != null && State == STATE.INGAME) {
final int savedState = canvas.save();
canvas.scale(scaleFactorX, scaleFactorY);
player.draw(canvas);
canvas.restoreToCount(savedState);
invalidate();
}
}
I want just want to change the image of the player with a onTouch event and its just not working.
Just call invalidate() in onTouchEvent(MotionEvent event)() and see the change.
Do not call invalidate in onDraw(), it will cause the permanent loop and reduce the performance of your app.
Em...the title is not clearly, here is my question: i custom a view to display calendar, my logic is when user swipe horizontal it can switch month of current year, when user swipe vertical it can switch year of current month, like image below:
Here is my all code below and i delete some useless code:
public class MonthView extends View {
private static final Region[][] MONTH_REGIONS = new Region[6][7];
private DPCManager mCManager = DPCManager.getInstance();
private DPTManager mTManager = DPTManager.getInstance();
private TextPaint mTextPaint;
private Paint mPaint;
private Scroller mScroller;
private DecelerateInterpolator decelerateInterpolator = new DecelerateInterpolator();
private AccelerateInterpolator accelerateInterpolator = new AccelerateInterpolator();
private OnDateChangeListener onDateChangeListener;
private ScaleAnimationListener scaleAnimationListener = new ScaleAnimationListener();
private DPMode mode;
private int indexYear, indexMonth;
private int centerYear, centerMonth;
private int leftYear, leftMonth;
private int rightYear, rightMonth;
private int topYear, topMonth;
private int bottomYear, bottomMonth;
private int width, height;
private int lastHeight, nextHeight;
private int baseSize;
private int sizeDecor, sizeDecor2x, sizeDecor3x;
private int lastPointX, lastPointY;
private int lastMoveX, lastMoveY;
private int criticalWidth, criticalHeight;
private float sizeTextGregorian, sizeTextFestival;
private float offsetYFestival1, offsetYFestival2;
private boolean isSlideV;
private Map<String, BGCircle> circlesAppear = new HashMap<>();
private Map<String, BGCircle> circlesDisappear = new HashMap<>();
private List<String> dateSelected = new ArrayList<>();
public interface OnDateChangeListener {
void onMonthChange(int month);
void onYearChange(int year);
}
public MonthView(Context context) {
this(context, null);
}
public MonthView(Context context, AttributeSet attrs) {
super(context, attrs);
mScroller = new Scroller(context);
mTextPaint = new TextPaint();
mTextPaint.setTextAlign(Paint.Align.CENTER);
mPaint = new Paint();
}
void setOnDateChangeListener(OnDateChangeListener onDateChangeListener) {
this.onDateChangeListener = onDateChangeListener;
}
void setMode(DPMode mode) {
this.mode = mode;
}
void setDate(int year, int month) {
centerYear = year;
centerMonth = month;
indexYear = 0;
indexMonth = 0;
computeDate();
requestLayout();
invalidate();
}
private void computeDate() {
rightYear = leftYear = centerYear;
topYear = centerYear - 1;
bottomYear = centerYear + 1;
topMonth = centerMonth;
bottomMonth = centerMonth;
rightMonth = centerMonth + 1;
leftMonth = centerMonth - 1;
if (centerMonth == 12) {
rightYear++;
rightMonth = 1;
}
if (centerMonth == 1) {
leftYear--;
leftMonth = 12;
}
if (null != onDateChangeListener) {
onDateChangeListener.onYearChange(centerYear);
onDateChangeListener.onMonthChange(centerMonth);
}
}
#Override
public void computeScroll() {
if (mScroller.computeScrollOffset()) {
scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
} else {
}
}
boolean isNewEvent = false;
#Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
isNewEvent = true;
lastPointX = (int) event.getX();
lastPointY = (int) event.getY();
break;
case MotionEvent.ACTION_MOVE:
if (isNewEvent) {
if (Math.abs(lastPointX - event.getX()) > 100) {
isSlideV = false;
isNewEvent = false;
} else if (Math.abs(lastPointY - event.getY()) > 50) {
isSlideV = true;
isNewEvent = false;
}
}
if (isSlideV) {
int totalMoveY = (int) (lastPointY - event.getY()) + lastMoveY;
smoothScrollTo(0, totalMoveY);
} else {
int totalMoveX = (int) (lastPointX - event.getX()) + lastMoveX;
smoothScrollTo(totalMoveX, 0);
}
break;
case MotionEvent.ACTION_UP:
if (isSlideV) {
if (Math.abs(lastPointY - event.getY()) > 25) {
if (lastPointY < event.getY()) {
if (Math.abs(lastPointY - event.getY()) >= criticalHeight) {
indexYear--;
centerYear = centerYear - 1;
