I am new to opencv. I want to apply sobel filter on real time video using opencv in android but i am failed in doing so. when i use the built-in function of sobel in opencv it gives me the white blank screen.I have searched a lot but didn't find my error..
package com.example.bismanawaz.opencvpractice;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceView;
import android.view.WindowManager;
import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.CameraBridgeViewBase;
import org.opencv.android.LoaderCallbackInterface;
import org.opencv.android.OpenCVLoader;
import org.opencv.core.Mat;
import org.opencv.imgproc.Imgproc;
public class MainActivity extends Activity implements CameraBridgeViewBase.CvCameraViewListener2{
private CameraBridgeViewBase mOpenCvCameraView;
private Mat sobell;
public static final int CV_8UC1=0;
private static final String TAG ="OpenCV" ;
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
#Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i(TAG, "OpenCV loaded successfully");
mOpenCvCameraView.enableView();
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
#Override
public void onResume()
{
super.onResume();
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_7, this, mLoaderCallback);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.i(TAG, "called onCreate");
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.activity_main);
mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.HelloOpenCvView);
mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE);
mOpenCvCameraView.setCvCameraViewListener(this);
}
#Override
public void onPause()
{
super.onPause();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
public void onDestroy() {
super.onDestroy();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* This method is invoked when camera preview has started. After this method is invoked
* the frames will start to be delivered to client via the onCameraFrame() callback.
*
* #param width - the width of the frames that will be delivered
* #param height - the height of the frames that will be delivered
*/
#Override
public void onCameraViewStarted(int width, int height) {
sobell = new Mat();
}
/**
* This method is invoked when camera preview has been stopped for some reason.
* No frames will be delivered via onCameraFrame() callback after this method is called.
*/
#Override
public void onCameraViewStopped() {
}
/**
* This method is invoked when delivery of the frame needs to be done.
* The returned values - is a modified frame which needs to be displayed on the screen.
*
* #param inputFrame
*/
#Override
public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame) {
Imgproc.Sobel(inputFrame.gray(),sobell,CV_8UC1,1,1,3);
return sobell;
}
}
This is my method which is doing Sobel.
public static Mat FindSobelEdges(Mat mat) {
Imgproc.Sobel(mat, mat, CvType.CV_8UC1, 1, 1);
return mat;
}
I think your problem is wrong parameters. Pls check the Imgproc.Sobel doc:
Imgproc.Sobel
Related
I have a on/off switch called audio_switch. In my MainActivity file I want to look if the switch is on, if so, it should set a variable audio = 1. This piece of code mentioned can be found at the bottom of my MainActivity. On the very top after you can see I added a line to find my audio file. A few lines later I used an if(audio == 1) statement to check if the switch is on, so it will play the audio. This however does not work, it does however when I change the statement to audio == audio
package com.joeridukker.main;
import android.animation.ArgbEvaluator;
import android.animation.ObjectAnimator;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.preference.Preference;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;
import android.support.constraint.ConstraintLayout;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
public static int audio;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final MediaPlayer MansNotHot = MediaPlayer.create(this, R.raw.mans_not_hot);
if(audio == 1){
MansNotHot.start();
}
int secondsDelayed = 1;
Handler start = new Handler();
start.postDelayed(new Runnable() {
public void run() {
Animation wait = AnimationUtils.loadAnimation(getApplicationContext(),
R.anim.wait);
ConstraintLayout Entire = (ConstraintLayout) findViewById(R.id.Entire);
ImageView Logo = (ImageView) findViewById(R.id.Logo);
TextView Welcome = (TextView) findViewById(R.id.Welcome);
Welcome.startAnimation(wait);
Entire.startAnimation(wait);
Logo.startAnimation(wait);
// Actions to do after 10 seconds
}
}, 0);
Handler animation = new Handler();
animation.postDelayed(new Runnable() {
public void run() {
Animation slide_up = AnimationUtils.loadAnimation(getApplicationContext(),
