Surface View and Linear layout and onClick event

Surface View and Linear layout and onClick event - android

I have a problem with adding my surface view to a linear layout, I have tried the already available answers and still cant seem to figure it out. My aim is to render an animation at the bottom of my login screen when my the next button is clicked. I tried adding a linear Layout to the Screen and then adding my gameView object on to that.
This is the loginActivity and game View Class for clarity I've also added the xml.
`package com.example.Combat;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.*;
import android.os.Bundle;
import android.util.Log;
import android.view.*;
import android.widget.LinearLayout;
import android.widget.TextView;
public class MyActivity extends Activity {
/**
* Called when the activity is first created.
*/
public GameView gameView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//setting the font
Typeface myTypeFace = Typeface.createFromAsset(getAssets(),"Typo Oxin free promo.ttf");
TextView myTextView = (TextView) findViewById(R.id.nameTextView);
myTextView.setTypeface(myTypeFace);
gameView = new GameView(this);
// LinearLayout.LayoutParams lp =new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
// lp.gravity= Gravity.BOTTOM;
LinearLayout myLayout = new LinearLayout(this);
myLayout.findViewById(R.id.gameLayoutView);
myLayout.addView(gameView);
}
#Override
public void onResume(){
super.onResume();
gameView.resume();
}
#Override
protected void onPause(){
super.onPause();
gameView.pause();
}
public void beginMotion(View view) {
GameView.isMoving=!GameView.isMoving;
// startActivity(new Intent(getApplicationContext(),transitionActivity.class));
}
}
`
package com.example.Combat;
import android.content.Context;
import android.graphics.*;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
/**
* Created by vmuser on 2017/05/05.
*/
public class GameView extends SurfaceView implements Runnable{
private Thread gameThread;
private SurfaceHolder ourHolder;
public static volatile boolean playing=false;
private Canvas canvas;
private Bitmap bitmapRunningMan;
public static boolean isMoving=false;
private float runSpeedPerSecond = 150;
//LinearLayout screen=(LinearLayout)findViewById(R.id.theScreen);
private float manXPos = 1020, manYPos = 950;
private int frameWidth = 230, frameHeight = 274;
private int frameCount = 6;
private int currentFrame = 0;
private long fps;
private long timeThisFrame;
private long lastFrameChangeTime = 0;
private int frameLengthInMillisecond = 60;
private Rect frameToDraw = new Rect(0, 0, frameWidth, frameHeight);
private RectF whereToDraw = new RectF(manXPos, manYPos, manXPos + frameWidth, frameHeight);
public GameView(Context context) {
super(context);
ourHolder = getHolder();
bitmapRunningMan = BitmapFactory.decodeResource(getResources(),
R.drawable.perfectsoldier);
bitmapRunningMan = Bitmap.createScaledBitmap(bitmapRunningMan,
frameWidth * frameCount, frameHeight, false);
}
#Override
public void run() {
while (playing) {
long startFrameTime = System.currentTimeMillis();
update();
this.draw();
Log.d("theOne","its Happennig");
timeThisFrame = System.currentTimeMillis() - startFrameTime;
if (timeThisFrame >= 1) {
fps = 1000 / timeThisFrame;
}
}
}
public void update() {
if (isMoving) {
manXPos = manXPos - runSpeedPerSecond / fps;
if (manXPos > 0) {
//manYPos += (int) frameHeight;
//manXPos = 10;
isMoving=false;
}
if (manYPos + frameHeight > 0) {
// manYPos = 10;
isMoving=false;
}
}
}
public void manageCurrentFrame() {
long time = System.currentTimeMillis();
if (isMoving) {
if (time > lastFrameChangeTime + frameLengthInMillisecond) {
lastFrameChangeTime = time;
currentFrame++;
if (currentFrame >= frameCount) {
currentFrame = 0;
}
}
}
frameToDraw.left = currentFrame * frameWidth;
frameToDraw.right = frameToDraw.left + frameWidth;
}
public void draw() {
if (ourHolder.getSurface().isValid()) {
canvas = ourHolder.lockCanvas();
canvas.drawColor(Color.WHITE);
whereToDraw.set((int) manXPos, (int) manYPos, (int) manXPos
+ frameWidth, (int) manYPos + frameHeight);
manageCurrentFrame();
canvas.drawBitmap(bitmapRunningMan, frameToDraw, whereToDraw, null);
ourHolder.unlockCanvasAndPost(canvas);
}
}
public void pause() {
playing = false;
try {
gameThread.join();
} catch(InterruptedException e) {
Log.e("ERR", "Joining Thread");
}
}
public void resume() {
playing = true;
gameThread = new Thread(this);
gameThread.start();
}
// public boolean onTouchEvent(MotionEvent event) {
// switch (event.getActionMasked() & MotionEvent.ACTION_MASK) {
// case MotionEvent.ACTION_DOWN :
// isMoving = !isMoving;
// break;
// }
//
// return true;
// }
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:focusableInTouchMode="true"
android:color="#000000"
android:weightSum="1" android:background="#ffffff" android:orientation="vertical"
android:id="#+id/theScreen">
<ImageView
android:layout_width="113dp"
android:layout_height="130dp"
android:src="#drawable/thelogo"
android:id="#+id/imageView" android:layout_gravity="center_horizontal"/>
<TextView
android:layout_width="145dp"
android:layout_height="49dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="combat"
android:textSize="30sp"
android:textColor="#000000"
android:id="#+id/nameTextView" android:layout_gravity="right" android:layout_weight="0.06"/>
<EditText
android:layout_width="270dp"
android:layout_height="wrap_content"
android:hint="Username"
android:textColorHint="#808080"
android:textColor="#22272a"
android:id="#+id/userNameEditText" android:layout_gravity="center_horizontal"/>
<Button
android:layout_width="261dp"
android:layout_height="wrap_content"
android:text="Next"
android:drawableRight="#drawable/thearrow"
android:textColor="#000000"
android:onClick="beginMotion"
android:id="#+id/NextButton" android:layout_gravity="center_horizontal" android:background="#638455"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Create an account"
android:id="#+id/textView" android:layout_gravity="center_horizontal" android:layout_weight="0.07"
android:textColor="#22272A"/>
<LinearLayout
android:id="#+id/gameLayoutView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
>
</LinearLayout>
</LinearLayout>