computeDate();
}
smoothScrollTo(0, height * indexYear);
lastMoveY = height * indexYear;
} else if (lastPointY > event.getY()) {
if (Math.abs(lastPointY - event.getY()) >= criticalHeight) {
indexYear++;
centerYear = centerYear + 1;
computeDate();
}
smoothScrollTo(0, height * indexYear);
lastMoveY = height * indexYear;
}
} else {
}
} else {
if (Math.abs(lastPointX - event.getX()) > 25) {
if (lastPointX > event.getX()) {
if (Math.abs(lastPointX - event.getX()) >= criticalWidth) {
indexMonth++;
centerMonth = (centerMonth + 1) % 13;
if (centerMonth == 0) {
centerMonth = 1;
centerYear++;
}
computeDate();
}
smoothScrollTo(width * indexMonth, 0);
lastMoveX = width * indexMonth;
} else if (lastPointX < event.getX()) {
if (Math.abs(lastPointX - event.getX()) >= criticalWidth) {
indexMonth--;
centerMonth = (centerMonth - 1) % 12;
if (centerMonth == 0) {
centerMonth = 12;
centerYear--;
}
computeDate();
}
smoothScrollTo(width * indexMonth, 0);
lastMoveX = width * indexMonth;
}
} else {
}
}
break;
}
return true;
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int measureWidth = MeasureSpec.getSize(widthMeasureSpec);
setMeasuredDimension(measureWidth, measureWidth * 6 / 7F);
}
#Override
protected void onSizeChanged(int w, int h, int oldW, int oldH) {
width = w;
height = h;
criticalWidth = (int) (1F / 5F * width);
criticalHeight = (int) (1F / 5F * height);
baseSize = w;
int sizeCell = (int) (baseSize / 7F);
sizeDecor = (int) (sizeCell / 3F);
sizeDecor2x = sizeDecor * 2;
sizeDecor3x = sizeDecor * 3;
sizeTextGregorian = baseSize / 20F;
mTextPaint.setTextSize(sizeTextGregorian);
float heightGregorian = mTextPaint.getFontMetrics().bottom - mTextPaint.getFontMetrics().top;
sizeTextFestival = baseSize / 40F;
mTextPaint.setTextSize(sizeTextFestival);
float heightFestival = mTextPaint.getFontMetrics().bottom - mTextPaint.getFontMetrics().top;
offsetYFestival1 = (((Math.abs(mTextPaint.ascent() + mTextPaint.descent())) / 2F) +
heightFestival / 2F + heightGregorian / 2F) / 2F;
offsetYFestival2 = offsetYFestival1 * 2F;
for (int i = 0; i < MONTH_REGIONS.length; i++) {
for (int j = 0; j < MONTH_REGIONS[i].length; j++) {
Region region = new Region();
region.set((j * sizeCell), (i * sizeCell), sizeCell + (j * sizeCell),
sizeCell + (i * sizeCell));
MONTH_REGIONS[i][j] = region;
}
}
}
#Override
protected void onDraw(Canvas canvas) {
canvas.drawColor(Color.LTGRAY);
draw(canvas, width * (indexMonth - 1), height * indexYear, leftYear, leftMonth);
draw(canvas, width * indexMonth, height * indexYear, centerYear, centerMonth);
draw(canvas, width * (indexMonth + 1), height * indexYear, rightYear, rightMonth);
draw(canvas, width * indexMonth, height * (indexYear - 1), topYear, topMonth);
draw(canvas, width * indexMonth, height * (indexYear + 1), bottomYear, bottomMonth);
}
private void draw(Canvas canvas, int x, int y, int year, int month) {
canvas.save();
canvas.translate(x, y);
DPInfo[][] info = mCManager.obtainDPInfo(year, month);
for (int i = 0; i < info.length; i++) {
for (int j = 0; j < info[i].length; j++) {
draw(canvas, MONTH_REGIONS[i][j].getBounds(), info[i][j]);
}
}
canvas.restore();
}
private void draw(Canvas canvas, Rect rect, DPInfo info) {
drawGregorian(canvas, rect, info.strG, info.isWeekend);
}
private void drawGregorian(Canvas canvas, Rect rect, String str, boolean isWeekend) {
mTextPaint.setTextSize(sizeTextGregorian);
if (isWeekend) {
mTextPaint.setColor(mTManager.colorWeekend());
} else {
mTextPaint.setColor(mTManager.colorG());
}
canvas.drawText(str, rect.centerX(), rect.centerY(), mTextPaint);
}
private void smoothScrollTo(int fx, int fy) {
int dx = fx - mScroller.getFinalX();
int dy = fy - mScroller.getFinalY();
smoothScrollBy(dx, dy);
}
private void smoothScrollBy(int dx, int dy) {
mScroller.startScroll(mScroller.getFinalX(), mScroller.getFinalY(), dx, dy, 500);
invalidate();
}
}
If i swipe vertical to switch year, for example 2015/7-->2016/7-->2017/7, it's run correctly, but now if i swipe horizontal to switch month, for example 2017/7-->2017/6, everything will not display:
That's mean only horizontal and vertical on current month can touch and display correctly, for example the default display month is 2015/7, when i swipe to 2016/7 or 2017/7, i can't get the correct display when i swipe to 2017/6 or 2017/8, only swipe back to 2015/7 to swipe correctly can get the correct display of 2015/6 and 2015/8.