R.anim.fade_and_slide_upwards);
Animation slide_down = AnimationUtils.loadAnimation(getApplicationContext(),
R.anim.fade_and_slide_downwards);
TextView Welcome = (TextView) findViewById(R.id.Welcome);
ImageView Logo = (ImageView) findViewById(R.id.Logo);
Logo.startAnimation(slide_down);
Welcome.startAnimation(slide_up);
// Actions to do after 10 seconds
}
}, 500);
Handler entire_animation = new Handler();
entire_animation.postDelayed(new Runnable() {
public void run() {
Animation fade_in = AnimationUtils.loadAnimation(getApplicationContext(),
R.anim.fade_in);
ConstraintLayout Entire = (ConstraintLayout) findViewById(R.id.Entire);
TextView Welcome = (TextView) findViewById(R.id.Welcome);
Entire.startAnimation(fade_in);
ObjectAnimator.ofObject(
Welcome,
"textColor",
new ArgbEvaluator(),
Color.argb(140,0,0,0),
Color.WHITE
).setDuration(500)
.start();
}
}, 500);
new Handler().postDelayed(new Runnable() {
public void run() {
Handler splash = new Handler();
int a = 1;
Intent Intent = new Intent(MainActivity.this, Differentiate.class);
Intent.putExtra("HEADER", a);
startActivity(Intent);
overridePendingTransition(R.anim.fade_in_switch_fast,R.anim.fade_out_switch_fast);
finish();
}
}, secondsDelayed * 2500);
}
public static class SettingsActivity extends PreferenceFragment {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Load the preferences from an XML resource
addPreferencesFromResource(R.xml.pref_general);
//Check the current value in preference.
SharedPreferences switchPrefStatus = PreferenceManager.getDefaultSharedPreferences(getActivity());
boolean switchPrefValue = switchPrefStatus.getBoolean("audio_switch", false);
Toast.makeText(getActivity(), "Current value: " + switchPrefValue, Toast.LENGTH_SHORT).show();
Preference switchPref = (Preference) findPreference("audio_switch");
switchPref.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
#Override
public boolean onPreferenceChange(Preference preference, Object o) {
boolean isOn = (boolean) o;
//Do what you want with the value!:)
if (isOn) {
audio = 1;
}else{
audio = 0;
}
return true;
}
});
}
}
}
My SettingsActivity
package com.joeridukker.main;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;
import android.preference.RingtonePreference;
import android.support.v4.app.NavUtils;
import android.support.v7.app.ActionBar;
import android.text.TextUtils;
import android.view.MenuItem;
import java.util.List;
/**
* A {#link PreferenceActivity} that presents a set of application settings. On
* handset devices, settings are presented as a single list. On tablets,
* settings are split by category, with category headers shown to the left of
* the list of settings.
* <p>
* See <a href="http://developer.android.com/design/patterns/settings.html">
* Android Design: Settings</a> for design guidelines and the <a
* href="http://developer.android.com/guide/topics/ui/settings.html">Settings
* API Guide</a> for more information on developing a Settings UI.
*/
public class SettingsActivity extends AppCompatPreferenceActivity {
/**
* A preference value change listener that updates the preference's summary
* to reflect its new value.
*/
private static Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() {
#Override
public boolean onPreferenceChange(Preference preference, Object value) {
String stringValue = value.toString();
if (preference instanceof ListPreference) {
// For list preferences, look up the correct display value in
// the preference's 'entries' list.
ListPreference listPreference = (ListPreference) preference;
int index = listPreference.findIndexOfValue(stringValue);
// Set the summary to reflect the new value.
preference.setSummary(
index >= 0
? listPreference.getEntries()[index]
: null);
} else if (preference instanceof RingtonePreference) {
// For ringtone preferences, look up the correct display value
// using RingtoneManager.
if (TextUtils.isEmpty(stringValue)) {
// Empty values correspond to 'silent' (no ringtone).
preference.setSummary(R.string.pref_ringtone_silent);
} else {
Ringtone ringtone = RingtoneManager.getRingtone(
preference.getContext(), Uri.parse(stringValue));
if (ringtone == null) {
// Clear the summary if there was a lookup error.
preference.setSummary(null);
} else {
// Set the summary to reflect the new ringtone display
// name.
String name = ringtone.getTitle(preference.getContext());
preference.setSummary(name);
}
}
} else {
// For all other preferences, set the summary to the value's
// simple string representation.
preference.setSummary(stringValue);
}
return true;
}
};
/**
* Helper method to determine if the device has an extra-large screen. For
* example, 10" tablets are extra-large.