You haven't attached myLayout to the activity main layout that you earlier set on setContentView(R.layout.main).
Instead of:
LinearLayout myLayout = new LinearLayout(this);
myLayout.findViewById(R.id.gameLayoutView);
myLayout.addView(gameView);
You should write this:
LinearLayout myLayout = (LinearLayout) findViewById(R.id.gameLayoutView);
myLayout.addView(gameView);

Related

How to change a textview from a custom view's class

Let's say I have a custom view inside an activity and a TextView just below that custom view. I would like to change the TextView's text once the custom view was clicked but I seem to get a null pointer when I use findViewById(), so how can I do that?
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.yuvaleliav1gmail.quoridor_ye.MainActivity"
android:background="#dd7d23">
<com.yuvaleliav1gmail.quoridor_ye.ComBoardView
android:layout_width="900px"
android:layout_height="900px"
android:id="#+id/bview"
android:background="#drawable/game_board"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<RadioGroup
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/radioGroup"
android:layout_below="#+id/bview"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<RadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Move Pawn"
android:id="#+id/radioPawn"
android:checked="true"
android:onClick="radioButtonClick"/>
<RadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Set VERTICAL Wall"
android:id="#+id/verticalRdio"
android:checked="false"
android:onClick="radioButtonClick"/>
<RadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Set HORIZONTAL Wall"
android:id="#+id/horizontalRdio"
android:checked="false"
android:onClick="radioButtonClick"/>
</RadioGroup>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Your turn"
android:id="#+id/turnText34"
android:layout_gravity="center_horizontal"
android:layout_below="#+id/radioGroup"
android:layout_alignLeft="#+id/bview"
android:layout_alignStart="#+id/bview" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Your walls left: "
android:id="#+id/yourWallsText"
android:layout_gravity="center_horizontal"
android:layout_below="#+id/turnText34"
android:layout_alignLeft="#+id/turnText34"
android:layout_alignStart="#+id/turnText34" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="10"
android:id="#+id/yourNumText"
android:layout_gravity="center_horizontal"
android:layout_alignTop="#+id/yourWallsText"
android:layout_toRightOf="#+id/yourWallsText"
android:layout_toEndOf="#+id/yourWallsText" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Opponent&apos;s walls left:"
android:id="#+id/opWallsText"
android:layout_gravity="center_horizontal"
android:layout_below="#+id/yourWallsText"
android:layout_alignLeft="#+id/yourWallsText"
android:layout_alignStart="#+id/yourWallsText" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="10"
android:id="#+id/opNumText"
android:layout_gravity="center_horizontal"
android:layout_alignTop="#+id/opWallsText"
android:layout_toRightOf="#+id/opWallsText"
android:layout_toEndOf="#+id/opWallsText" />
</RelativeLayout>
comBoardView is the custom view's class
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.os.CountDownTimer;
import android.os.Handler;
import android.util.AttributeSet;
import android.view.Display;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;
import android.widget.Toast;
public class ComBoardView extends View {
private static final int ROWS = 9;
private static final int COLUMNS = 9;
public static Context con;
Paint paint;
GameService game;
TextView turns;
public static Point size = new Point();
/*
* constructor
*/
public ComBoardView(Context context, AttributeSet attrs) {
super(context, attrs);
con = context;
paint = new Paint();
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
display.getSize(size);
turns = (TextView) findViewById(R.id.turnText34);
}
/*
*/
public boolean onTouchEvent( MotionEvent event ) {
game = GameService.getInstance();
int x = (int)event.getX() / 100;
int y = (int)event.getY() / 100;
if ( event.getAction() != MotionEvent.ACTION_UP )
return true;
if(game.movePawn){
if(game.turn % 2 == 0){
if(game.isLegalMove(game.ai.MyLocation , y * ROWS + x)){
game.board.ClrPlayer(game.ai);
game.ai.MyLocation = y * ROWS + x;
game.board.SetPlayer(game.ai);
if(turns != null){
turns.setText("white's turn");
}
game.turn++;
}
}
else{
if(game.isLegalMove(game.player.MyLocation , y * ROWS + x)){
game.board.ClrPlayer(game.player);
game.player.MyLocation = y * ROWS + x;
game.board.SetPlayer(game.player);
if(turns != null){
turns.setText("black's turn");
}
game.turn++;
}
}
}
else {
if(((int)event.getX() % 100) < 50) x--;
if(((int)event.getY() % 100) < 50) y--;
if(game.setHWall){
game.board.SetHWall(y,x);
game.turn++;
}
else{
game.board.SetVWall(y,x);
game.turn++;
}
}
return true;
}
public void RestartTimer() {
new CountDownTimer(3500, 1000) {
public void onTick(long millisUntilFinished) {
final Toast toast = Toast.makeText(con, "restarting in: " + millisUntilFinished / 1000, Toast.LENGTH_LONG);
toast.show();
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
toast.cancel();
}
}, 1000);
}
public void onFinish() {
}
}.start();
}
protected void onDraw(Canvas canvas) {
paint.setAntiAlias(true);
paint.setColor(Color.BLACK);
GameService.getInstance().onDraw(canvas, paint);
}
}
and game is the activity's class
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.RadioButton;
import java.util.Timer;
public class Game extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_game);
Timer timer = new Timer();
GameUpdateTimer ut = new GameUpdateTimer();
ut.boardView = (ComBoardView)this.findViewById(R.id.bview);
timer.schedule(ut, 200, 200);
RadioButton pawn = (RadioButton)findViewById(R.id.radioPawn);
RadioButton hWall = (RadioButton)findViewById(R.id.horizontalRdio);
RadioButton vWall = (RadioButton)findViewById(R.id.verticalRdio);
final GameService g = GameService.getInstance();
pawn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
g.movePawn = true;
g.setHWall = false;
}});
hWall.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
g.movePawn = false;
g.setHWall = true;
}
});
vWall.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
g.movePawn = false;
g.setHWall = false;
}
});
}
}

You can't call turns = (TextView) findViewById(R.id.turnText34); from your custom view, it will always return Null because TextView exist in the activity xml and not in ComBoardView.
What you can do, is to instantiate your TextView in the activity, then add a clickListener to your ComBoardView.
TextView turns;
#Override
protected void onCreate(Bundle savedInstanceState) {
//...
turns = (TextView) findViewById(R.id.turnText34);
ut.boardView.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
turns.setText("ComBoardView was clicked!");
}});
//...
}

RefreshableListView cannot be cast to ListView Error (Pull to Refresh)