This problem troubled me many days, the coordinates and data of months all correct, i don't know why it happen, hope and thanks for your answer.
I want to implement the Ringdroid waveform in my android app.But for some songs,the waveform created after choosing the song is larger than the screen size and for songs the waveform width is smaller than the mobile screen width .
Plz suggest me the change in code of Ringdroid ,so that every time the waveform of song totally covers the width of screen.
This is the link of Ringdroid project
https://github.com/google/ringdroid
After a whole lot of searching and surfing about it. I tried it myself and got the desired output with it
This is the WaveformView class of Ringdroid
package com.ringdroid;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.DashPathEffect;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;
import android.view.View;
import com.ringdroid.soundfile.SoundFile;
/**
* WaveformView is an Android view that displays a visual representation
* of an audio waveform. It retrieves the frame gains from a CheapSoundFile
* object and recomputes the shape contour at several zoom levels.
*
* This class doesn't handle selection or any of the touch interactions
* directly, so it exposes a listener interface. The class that embeds
* this view should add itself as a listener and make the view scroll
* and respond to other events appropriately.
*
* WaveformView doesn't actually handle selection, but it will just display
* the selected part of the waveform in a different color.
*/
public class WaveformView extends View {
public interface WaveformListener {
public void waveformTouchStart(float x);
public void waveformTouchMove(float x);
public void waveformTouchEnd();
public void waveformFling(float x);
public void waveformDraw();
public void waveformZoomIn();
public void waveformZoomOut();
};
// Colors
private Paint mGridPaint;
private Paint mSelectedLinePaint;
private Paint mUnselectedLinePaint;
private Paint mUnselectedBkgndLinePaint;
private Paint mBorderLinePaint;
private Paint mPlaybackLinePaint;
private Paint mTimecodePaint;
private SoundFile mSoundFile;
private int[] mLenByZoomLevel;
private double[][] mValuesByZoomLevel;
private double[] mZoomFactorByZoomLevel;
private int[] mHeightsAtThisZoomLevel;
private int mZoomLevel;
private int mNumZoomLevels;
private int mSampleRate;
private int mSamplesPerFrame;
private int mOffset;
private int mSelectionStart;
private int mSelectionEnd;
private int mPlaybackPos;
private float mDensity;
private float mInitialScaleSpan;
private WaveformListener mListener;
private GestureDetector mGestureDetector;
private ScaleGestureDetector mScaleGestureDetector;
private boolean mInitialized;
public WaveformView(Context context, AttributeSet attrs) {
super(context, attrs);
// We don't want keys, the markers get these
setFocusable(false);
Resources res = getResources();
mGridPaint = new Paint();
mGridPaint.setAntiAlias(false);
mGridPaint.setColor(res.getColor(R.color.grid_line));
mSelectedLinePaint = new Paint();
mSelectedLinePaint.setAntiAlias(false);
mSelectedLinePaint.setColor(res.getColor(R.color.waveform_selected));
mUnselectedLinePaint = new Paint();
mUnselectedLinePaint.setAntiAlias(false);
mUnselectedLinePaint.setColor(res.getColor(R.color.waveform_unselected));
mUnselectedBkgndLinePaint = new Paint();
mUnselectedBkgndLinePaint.setAntiAlias(false);
mUnselectedBkgndLinePaint.setColor(res.getColor(R.color.waveform_unselected_bkgnd_overlay));
mBorderLinePaint = new Paint();
mBorderLinePaint.setAntiAlias(true);
mBorderLinePaint.setStrokeWidth(1.5f);
mBorderLinePaint.setPathEffect(new DashPathEffect(new float[] { 3.0f, 2.0f }, 0.0f));
mBorderLinePaint.setColor(res.getColor(R.color.selection_border));
mPlaybackLinePaint = new Paint();
mPlaybackLinePaint.setAntiAlias(false);
mPlaybackLinePaint.setColor(res.getColor(R.color.playback_indicator));
mTimecodePaint = new Paint();
mTimecodePaint.setTextSize(12);
mTimecodePaint.setAntiAlias(true);
mTimecodePaint.setColor(res.getColor(R.color.timecode));