*/
private static boolean isXLargeTablet(Context context) {
return (context.getResources().getConfiguration().screenLayout
& Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_XLARGE;
}
/**
* Binds a preference's summary to its value. More specifically, when the
* preference's value is changed, its summary (line of text below the
* preference title) is updated to reflect the value. The summary is also
* immediately updated upon calling this method. The exact display format is
* dependent on the type of preference.
*
* #see #sBindPreferenceSummaryToValueListener
*/
private static void bindPreferenceSummaryToValue(Preference preference) {
// Set the listener to watch for value changes.
preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);
// Trigger the listener immediately with the preference's
// current value.
sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
PreferenceManager
.getDefaultSharedPreferences(preference.getContext())
.getString(preference.getKey(), ""));
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setupActionBar();
}
/**
* Set up the {#link android.app.ActionBar}, if the API is available.
*/
private void setupActionBar() {
ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
// Show the Up button in the action bar.
actionBar.setDisplayHomeAsUpEnabled(true);
}
}
#Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
int id = item.getItemId();
if (id == android.R.id.home) {
if (!super.onMenuItemSelected(featureId, item)) {
NavUtils.navigateUpFromSameTask(this);
}
return true;
}
return super.onMenuItemSelected(featureId, item);
}
/**
* {#inheritDoc}
*/
#Override
public boolean onIsMultiPane() {
return isXLargeTablet(this);
}
/**
* {#inheritDoc}
*/
#Override
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
public void onBuildHeaders(List<Header> target) {
loadHeadersFromResource(R.xml.pref_headers, target);
}
/**
* This method stops fragment injection in malicious applications.
* Make sure to deny any unknown fragments here.
*/
protected boolean isValidFragment(String fragmentName) {
return PreferenceFragment.class.getName().equals(fragmentName)
|| GeneralPreferenceFragment.class.getName().equals(fragmentName)
|| DataSyncPreferenceFragment.class.getName().equals(fragmentName)
|| NotificationPreferenceFragment.class.getName().equals(fragmentName);
}
/**
* This fragment shows general preferences only. It is used when the
* activity is showing a two-pane settings UI.
*/
static int audio;
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
public static class GeneralPreferenceFragment extends PreferenceFragment {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.pref_general);
setHasOptionsMenu(true);
Preference switchPref = (Preference) findPreference("audio_switch");
switchPref.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
#Override
public boolean onPreferenceChange(Preference preference, Object o) {
boolean isOn = (boolean) o;
if (isOn) {
audio = 1;
}else{
audio = 0;
}
return true;
}
});
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == android.R.id.home) {
startActivity(new Intent(getActivity(), SettingsActivity.class));
return true;
}
return super.onOptionsItemSelected(item);
}
}
/**
* This fragment shows notification preferences only. It is used when the
* activity is showing a two-pane settings UI.
*/
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
public static class NotificationPreferenceFragment extends PreferenceFragment {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.pref_notification);
setHasOptionsMenu(true);
// Bind the summaries of EditText/List/Dialog/Ringtone preferences
// to their values. When their values change, their summaries are
// updated to reflect the new value, per the Android Design
// guidelines.
bindPreferenceSummaryToValue(findPreference("notifications_new_message_ringtone"));
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == android.R.id.home) {
startActivity(new Intent(getActivity(), SettingsActivity.class));
return true;
}
return super.onOptionsItemSelected(item);
}
}
/**
* This fragment shows data and sync preferences only. It is used when the
* activity is showing a two-pane settings UI.
*/
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
public static class DataSyncPreferenceFragment extends PreferenceFragment {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.pref_data_sync);
setHasOptionsMenu(true);
// Bind the summaries of EditText/List/Dialog/Ringtone preferences
// to their values. When their values change, their summaries are
// updated to reflect the new value, per the Android Design
// guidelines.
bindPreferenceSummaryToValue(findPreference("sync_frequency"));
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == android.R.id.home) {
startActivity(new Intent(getActivity(), SettingsActivity.class));
return true;
}
return super.onOptionsItemSelected(item);
}
}
}
I've been working on a project which uses wowza media engine to live stream on a website when video is taken through an android phone. But I'm unable to find the surfaceview as findviewbyId returns null.