Im getting an error trying to implement Refreshable Listview. What is producing this error? I might be overlooking something.. Thanks in advance.
10-10 19:01:28.815 17274-17274/? E/AndroidRuntime﹕ FATAL EXCEPTION:
main java.lang.RuntimeException: Unable to start activity
ComponentInfo{nl.rss.foit.myapplication/nl.rss.foit.myapplication.MyActivity}:
java.lang.ClassCastException: android.widget.ListView cannot be cast
to nl.rss.foit.myapplication.Refresh.RefreshableListView
RefreshableInterface.java
public interface RefreshableInterface {
public void startFresh();
public void startLoadMore();
}
RefreshableListView.Java
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;
import java.text.SimpleDateFormat;
import java.util.Date;
import nl.rss.foit.myapplication.R;
public class RefreshableListView extends ListView implements OnScrollListener {
private final int HEADER_HEIGHT = 60;
private final int HEADER_TOP = 10;
private final int STATE_PULL_TO_REFRESH = 0;
private final int STATE_RELEASE_TO_UPDATE = 1;
private int currentState;
private ImageView arrowImage;
private ProgressBar progressBar;
private TextView headerTextView;
private TextView lastUpdateDateTextView;
private LinearLayout headerRelativeLayout;
private RotateAnimation rotateAnimation;
private RotateAnimation reverseRotateAnimation;
private RefreshableInterface refreshDelegate;
private RelativeLayout footerLayout;
private ProgressBar footerProgressBar;
private boolean isLoadingMore;
private boolean isLoading;
//private boolean isDragging;
private float startY;
private float deltaY;
public RefreshableListView(Context context) {
super(context);
// TODO Auto-generated constructor stub
init(context);
}
public RefreshableListView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
#Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
// TODO Auto-generated method stub
Log.d("debug", "debug");
}
#Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// TODO Auto-generated method stub
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
// TODO Auto-generated method stub
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
//isDragging = true;
startY = ev.getY();
break;
case MotionEvent.ACTION_MOVE:
if (!isLoading) {
deltaY = ev.getY() - startY;
Log.d("debug", String.valueOf(deltaY));
headerRelativeLayout.setPadding(
headerRelativeLayout.getPaddingLeft(), -1
* HEADER_HEIGHT + (int) deltaY, 0,
headerRelativeLayout.getPaddingBottom());
if(headerRelativeLayout.getPaddingTop() >= HEADER_HEIGHT && currentState == STATE_PULL_TO_REFRESH) {
//change state
currentState = STATE_RELEASE_TO_UPDATE;
arrowImage.clearAnimation();
arrowImage.startAnimation(rotateAnimation);
headerTextView.setText(R.string.release_to_refresh);
} else if (headerRelativeLayout.getPaddingTop() < HEADER_HEIGHT && currentState == STATE_RELEASE_TO_UPDATE) {
currentState = STATE_PULL_TO_REFRESH;
arrowImage.clearAnimation();
arrowImage.startAnimation(reverseRotateAnimation);
headerTextView.setText(R.string.pull_to_refresh);
}
}
break;
case MotionEvent.ACTION_UP:
//isDragging = false;
if (!isLoading) {
if (headerRelativeLayout.getPaddingTop() < HEADER_HEIGHT) {
// come back
headerRelativeLayout.setPadding(
headerRelativeLayout.getPaddingLeft(), -1
* HEADER_HEIGHT, 0,
headerRelativeLayout.getPaddingBottom());
} else {
// come to HEADER_HEIGHT and start the trigger
headerRelativeLayout.setPadding(
headerRelativeLayout.getPaddingLeft(), HEADER_TOP, 0,