mTimecodePaint.setShadowLayer(2, 1, 1, res.getColor(R.color.timecode_shadow));
mGestureDetector = new GestureDetector(
context,
new GestureDetector.SimpleOnGestureListener() {
public boolean onFling(MotionEvent e1, MotionEvent e2, float vx, float vy) {
mListener.waveformFling(vx);
return true;
}
}
);
mScaleGestureDetector = new ScaleGestureDetector(
context,
new ScaleGestureDetector.SimpleOnScaleGestureListener() {
public boolean onScaleBegin(ScaleGestureDetector d) {
Log.v("Ringdroid", "ScaleBegin " + d.getCurrentSpanX());
mInitialScaleSpan = Math.abs(d.getCurrentSpanX());
return true;
}
public boolean onScale(ScaleGestureDetector d) {
float scale = Math.abs(d.getCurrentSpanX());
Log.v("Ringdroid", "Scale " + (scale - mInitialScaleSpan));
if (scale - mInitialScaleSpan > 40) {
mListener.waveformZoomIn();
mInitialScaleSpan = scale;
}
if (scale - mInitialScaleSpan < -40) {
mListener.waveformZoomOut();
mInitialScaleSpan = scale;
}
return true;
}
public void onScaleEnd(ScaleGestureDetector d) {
Log.v("Ringdroid", "ScaleEnd " + d.getCurrentSpanX());
}
}
);
mSoundFile = null;
mLenByZoomLevel = null;
mValuesByZoomLevel = null;
mHeightsAtThisZoomLevel = null;
mOffset = 0;
mPlaybackPos = -1;
mSelectionStart = 0;
mSelectionEnd = 0;
mDensity = 1.0f;
mInitialized = false;
}
#Override
public boolean onTouchEvent(MotionEvent event) {
mScaleGestureDetector.onTouchEvent(event);
if (mGestureDetector.onTouchEvent(event)) {
return true;
}
switch(event.getAction()) {
case MotionEvent.ACTION_DOWN:
mListener.waveformTouchStart(event.getX());
break;
case MotionEvent.ACTION_MOVE:
mListener.waveformTouchMove(event.getX());
break;
case MotionEvent.ACTION_UP:
mListener.waveformTouchEnd();
break;
}
return true;
}
public boolean hasSoundFile() {
return mSoundFile != null;
}
public void setSoundFile(SoundFile soundFile) {
mSoundFile = soundFile;
mSampleRate = mSoundFile.getSampleRate();
mSamplesPerFrame = mSoundFile.getSamplesPerFrame();
computeDoublesForAllZoomLevels();
mHeightsAtThisZoomLevel = null;
}
public boolean isInitialized() {
return mInitialized;
}
public int getZoomLevel() {
return mZoomLevel;
}
public void setZoomLevel(int zoomLevel) {
while (mZoomLevel > zoomLevel) {
zoomIn();
}
while (mZoomLevel < zoomLevel) {
zoomOut();
}
}
public boolean canZoomIn() {
return (mZoomLevel > 0);
}
public void zoomIn() {
if (canZoomIn()) {
mZoomLevel--;
mSelectionStart *= 2;
mSelectionEnd *= 2;
mHeightsAtThisZoomLevel = null;
int offsetCenter = mOffset + getMeasuredWidth() / 2;
offsetCenter *= 2;
mOffset = offsetCenter - getMeasuredWidth() / 2;
if (mOffset < 0)
mOffset = 0;
invalidate();
}
}
public boolean canZoomOut() {
return (mZoomLevel < mNumZoomLevels - 1);
}
public void zoomOut() {
if (canZoomOut()) {
mZoomLevel++;
mSelectionStart /= 2;
mSelectionEnd /= 2;
int offsetCenter = mOffset + getMeasuredWidth() / 2;
offsetCenter /= 2;
mOffset = offsetCenter - getMeasuredWidth() / 2;
if (mOffset < 0)
mOffset = 0;
mHeightsAtThisZoomLevel = null;
invalidate();
}
}
public int maxPos() {
return mLenByZoomLevel[mZoomLevel];
}
public int secondsToFrames(double seconds) {
return (int)(1.0 * seconds * mSampleRate / mSamplesPerFrame + 0.5);
}
public int secondsToPixels(double seconds) {
double z = mZoomFactorByZoomLevel[mZoomLevel];
return (int)(z * seconds * mSampleRate / mSamplesPerFrame + 0.5);
}
public double pixelsToSeconds(int pixels) {
double z = mZoomFactorByZoomLevel[mZoomLevel];
return (pixels * (double)mSamplesPerFrame / (mSampleRate * z));
}
public int millisecsToPixels(int msecs) {
double z = mZoomFactorByZoomLevel[mZoomLevel];
return (int)((msecs * 1.0 * mSampleRate * z) /
(1000.0 * mSamplesPerFrame) + 0.5);
}
public int pixelsToMillisecs(int pixels) {
double z = mZoomFactorByZoomLevel[mZoomLevel];
return (int)(pixels * (1000.0 * mSamplesPerFrame) /
(mSampleRate * z) + 0.5);
}
public void setParameters(int start, int end, int offset) {
mSelectionStart = start;
mSelectionEnd = end;
mOffset = offset;
}
public int getStart() {
return mSelectionStart;
}
public int getEnd() {