imports
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.Window;
import android.view.WindowManager;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.support.v7.appcompat.R;
import edu.purdue.shishir.libs.Session;
import edu.purdue.shishir.libs.SessionBuilder;
import edu.purdue.shishir.libs.audio.AudioQuality;
import edu.purdue.shishir.libs.gl.SurfaceView;
import edu.purdue.shishir.libs.rtsp.RtspClient;
MainActivity.java
public class MainActivity extends AppCompatActivity implements RtspClient.Callback,
Session.Callback, SurfaceHolder.Callback {
// log tag
public final static String TAG = MainActivity.class.getSimpleName();
// surfaceview
private static SurfaceView mSurfaceView;
// Rtsp session
private Session mSession;
private static RtspClient mClient;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
// getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
requestWindowFeature(Window.FEATURE_NO_TITLE);
mSurfaceView = (SurfaceView) findViewById(R.id.surface);
mSurfaceView.getHolder().addCallback(this);
// Initialize RTSP client
initRtspClient();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
//getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
//if (id == R.id.action_settings) {
// return true;
//}
return super.onOptionsItemSelected(item);
}
private void toggleStreaming() {
if (!mClient.isStreaming()) {
// Start camera preview
mSession.startPreview();
// Start video stream
mClient.startStream();
} else {
// already streaming, stop streaming
// stop camera preview
mSession.stopPreview();
// stop streaming
mClient.stopStream();
}
}
private void initRtspClient() {
// Configures the SessionBuilder
mSession = SessionBuilder.getInstance()
.setContext(getApplicationContext())
.setAudioEncoder(SessionBuilder.AUDIO_NONE)
.setAudioQuality(new AudioQuality(8000, 16000))
.setVideoEncoder(SessionBuilder.VIDEO_H264)
.setSurfaceView(mSurfaceView).setPreviewOrientation(0)
.setCallback(this).build();
// Configures the RTSP client
mClient = new RtspClient();
mClient.setSession(mSession);
mClient.setCallback(this);
mSurfaceView.setAspectRatioMode(SurfaceView.ASPECT_RATIO_PREVIEW);
String ip, port, path;
// We parse the URI written in the Editext
Pattern uri = Pattern.compile("rtsp://(.+):(\\d+)/(.+)");
Matcher m = uri.matcher(AppConfig.STREAM_URL);
m.find();
ip = m.group(1);
port = m.group(2);
path = m.group(3);
mClient.setCredentials(AppConfig.PUBLISHER_USERNAME,
AppConfig.PUBLISHER_PASSWORD);
mClient.setServerAddress(ip, Integer.parseInt(port));
mClient.setStreamPath("/" + path);
}
private void alertError(final String msg) {
final String error = (msg == null) ? "Unknown error: " : msg;
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setMessage(error).setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
}
});
AlertDialog dialog = builder.create();
dialog.show();
}
#Override
protected void onResume() {
super.onResume();
toggleStreaming();
}
#Override
protected void onPause(){
super.onPause();
toggleStreaming();
}
#Override
public void onDestroy() {
super.onDestroy();
mClient.release();
mSession.release();
mSurfaceView.getHolder().removeCallback(this);
}
#Override
public void onSessionError(int reason, int streamType, Exception e) {
switch (reason) {
case Session.ERROR_CAMERA_ALREADY_IN_USE:
break;
case Session.ERROR_CAMERA_HAS_NO_FLASH:
break;
case Session.ERROR_INVALID_SURFACE:
break;
case Session.ERROR_STORAGE_NOT_READY:
break;
case Session.ERROR_CONFIGURATION_NOT_SUPPORTED:
break;
case Session.ERROR_OTHER:
break;
}
if (e != null) {
alertError(e.getMessage());
e.printStackTrace();
}
}
#Override
public void onRtspUpdate(int message, Exception exception) {
switch (message) {
case RtspClient.ERROR_CONNECTION_FAILED:
case RtspClient.ERROR_WRONG_CREDENTIALS:
alertError(exception.getMessage());
exception.printStackTrace();
break;
}
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
#Override
public void onBitrareUpdate(long bitrate) {
}
#Override
public void onPreviewStarted() {
}
#Override
public void onSessionConfigured() {
}
#Override
public void onSessionStarted() {
}
#Override
public void onSessionStopped() {
}
}
But R.id.surface cannot be resolved.