headerRelativeLayout.getPaddingBottom());
headerTextView.setText(R.string.loading);
progressBar.setVisibility(View.VISIBLE);
arrowImage.clearAnimation();
arrowImage.setVisibility(View.GONE);
//START LOADING
isLoading = true;
if (refreshDelegate != null) {
refreshDelegate.startFresh();
}
}
}
break;
default:
break;
}
return super.onTouchEvent(ev);
}
private void init(Context context) {
headerRelativeLayout = (LinearLayout) inflate(context,
R.layout.refresh_header_view, null);
arrowImage = (ImageView) headerRelativeLayout
.findViewById(R.id.head_arrowImageView);
progressBar = (ProgressBar) headerRelativeLayout
.findViewById(R.id.head_progressBar);
headerTextView = (TextView) headerRelativeLayout
.findViewById(R.id.head_tipsTextView);
headerTextView.setText(R.string.pull_to_refresh);
lastUpdateDateTextView = (TextView) headerRelativeLayout
.findViewById(R.id.head_lastUpdatedDateTextView);
lastUpdateDateTextView.setText("");
headerRelativeLayout.setPadding(headerRelativeLayout.getPaddingLeft(),
-1 * HEADER_HEIGHT, 0, headerRelativeLayout.getPaddingBottom());
this.addHeaderView(headerRelativeLayout, null, false);
footerLayout = (RelativeLayout) inflate(context, R.layout.refresh_footer_view, null);
footerProgressBar = (ProgressBar)footerLayout.findViewById(R.id.footer_progressBar);
footerLayout.setOnClickListener(loadMoreClickListener);
this.addFooterView(footerLayout, null, false);
isLoadingMore = false;
//isDragging = false;
currentState = STATE_PULL_TO_REFRESH;
this.setOnScrollListener(this);
rotateAnimation = new RotateAnimation(0, -180,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
rotateAnimation.setInterpolator(new LinearInterpolator());
rotateAnimation.setDuration(250);
rotateAnimation.setFillAfter(true);
reverseRotateAnimation = new RotateAnimation(-180, 0,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
reverseRotateAnimation.setInterpolator(new LinearInterpolator());
reverseRotateAnimation.setDuration(1);
reverseRotateAnimation.setFillAfter(true);
}
private OnClickListener loadMoreClickListener = new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (!isLoadingMore) {
isLoadingMore = true;
footerProgressBar.setVisibility(View.VISIBLE);
refreshDelegate.startLoadMore();
}
}
};
public void onRefreshComplete() {
progressBar.setVisibility(View.GONE);
arrowImage.setVisibility(View.VISIBLE);
arrowImage.startAnimation(reverseRotateAnimation);
headerRelativeLayout.setPadding(headerRelativeLayout.getPaddingLeft(),
-1 * HEADER_HEIGHT, 0, headerRelativeLayout.getPaddingBottom());
SimpleDateFormat format =new SimpleDateFormat("MMM dd, yyyy HH:mm:ss");
String date=format.format(new Date());
lastUpdateDateTextView.setText("Last Updated: " + date);
isLoading = false;
//isDragging = false;
}
public void onRefreshStart() {
headerRelativeLayout.setPadding(headerRelativeLayout.getPaddingLeft(),
HEADER_TOP, 0, headerRelativeLayout.getPaddingBottom());
headerTextView.setText(R.string.loading);
progressBar.setVisibility(View.VISIBLE);
arrowImage.setVisibility(View.GONE);
isLoading = true;
if (refreshDelegate != null) {
refreshDelegate.startFresh();
}
}
public void setOnRefresh(RefreshableInterface d){
refreshDelegate = d;
}
public void onLoadingMoreComplete() {
footerProgressBar.setVisibility(View.GONE);
isLoadingMore = false;
}
}
Layout
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<ListView
android:id="#+id/postListView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</RelativeLayout>