return mSelectionEnd;
}
public int getOffset() {
return mOffset;
}
public void setPlayback(int pos) {
mPlaybackPos = pos;
}
public void setListener(WaveformListener listener) {
mListener = listener;
}
public void recomputeHeights(float density) {
mHeightsAtThisZoomLevel = null;
mDensity = density;
mTimecodePaint.setTextSize((int)(12 * density));
invalidate();
}
protected void drawWaveformLine(Canvas canvas,
int x, int y0, int y1,
Paint paint) {
canvas.drawLine(x, y0, x, y1, paint);
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mSoundFile == null)
return;
if (mHeightsAtThisZoomLevel == null)
computeIntsForThisZoomLevel();
// Draw waveform
int measuredWidth = getMeasuredWidth();
int measuredHeight = getMeasuredHeight();
int start = mOffset;
int width = mHeightsAtThisZoomLevel.length - start;
int ctr = measuredHeight / 2;
if (width > measuredWidth)
width = measuredWidth;
// Draw grid
double onePixelInSecs = pixelsToSeconds(1);
boolean onlyEveryFiveSecs = (onePixelInSecs > 1.0 / 50.0);
double fractionalSecs = mOffset * onePixelInSecs;
int integerSecs = (int) fractionalSecs;
int i = 0;
while (i < width) {
i++;
fractionalSecs += onePixelInSecs;
int integerSecsNew = (int) fractionalSecs;
if (integerSecsNew != integerSecs) {
integerSecs = integerSecsNew;
if (!onlyEveryFiveSecs || 0 == (integerSecs % 5)) {
canvas.drawLine(i, 0, i, measuredHeight, mGridPaint);
}
}
}
// Draw waveform
for (i = 0; i < width; i++) {
Paint paint;
if (i + start >= mSelectionStart &&
i + start < mSelectionEnd) {
paint = mSelectedLinePaint;
} else {
drawWaveformLine(canvas, i, 0, measuredHeight,
mUnselectedBkgndLinePaint);
paint = mUnselectedLinePaint;
}
drawWaveformLine(
canvas, i,
ctr - mHeightsAtThisZoomLevel[start + i],
ctr + 1 + mHeightsAtThisZoomLevel[start + i],
paint);
if (i + start == mPlaybackPos) {
canvas.drawLine(i, 0, i, measuredHeight, mPlaybackLinePaint);
}
}
// If we can see the right edge of the waveform, draw the
// non-waveform area to the right as unselected
for (i = width; i < measuredWidth; i++) {
drawWaveformLine(canvas, i, 0, measuredHeight,
mUnselectedBkgndLinePaint);
}
// Draw borders
canvas.drawLine(
mSelectionStart - mOffset + 0.5f, 30,
mSelectionStart - mOffset + 0.5f, measuredHeight,
mBorderLinePaint);
canvas.drawLine(
mSelectionEnd - mOffset + 0.5f, 0,
mSelectionEnd - mOffset + 0.5f, measuredHeight - 30,
mBorderLinePaint);
// Draw timecode
double timecodeIntervalSecs = 1.0;
if (timecodeIntervalSecs / onePixelInSecs < 50) {
timecodeIntervalSecs = 5.0;
}
if (timecodeIntervalSecs / onePixelInSecs < 50) {
timecodeIntervalSecs = 15.0;
}
// Draw grid
fractionalSecs = mOffset * onePixelInSecs;
int integerTimecode = (int) (fractionalSecs / timecodeIntervalSecs);
i = 0;
while (i < width) {
i++;
fractionalSecs += onePixelInSecs;
integerSecs = (int) fractionalSecs;
int integerTimecodeNew = (int) (fractionalSecs /
timecodeIntervalSecs);
if (integerTimecodeNew != integerTimecode) {
integerTimecode = integerTimecodeNew;
// Turn, e.g. 67 seconds into "1:07"
String timecodeMinutes = "" + (integerSecs / 60);
String timecodeSeconds = "" + (integerSecs % 60);
if ((integerSecs % 60) < 10) {
timecodeSeconds = "0" + timecodeSeconds;
}
String timecodeStr = timecodeMinutes + ":" + timecodeSeconds;
float offset = (float) (
0.5 * mTimecodePaint.measureText(timecodeStr));
canvas.drawText(timecodeStr,
i - offset,
(int)(12 * mDensity),
mTimecodePaint);
}
}
if (mListener != null) {
mListener.waveformDraw();
}
}
/**
* Called once when a new sound file is added
*/
private void computeDoublesForAllZoomLevels() {
int numFrames = mSoundFile.getNumFrames();
int[] frameGains = mSoundFile.getFrameGains();
double[] smoothedGains = new double[numFrames];
if (numFrames == 1) {
smoothedGains[0] = frameGains[0];
} else if (numFrames == 2) {
smoothedGains[0] = frameGains[0];
smoothedGains[1] = frameGains[1];
} else if (numFrames > 2) {
smoothedGains[0] = (double)(
(frameGains[0] / 2.0) +
(frameGains[1] / 2.0));
for (int i = 1; i < numFrames - 1; i++) {
smoothedGains[i] = (double)(