Activity_main.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/surface_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="#android:color/black"
tools:ignore="RtlHardcoded">
<edu.purdue.shishir.libs.gl.SurfaceView
android:id="#+id/surface"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" />
</FrameLayout>
you forgot to load the Activity_main.xml layout in the onCreate.
Please, add following code in onCreate
setContentView(R.layout.activity_main);
I'm working on a note recognition software, and, I use a Thread.sleep to ensure a pitch is consistent enough over a period to qualify as a note rather than noise. This seems to be making my app skip frames though, and pretty much breaks the program. How can I avoid this?
package com.example.miguel.guitartab;
import be.tarsos.dsp.AudioDispatcher;
import be.tarsos.dsp.AudioEvent;
import be.tarsos.dsp.io.android.AudioDispatcherFactory;
import be.tarsos.dsp.pitch.PitchDetectionHandler;
import be.tarsos.dsp.pitch.PitchDetectionResult;
import be.tarsos.dsp.pitch.PitchProcessor;
import be.tarsos.dsp.pitch.PitchProcessor.PitchEstimationAlgorithm;
import android.content.res.ColorStateList;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
private Song song = new Song();
private boolean finished = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tarsos_dsp);
AudioDispatcher dispatcher = AudioDispatcherFactory
.fromDefaultMicrophone(22050,1024,0);
dispatcher.addAudioProcessor(new PitchProcessor(PitchEstimationAlgorithm.FFT_YIN, 22050, 1024, new PitchDetectionHandler() {
#Override
public void handlePitch(final PitchDetectionResult pitchDetectionResult,
AudioEvent audioEvent) {
runOnUiThread(new Runnable() {
#Override
public void run() {
final float pitch = pitchDetectionResult.getPitch();
TextView text = (TextView) findViewById(R.id.textView1);
text.setText("" + pitch);
if (pitch>700) {
song = new Song();
finished = false;
} else if (finished){
text.setText("Song finished");
} else {
try{
Thread.sleep(80);
} catch (InterruptedException e) {
e.printStackTrace();
}
float pitch2 = pitchDetectionResult.getPitch();
if (pitch * 0.99 < pitch2 && pitch * 1.01 > pitch2) {
if (pitch + 2 > song.notes.get(0) && pitch - 2 < song.notes.get(0)) {
System.out.println("Found pitch: " +song.notes.get(0));
text.setTextColor(0xFF00FF00);
song.notes.remove(0);
if (song.notes.size()==0){
finished = true;
text.setTextColor(0xFFFF0000);
}
} else {
if (finished = true){
text.setTextColor(0xFFFF0000);
} else {
text.setTextColor(0xFF00FF00);
}
}
}
}
}
});
}
}));
new Thread(dispatcher,"Audio Dispatcher").start();
}
#Override
public void onBackPressed()
{
moveTaskToBack(true);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.tarsos_ds, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_tarsos_ds,
container, false);
return rootView;
}
}
}
I was trying to run some test on SurfaceViewer with SurfaceViewer having its own thread and everything worked just fine. Then I changed my code to change orientation of screen using setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
In the code below: I have an activity which uses Fragments. I have another class which extends SurfaceView class. Problem starts when I add setRequestedOrientation. After I add setRequestedOrientation. Value of running at in FastRender Class run method is always false. If I comment line with setRequestedOrientation , it runs fines.