On your layout:
<ListView
android:id="#+id/postListView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
Shouldn't you be doing this instead?
<RefreshableListView
android:id="#+id/postListView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />

you are using a plain ListView which can not be casted to RefreshableListView. To fix change your layout as follows:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<com.package.RefreshableListView
android:id="#+id/postListView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</RelativeLayout>
You have to change com.package., with the package of RefreshableListView

Adding drawable image to background of canvas

I know its possible to paint the background of canvas using
mPaint = new Paint();
mPaint.setColor(Color.RED);
Im just wondering how to i set a permanent background for it. Ive tried using the xml file but nothing happens. Any ideas?
This is the source code of the project, ive been following a tutorial how to do it because im fairly unfamiliar with bitmaps.
Canvas Class
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;
public class GameBoard extends View{
private int mFlagX = -1;
private int mFlagY = -1;
private Bitmap mBitmap = null;
private Bitmap nBitmap = null;
private Paint mPaint = null;
private boolean isFlagHidden = false;
private int mBoundX = -1;
private int mBoundY = -1;
//play with these values to make the app more or less challenging
public final int CLOSER = 50;
public final int CLOSE = 100;
public GameBoard(Context context, AttributeSet aSet) {
super(context, aSet);
//load our bitmap
mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.star);
//create a paint brush
mPaint = new Paint();
mPaint.setColor(Color.RED);
}
#Override
public void onDraw(Canvas canvas) {
//initialize
if ((mFlagX < 1) || (mFlagY < 1)) {
mFlagX = (int) (getWidth() / 2) - mBitmap.getWidth() / 2;
mFlagY = (int) (getHeight() / 2) - mBitmap.getHeight() / 2;
mBoundX = (int)getWidth() - mBitmap.getWidth();
mBoundY = (int)getHeight() - mBitmap.getHeight();
}
//draw background
canvas.drawRect(0, 0, getWidth(), getHeight(), mPaint);
//draw the flag
if (!isFlagHidden) {
canvas.drawBitmap(mBitmap, mFlagX, mFlagY, null);
}
}
public void hideTheFlag(){
//randomize flag location
mFlagX = (int) Math.ceil(Math.random() * mBoundX);
mFlagY = (int) Math.ceil(Math.random() * mBoundY);
isFlagHidden = true;
//force redraw
invalidate();
}
public void giveUp(){
isFlagHidden = false;
//force redraw
invalidate();
}
public Indicators takeAGuess(float x, float y) {
//this is our "warm" area
Rect prettyClose = new Rect(mFlagX - CLOSE, mFlagY - CLOSE, mFlagX+mBitmap.getWidth() + CLOSE, mFlagY+mBitmap.getHeight() + CLOSE);
//normalize
if (prettyClose.left < 0) prettyClose.left = 0;
if (prettyClose.top < 0) prettyClose.top = 0;
if (prettyClose.right > mBoundX) prettyClose.right = mBoundX;
if (prettyClose.bottom > mBoundY) prettyClose.bottom = mBoundY;
//this is our "hot" area
Rect reallyClose = new Rect(mFlagX - CLOSER, mFlagY - CLOSER, mFlagX+mBitmap.getWidth() + CLOSER, mFlagY+mBitmap.getHeight() + CLOSER);
//normalize
if (reallyClose.left < 0) reallyClose.left = 0;
if (reallyClose.top < 0) reallyClose.top = 0;
if (reallyClose.right > mBoundX) reallyClose.right = mBoundX;
if (reallyClose.bottom > mBoundY) reallyClose.bottom = mBoundY;
//this is the area that contains our flag
Rect bullsEye = new Rect(mFlagX, mFlagY, mFlagX+mBitmap.getWidth(), mFlagY+mBitmap.getHeight());
//check to see where on the board the user pressed
if (bullsEye.contains((int) x, (int)y)) {
//found it
isFlagHidden = false;
invalidate();
return Indicators.BULLSEYE;
} else if (reallyClose.contains((int) x, (int)y)) {
//hot
return Indicators.HOT;
} else if (prettyClose.contains((int)x, (int)y)) {
//warm
return Indicators.WARM;
} else {
//not even close
return Indicators.COLD;
}
}
}
Game Class
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.Button;
import android.widget.TextView;
public class FindTheStar extends Activity implements OnTouchListener, OnClickListener{
private GameBoard mGameBoard = null;
private boolean isFlagHidden = false;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_star);
mGameBoard = (GameBoard) findViewById(R.id.Hide_canvas);
mGameBoard.setOnTouchListener(this);
Button b = (Button) findViewById(R.id.the_button);
b.setOnClickListener(this);
}
#Override
public boolean onTouch(View v, MotionEvent event) {
if (v.getId() == R.id.Hide_canvas) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
if (isFlagHidden) {
TextView tv = (TextView)findViewById (R.id.the_label);
switch (mGameBoard.takeAGuess(event.getX(), event.getY())) {
case BULLSEYE:
Button b = (Button) findViewById(R.id.the_button);
isFlagHidden = false;
b.setText("Go Hide!");
tv.setText("You found me!");
tv.setTextColor(Color.GREEN);
break;
case HOT:
tv.setText("You're hot!");
tv.setTextColor(Color.RED);
break;
case WARM:
tv.setText("Getting warm...");
tv.setTextColor(Color.YELLOW);
break;
case COLD:
tv.setText("You're cold.");
tv.setTextColor(Color.BLUE);
break;
}
}
}
return true;
}
return false;
}
#Override
public void onClick(View v) {
if (v.getId() == R.id.the_button) {
TextView tv = (TextView)findViewById (R.id.the_label);
tv.setText("");
Button b = (Button) findViewById(R.id.the_button);
isFlagHidden = !isFlagHidden;
if (isFlagHidden) {
b.setText("Can't find me?");
mGameBoard.hideTheFlag();
} else {
b.setText("Go Hide!");
mGameBoard.giveUp();
}
}
}
}
XML File
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="#+id/the_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:textSize="20sp"
android:layout_marginBottom="10dip"
android:text="Lets Play Hide and Seek!"/>
<Button
android:id="#+id/the_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:layout_marginBottom="10dip"
android:text="Go Hide!"/>
<app.autismapp.GameBoard
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/Hide_canvas"/>
</LinearLayout>