(frameGains[i - 1] / 3.0) +
(frameGains[i ] / 3.0) +
(frameGains[i + 1] / 3.0));
}
smoothedGains[numFrames - 1] = (double)(
(frameGains[numFrames - 2] / 2.0) +
(frameGains[numFrames - 1] / 2.0));
}
// Make sure the range is no more than 0 - 255
double maxGain = 1.0;
for (int i = 0; i < numFrames; i++) {
if (smoothedGains[i] > maxGain) {
maxGain = smoothedGains[i];
}
}
double scaleFactor = 1.0;
if (maxGain > 255.0) {
scaleFactor = 255 / maxGain;
}
// Build histogram of 256 bins and figure out the new scaled max
maxGain = 0;
int gainHist[] = new int[256];
for (int i = 0; i < numFrames; i++) {
int smoothedGain = (int)(smoothedGains[i] * scaleFactor);
if (smoothedGain < 0)
smoothedGain = 0;
if (smoothedGain > 255)
smoothedGain = 255;
if (smoothedGain > maxGain)
maxGain = smoothedGain;
gainHist[smoothedGain]++;
}
// Re-calibrate the min to be 5%
double minGain = 0;
int sum = 0;
while (minGain < 255 && sum < numFrames / 20) {
sum += gainHist[(int)minGain];
minGain++;
}
// Re-calibrate the max to be 99%
sum = 0;
while (maxGain > 2 && sum < numFrames / 100) {
sum += gainHist[(int)maxGain];
maxGain--;
}
// Compute the heights
double[] heights = new double[numFrames];
double range = maxGain - minGain;
for (int i = 0; i < numFrames; i++) {
double value = (smoothedGains[i] * scaleFactor - minGain) / range;
if (value < 0.0)
value = 0.0;
if (value > 1.0)
value = 1.0;
heights[i] = value * value;
}
mNumZoomLevels = 5;
mLenByZoomLevel = new int[5];
mZoomFactorByZoomLevel = new double[5];
mValuesByZoomLevel = new double[5][];
// Level 0 is doubled, with interpolated values
mLenByZoomLevel[0] = numFrames * 2;
mZoomFactorByZoomLevel[0] = 2.0;
mValuesByZoomLevel[0] = new double[mLenByZoomLevel[0]];
if (numFrames > 0) {
mValuesByZoomLevel[0][0] = 0.5 * heights[0];
mValuesByZoomLevel[0][1] = heights[0];
}
for (int i = 1; i < numFrames; i++) {
mValuesByZoomLevel[0][2 * i] = 0.5 * (heights[i - 1] + heights[i]);
mValuesByZoomLevel[0][2 * i + 1] = heights[i];
}
// Level 1 is normal
mLenByZoomLevel[1] = numFrames;
mValuesByZoomLevel[1] = new double[mLenByZoomLevel[1]];
mZoomFactorByZoomLevel[1] = 1.0;
for (int i = 0; i < mLenByZoomLevel[1]; i++) {
mValuesByZoomLevel[1][i] = heights[i];
}
// 3 more levels are each halved
for (int j = 2; j < 5; j++) {
mLenByZoomLevel[j] = mLenByZoomLevel[j - 1] / 2;
mValuesByZoomLevel[j] = new double[mLenByZoomLevel[j]];
mZoomFactorByZoomLevel[j] = mZoomFactorByZoomLevel[j - 1] / 2.0;
for (int i = 0; i < mLenByZoomLevel[j]; i++) {
mValuesByZoomLevel[j][i] =
0.5 * (mValuesByZoomLevel[j - 1][2 * i] +
mValuesByZoomLevel[j - 1][2 * i + 1]);
}
}
if (numFrames > 5000) {
mZoomLevel = 3;
} else if (numFrames > 1000) {
mZoomLevel = 2;
} else if (numFrames > 300) {
mZoomLevel = 1;
} else {
mZoomLevel = 0;
}
mInitialized = true;
}
/**
* Called the first time we need to draw when the zoom level has changed
* or the screen is resized
*/
private void computeIntsForThisZoomLevel() {
int halfHeight = (getMeasuredHeight() / 2) - 1;
mHeightsAtThisZoomLevel = new int[mLenByZoomLevel[mZoomLevel]];
for (int i = 0; i < mLenByZoomLevel[mZoomLevel]; i++) {
mHeightsAtThisZoomLevel[i] =
(int)(mValuesByZoomLevel[mZoomLevel][i] * halfHeight);
}
}
}
The change is here in this part of code
DisplayMetrics displaymetrics = getContext().getResources().getDisplayMetrics();
int ScreenWidth= displaymetrics.widthPixels;
// Draw waveform
for ( i = 0; i < width; i++) {
Paint paint;
if (i + start >= mSelectionStart &&
i + start < mSelectionEnd) {
paint = mSelectedLinePaint;
} else {
drawWaveformLine(canvas, ((ScreenWidth/width)*i), 0, measuredHeight,
mUnselectedBkgndLinePaint);
paint = mUnselectedLinePaint;
}
drawWaveformLine(
canvas, ((ScreenWidth/width)*i),
ctr - mHeightsAtThisZoomLevel[start + i],
ctr + 1 + mHeightsAtThisZoomLevel[start + i],
paint);
you have to change the x-axis of draw line method according to your screen size
import java.util.LinkedList;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.SurfaceView;
/**
* A view that displays audio data on the screen as a waveform.