package com.example.testpractise;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.content.res.AssetManager;
import android.graphics.Canvas;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
public class SurfaceViewTest extends ActionBarActivity {
static int counter;
static {
Log.i("Intializing class Surface Test","counter");
System.out.println("Statrting here");
}
#Override
protected void onRestart() {
// TODO Auto-generated method stub
super.onRestart();
counter++;
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
counter++;
Log.i("Counter vlase",String.valueOf(counter));
System.out.println("value of counter"+counter);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_surface_view_test);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.surface_view_test, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
FastRenderView renderView;
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//View rootView = inflater.inflate(
// R.layout.fragment_surface_view_test, container, false);
getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
BitmapCollection.initializeBitMapCollection(getActivity());
renderView = new FastRenderView(getActivity());
return renderView;
}
#Override
public void onResume() {
// TODO Auto-generated method stub
super.onResume();
renderView.resume();
}
#Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
renderView.pause();
}
static class FastRenderView extends SurfaceView implements Runnable {
Thread renderThread = null;
SurfaceHolder holder;
static volatile boolean running = false;
int x=0;
int y=0;
public FastRenderView(Context context) {
super(context);
// TODO Auto-generated constructor stub
holder = getHolder();
}
public void pause()
{
running = false;
while(true)
{
try{
renderThread.join();
}catch (InterruptedException i){
}
}
}
public void resume()
{
running = true;
renderThread = new Thread(this);
renderThread.setName("RendererThread");
renderThread.start();
running=true;
}
#Override
public void run() {
// TODO Auto-generated method stub
int sleepCounter=0;
while(!running)
{
try {
if(sleepCounter <5)
{
sleepCounter++;
Thread.sleep(5000);
}else{
break;
}
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
while(running)
{
if(!holder.getSurface().isValid())
{
continue;
}
Canvas canvas=holder.lockCanvas();
canvas.drawRGB(255, 0, 0);
holder.unlockCanvasAndPost(canvas);
}
}
}
}
}
Sorry if my question doesn't match the format. This is my first time. Any pointers on what is wrong and why would be greatly appreciated.
Thanks
If you just want to lock the Activity to landscape, you can do it in Manifest by adding the android:screenOrientation="landscape" attribute to the activity element.
I am trying to make a loop in Android app which is triggered by a button click.
After reading tips on making loops/delays on SO ( for example here), I decided to use message handler approach instead of Runnable.
In the code below, toastLoop() is executed and it prints "starting in x" seconds.
However, the message does not seem to be posted with that delay.
Or, the message is posted but the handler does not receive it.
I am a newbie and I am probably making a silly mistake somewhere.
What am I missing in the code below? Or is this code totally stupid?
package com.example.testapp;
import android.annotation.TargetApi;
import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.NavUtils;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;
public class ExecActivity extends FragmentActivity {
static Context context = null;
String LOG_TAG = "FTR";
static boolean test_status = false;
ToastLoop toast_loop;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_exec);
// Show the Up button in the action bar.
setupActionBar();
}
/**
* Set up the {#link android.app.ActionBar}, if the API is available.
*/
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
private void setupActionBar() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
getActionBar().setDisplayHomeAsUpEnabled(true);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.exec, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// This ID represents the Home or Up button. In the case of this
// activity, the Up button is shown. Use NavUtils to allow users
// to navigate up one level in the application structure. For
// more details, see the Navigation pattern on Android Design:
//
// http://developer.android.com/design/patterns/navigation.html#up-vs-back
//
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
class ToastLoop {
private final int loop_max_duration = 60; // in seconds
final int TOAST = 1;
Handler handler = new Handler() {
#Override
public void handleMessage(Message msg) {
Log.i(LOG_TAG, "Handler(): msg: " + msg.what);
switch (msg.what) {
case TOAST:
Toast.makeText( ExecActivity.this, "Doing my thing", Toast.LENGTH_SHORT).show();
if ( test_status) { // test is still running
toastLoop();
}
break;
default:
Toast.makeText(ExecActivity.this, "Unhandled", Toast.LENGTH_SHORT).show();
break;
}
}
};
public boolean toastLoop() {
if ( test_status) { // test is still running
long curr_time_milli = System.currentTimeMillis();
long window_position_sec = (long)( ((long)(curr_time_milli/1000))/loop_max_duration); // fraction discarded
long loop_start_time_sec = (window_position_sec + 1 ) * loop_max_duration;
long actual_start_time_milli = loop_start_time_sec * 1000;
Log.i(LOG_TAG, "toastLoop(): starting in " + ((actual_start_time_milli - curr_time_milli)/1000) );
Message msg = handler.obtainMessage( TOAST);
handler.sendMessageAtTime( msg, actual_start_time_milli );
return true;
}
return false;
}
}
public boolean beginTest( View view) {
Log.i(LOG_TAG, "in beginTest()");
test_status = true;
toast_loop = new ToastLoop();
toast_loop.toastLoop();
return true;
}
public boolean endTest( View view) {
Log.i(LOG_TAG, "in endTest()");
test_status = false;
return true;
}
}