yes you can set your permanent background using xml layout..i done this by creating two class.
this is my code in MainACtivity
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final BrushView view=new BrushView(this);
setContentView(R.layout.mylayout);//removed this one if the paint doesnt work
view.setBackgroundResource(R.drawable.background);//to set background
setContentView(view);// to display the background
and my second class
public class PaintView extends View {
private Paint paint = new Paint();
public LayoutParams params;
public PaintView(Context context) {
super(context);
paint.setAntiAlias(true);
paint.setColor(Color.BLUE);
i hope it gives you an idea

Custom designed view disappeared while using ScrollView

I am using one custom designed CalendarView in Android. While I am using Scrollview in the layout, the custom designed CalendarView is not getting displayed in the screen.
what could cause the CalendarView to disappear?
My layout is:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<Button
android:id="#+id/NextMonth"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:text="#string/NextMonth" />
<Button
android:id="#+id/PreviousMonth"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:text="#string/PreviousMonth" />
<TextView
android:id="#+id/MonthText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:text="Month" />
<TextView
android:id="#+id/SundayText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/PreviousMonth"
android:layout_marginLeft="25dp"
android:text="#string/SundayText"
android:textSize="10sp" />
<TextView
android:id="#+id/MondayText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/PreviousMonth"
android:layout_marginLeft="22dp"
android:layout_toRightOf="#+id/SundayText"
android:text="#string/MondayText"
android:textSize="10sp" />
<TextView
android:id="#+id/TuesdayText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/PreviousMonth"
android:layout_marginLeft="20dp"
android:layout_toRightOf="#+id/MondayText"
android:text="#string/Tuesday"
android:textSize="10sp" />
<TextView
android:id="#+id/WednesdayText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/PreviousMonth"
android:layout_marginLeft="22dp"
android:layout_toRightOf="#+id/TuesdayText"
android:text="#string/Wednesday"
android:textSize="10sp" />
<TextView
android:id="#+id/Thursday"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/PreviousMonth"
android:layout_marginLeft="20dp"
android:layout_toRightOf="#+id/WednesdayText"
android:text="#string/ThurdayText"
android:textSize="10sp" />
<TextView
android:id="#+id/Friday"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/PreviousMonth"
android:layout_marginLeft="22dp"
android:layout_toRightOf="#+id/Thursday"
android:text="#string/FridayText"
android:textSize="10sp" />
<TextView
android:id="#+id/Saturday"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/PreviousMonth"
android:layout_marginLeft="27dp"
android:layout_toRightOf="#+id/Friday"
android:text="#string/SaturdayText"
android:textSize="10sp" />
<com.example.calendar_module.CalendarView
android:id="#+id/calendar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/NextMonth" />
</RelativeLayout>
</ScrollView>
My CalenderView Class file :
package com.example.calendar_module;
import java.util.Calendar;
import android.app.ActionBar.LayoutParams;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.MonthDisplayHelper;
import android.view.MotionEvent;
import android.widget.ImageView;
public class CalendarView extends ImageView {
private static int WEEK_TOP_MARGIN = 0;
private static int WEEK_LEFT_MARGIN = 05;
private static int CELL_WIDTH = 20;