*/
public class WaveformView extends SurfaceView {
// The number of buffer frames to keep around (for a nice fade-out
// visualization.
private static final int HISTORY_SIZE = 6;
// To make quieter sounds still show up well on the display, we use
// +/- 8192 as the amplitude that reaches the top/bottom of the view
// instead of +/- 32767. Any samples that have magnitude higher than this
// limit will simply be clipped during drawing.
private static final float MAX_AMPLITUDE_TO_DRAW = 8192.0f;
// The queue that will hold historical audio data.
private LinkedList<short[]> mAudioData;
private Paint mPaint;
public WaveformView(Context context) {
this(context, null, 0);
}
public WaveformView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public WaveformView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mAudioData = new LinkedList<short[]>();
mPaint = new Paint();
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setColor(Color.WHITE);
mPaint.setStrokeWidth(0);
mPaint.setAntiAlias(true);
}
/**
* Updates the waveform view with a new "frame" of samples and renders it.
* The new frame gets added to the front of the rendering queue, pushing the
* previous frames back, causing them to be faded out visually.
*
* #param buffer the most recent buffer of audio samples.
*/
public synchronized void updateAudioData(short[] buffer) {
short[] newBuffer;
// We want to keep a small amount of history in the view to provide a nice
// fading effect. We use a linked list that we treat as a queue for this.
if (mAudioData.size() == HISTORY_SIZE) {
newBuffer = mAudioData.removeFirst();
System.arraycopy(buffer, 0, newBuffer, 0, buffer.length);
} else {
newBuffer = buffer.clone();
}
mAudioData.addLast(newBuffer);
// Update the display.
Canvas canvas = getHolder().lockCanvas();
if (canvas != null) {
drawWaveform(canvas);
getHolder().unlockCanvasAndPost(canvas);
}
}
/**
* Repaints the view's surface.
*
* #param canvas the {#link Canvas} object on which to draw.
*/
private void drawWaveform(Canvas canvas) {
// Clear the screen each time because SurfaceView won't do this for us.
canvas.drawColor(Color.BLACK);
float width = getWidth();
float height = getHeight();
float centerY = height / 2;
// We draw the history from oldest to newest so that the older audio
// data is further back and darker than the most recent data.
int colorDelta = 255 / (HISTORY_SIZE + 1);
int brightness = colorDelta;
for (short[] buffer : mAudioData) {
mPaint.setColor(Color.argb(brightness, 128, 255, 192));
float lastX = -1;
float lastY = -1;
// For efficiency, we don't draw all of the samples in the buffer,
// but only the ones that align with pixel boundaries.
for (int x = 0; x < width; x++) {
int index = (int) ((x / width) * buffer.length);
short sample = buffer[index];
float y = (sample / MAX_AMPLITUDE_TO_DRAW) * centerY + centerY;
if (lastX != -1) {
canvas.drawLine(lastX, lastY, x, y, mPaint);
}
lastX = x;
lastY = y;
}
brightness += colorDelta;
}
}
}
Hi I want to implement an 'image score counter' in my android game but it does not work well. However it compiles well but soon when ball reaches screen edge app returns error:
04-08 10:07:31.639: E/AndroidRuntime(8599): FATAL EXCEPTION: Thread-1176
04-08
10:07:31.639: E/AndroidRuntime(8599): java.lang.NullPointerException
04-08 10:07:31.639: E/AndroidRuntime(8599):at com.Pong.GameState.update(GameState.java:154)
04-08 10:07:31.639: E/AndroidRuntime(8599):at com.Pong.GameThread.run(GameThread.java:41)
I got 3 files that menage the game:
GameState.java GameView.java GameThread.java:
The errors are in:
GameState.java:
TopCounter.setImageResource(myImageList[i+1]);
GameThread.java:
_state.update();
This is how GameThread.java looks like:
package com.Pong;
import....
class GameThread extends Thread {
private SurfaceHolder surfaceHolder;
private GameView gameView;
private Paint _paint;
private GameState _state;
private boolean run = false;
public GameThread(SurfaceHolder surfaceHolder, GameView gameView, Context context, Handler handler) {
this.surfaceHolder = surfaceHolder;
this.gameView = gameView;
_paint = new Paint();
_state = new GameState();
}
public void setRunning(boolean run) {
this.run = run;
}
public SurfaceHolder getSurfaceHolder() {
return surfaceHolder;
}
#Override
public void run() {
Canvas c;
while (run) {
c = null;
try {
c = surfaceHolder.lockCanvas(null);
synchronized (surfaceHolder) {
gameView.onDraw(c);
_state.update(); //here is the error
_state.draw(c, _paint);
}
} finally {
if (c != null) {
surfaceHolder.unlockCanvasAndPost(c);
}
}
}
}
public GameState getGameState()
{
return _state;
}
}
This is how GameState.java looks like (I cut unnecessary lines):
package com.Pong;
Import ...