private static int CELL_HEIGH = 20;
private static int CELL_MARGIN_TOP = 05;
private static int CELL_MARGIN_LEFT = 29;
private static float CELL_TEXT_SIZE;
private static final String TAG = "CalendarView";
private String[] mDayString = {"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
private Calendar mRightNow = null;
private Drawable mWeekTitle = null;
private Cell mToday = null;
private Cell[][] mCells = new Cell[6][7];
private Cell[] mDayCells = new Cell[7];
private OnCellTouchListener mOnCellTouchListener = null;
MonthDisplayHelper mHelper;
Drawable mDecoration = null;
public interface OnCellTouchListener {
public void onTouch(Cell cell);
}
public CalendarView(Context context) {
this(context, null);
}
public CalendarView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CalendarView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mDecoration = context.getResources().getDrawable(R.drawable.typeb_calendar_today);
initCalendarView();
}
private void initCalendarView() {
mRightNow = Calendar.getInstance();
// prepare static vars
Resources res = getResources();
WEEK_TOP_MARGIN = (int) res.getDimension(R.dimen.week_top_margin);
WEEK_LEFT_MARGIN = (int) res.getDimension(R.dimen.week_left_margin);
CELL_WIDTH = (int) res.getDimension(R.dimen.cell_width);
CELL_HEIGH = (int) res.getDimension(R.dimen.cell_heigh);
CELL_MARGIN_TOP = (int) res.getDimension(R.dimen.cell_margin_top);
CELL_MARGIN_LEFT = (int) res.getDimension(R.dimen.cell_margin_left);
CELL_TEXT_SIZE = res.getDimension(R.dimen.cell_text_size);
// set background
// setImageResource(R.drawable.background);
mWeekTitle = res.getDrawable(R.drawable.calendar_week);
mHelper = new MonthDisplayHelper(mRightNow.get(Calendar.YEAR), mRightNow.get(Calendar.MONTH));
}
private void initCells() {
class _calendar {
public int day;
public boolean thisMonth;
public _calendar(int d, boolean b) {
day = d;
thisMonth = b;
}
public _calendar(int d) {
this(d, false);
}
};
_calendar tmp[][] = new _calendar[6][7];
for(int i=0; i<tmp.length; i++) {
int n[] = mHelper.getDigitsForRow(i);
for(int d=0; d<n.length; d++) {
if(mHelper.isWithinCurrentMonth(i,d))
tmp[i][d] = new _calendar(n[d], true);
else
tmp[i][d] = new _calendar(n[d]);
}
}
Calendar today = Calendar.getInstance();
int thisDay = 0;
mToday = null;
if(mHelper.getYear()==today.get(Calendar.YEAR) && mHelper.getMonth()==today.get(Calendar.MONTH)) {
thisDay = today.get(Calendar.DAY_OF_MONTH);
}
// // build cells
Rect Bound = new Rect(CELL_MARGIN_LEFT, CELL_MARGIN_TOP, CELL_WIDTH+CELL_MARGIN_LEFT, CELL_HEIGH+CELL_MARGIN_TOP);
// for( int i=0 ; i < 7 ; i++ )
// {
//
// mDayCells[i] = new Cell(mDayString[i],new Rect(Bound),CELL_TEXT_SIZE);
// Bound.offset(CELL_WIDTH, 0);
//
// }
//
// Bound.offset(0, CELL_HEIGH); // move to next row and first column
// Bound.left = CELL_MARGIN_LEFT;
// Bound.right = CELL_MARGIN_LEFT+CELL_WIDTH;
//
for(int week=0; week<mCells.length; week++) {
for(int day=0; day<mCells[week].length; day++)
{
if(tmp[week][day].thisMonth) {
if(day==0 || day==6 )
mCells[week][day] = new RedCell(tmp[week][day].day, new Rect(Bound), CELL_TEXT_SIZE);
else
mCells[week][day] = new Cell(tmp[week][day].day, new Rect(Bound), CELL_TEXT_SIZE);
} else {
mCells[week][day] = new GrayCell(tmp[week][day].day, new Rect(Bound), CELL_TEXT_SIZE);
}
Bound.offset(CELL_WIDTH, 0); // move to next column
// get today
if(tmp[week][day].day==thisDay && tmp[week][day].thisMonth) {
mToday = mCells[week][day];
mDecoration.setBounds(mToday.getBound());
}
}
Bound.offset(0, CELL_HEIGH); // move to next row and first column
Bound.left = CELL_MARGIN_LEFT;
Bound.right = CELL_MARGIN_LEFT+CELL_WIDTH;