public class GameState extends Activity implements View.OnTouchListener {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gamestate);
TopCounter = (ImageView) findViewById(R.id.counterT);
BottomCounter = (ImageView) findViewById(R.id.counterB);
}
int _screenWidth = 270;
int _screenHeight = 395;
int _ballSize = 10;
int _ballX = 100;
int _ballY = 100;
int _ballVelocityX = 3;
int _ballVelocityY = 3;
int _batLength = 75;
int _batHeight = 10;
int _topBatX = (_screenWidth / 2+25) - (_batLength / 2);
int _topBatY = 54;
int _bottomBatX = (_screenWidth / 2+25) - (_batLength / 2);
int _bottomBatY = 392;
int i=0;
// under is matrix that contains images to my counter.
int[] myImageList = new int[]{
R.drawable.counter00,
R.drawable.counter01,
R.drawable.counter02,
R.drawable.counter03,
R.drawable.counter04,
R.drawable.counter05,
R.drawable.counter06,
R.drawable.counter07,
R.drawable.counter08,
R.drawable.counter09
};
ImageView TopCounter;
ImageView BottomCounter;
public GameState()
{}
public void update() {
_ballX += _ballVelocityX;
_ballY += _ballVelocityY;
if( _ballY > _screenHeight){
_ballX = _screenWidth/2;
_ballY = _screenHeight/2;
TopCounter.setImageResource(myImageList[i+1]); //here is the error
_toppoint=_toppoint+1;
_topBatX =_screenWidth/2-10;
_bottomBatX =_screenWidth/2-10;
}
if( _ballY < 50){
_ballX = _screenWidth/2;
_ballY = _screenHeight/2;
BottomCounter.setImageResource(myImageList[i+1]);
_bottompoint=_bottompoint+1;
_topBatX =_screenWidth/2-10;
_bottomBatX =_screenWidth/2-10;
}
if (_toppoint==9){
}
else if (_bottompoint==9) {
}
if(_ballX > _screenWidth || _ballX <= 40){
_ballVelocityX *= -1;
}
if(_ballX > _topBatX && _ballX < _topBatX+_batLength && _ballY < _topBatY){
_ballVelocityY *= -1;
}
if(_ballX > _bottomBatX && _ballX < _bottomBatX+_batLength && _ballY > _bottomBatY){
_ballVelocityY *= -1;
}
if (_ballX == 40+_batLength) {
_topBatX=40;
} else if (_ballX > 40+_batLength && _ballX <= _screenWidth){
_topBatX=_ballX-_batLength+6;
}
if (_bottomBatX < 46) {
_bottomBatX=46;
} else if (_bottomBatX+_batLength > _screenWidth){
_bottomBatX=_screenWidth-_batLength+6;
}
}
public void draw(Canvas c, Paint paint) {
paint.setARGB(255, 234, 222, 199);
c.drawRect(new Rect(_ballX,_ballY,_ballX + _ballSize,_ballY + _ballSize), paint);
c.drawRect(new Rect(_topBatX, _topBatY, _topBatX + _batLength, _topBatY + _batHeight), paint); //top bat
c.drawRect(new Rect(_bottomBatX, _bottomBatY, _bottomBatX + _batLength, _bottomBatY + _batHeight), paint); //bottom bat
}
}
In my XML file:
<ImageView
android:id="#+id/counterT"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/counter00"
android:layout_gravity="left|center_vertical"
/>
<ImageView
android:id="#+id/counterB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/counter00" />
Can anybody help ?
I think this is your problem in GameState.java file
// under is matrix that contains images to my counter.
int[] myImageList = new int[]{
R.drawable.counter00,
R.drawable.counter01,
R.drawable.counter02,
R.drawable.counter03,
R.drawable.counter04,
R.drawable.counter05,
R.drawable.counter06,
R.drawable.counter07,
R.drawable.counter08,
R.drawable.counter09
};
this is not how you declare a Matrix! you want an array of integers
try to declare it as :
int[] myImageList = {
R.drawable.counter00,
R.drawable.counter01,
R.drawable.counter02,
R.drawable.counter03,
R.drawable.counter04,
R.drawable.counter05,
R.drawable.counter06,
R.drawable.counter07,
R.drawable.counter08,
R.drawable.counter09
};
EDIT:
if (TopCounter != null){
TopCounter.setImageResource(myImageList[i]);
i++;
}
also you don't increment you list index, it always equals 0, instead of that
initialize the index to 1 and then when you change the image source increment it by 1
but you'll also need to check that the index doesn't exceed the list size