}
}
#Override
public void onLayout(boolean changed, int left, int top, int right, int bottom) {
// Rect re = getDrawable().getBounds();
// WEEK_LEFT_MARGIN = CELL_MARGIN_LEFT = (right-left - re.width()) / 2;
// mWeekTitle.setBounds(WEEK_LEFT_MARGIN, WEEK_TOP_MARGIN, WEEK_LEFT_MARGIN+mWeekTitle.getMinimumWidth(), WEEK_TOP_MARGIN+mWeekTitle.getMinimumHeight());
initCells();
super.onLayout(changed, left, top, right, bottom);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
setMeasuredDimension(CELL_WIDTH, CELL_HEIGH);
}
public void setTimeInMillis(long milliseconds) {
mRightNow.setTimeInMillis(milliseconds);
initCells();
this.invalidate();
}
public int getYear() {
return mHelper.getYear();
}
public int getMonth() {
return mHelper.getMonth();
}
public void nextMonth() {
mHelper.nextMonth();
initCells();
invalidate();
}
public void previousMonth() {
mHelper.previousMonth();
initCells();
invalidate();
}
public boolean firstDay(int day) {
return day==1;
}
public boolean lastDay(int day) {
return mHelper.getNumberOfDaysInMonth()==day;
}
public void goToday() {
Calendar cal = Calendar.getInstance();
mHelper = new MonthDisplayHelper(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH));
initCells();
invalidate();
}
public Calendar getDate() {
return mRightNow;
}
#Override
public boolean onTouchEvent(MotionEvent event) {
if(mOnCellTouchListener!=null){
for(Cell[] week : mCells) {
for(Cell day : week) {
if(day.hitTest((int)event.getX(), (int)event.getY())) {
mOnCellTouchListener.onTouch(day);
}
}
}
}
return super.onTouchEvent(event);
}
public void setOnCellTouchListener(OnCellTouchListener p) {
mOnCellTouchListener = p;
}
#Override
protected void onDraw(Canvas canvas) {
// draw background
super.onDraw(canvas);
mWeekTitle.draw(canvas);
// draw cells
for(Cell[] week : mCells) {
for(Cell day : week) {
day.draw(canvas);
}
}
// draw today
if(mDecoration!=null && mToday!=null) {
mDecoration.draw(canvas);
}
}
public class GrayCell extends Cell {
public GrayCell(int dayOfMon, Rect rect, float s) {
super(dayOfMon, rect, s);
mPaint.setColor(Color.LTGRAY);
}
}
private class RedCell extends Cell {
public RedCell(int dayOfMon, Rect rect, float s) {
super(dayOfMon, rect, s);
mPaint.setColor(0xdddd0000);
}
}
}

I think, height of your custom view equals == 0. try to log it. If it is right just override onMeasure and set size for your view.
And esle : why in xml height == match_parent? Can you imagine how it looks in ScrollView?)
UPD: Ok, in your case height == 0. You must override onMeasure() method in your custom view like this :
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
setMeasuredDimension(WIDTH, HEIGHT);
}
Where width and height values in pixels.
Good luck!

how i change result text view position from top left to any other location?

just tell me how i change text view position in this code? in this app application show result textview at top left position of application how to i change is position to botton center or right side i try layout position in xml but is always show on top left result barcode value on same location where button present and button overlap resultText view value s o how can i change textview position?????
package com.zijunlin.Zxing.Demo;
import java.io.IOException;
import java.util.Vector;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;
import com.zijunlin.Zxing.Demo.camera.CameraManager;
import com.zijunlin.Zxing.Demo.decoding.CaptureActivityHandler;
import com.zijunlin.Zxing.Demo.decoding.InactivityTimer;
import com.zijunlin.Zxing.Demo.view.ViewfinderView;
import android.R.string;
import android.app.Activity;
import android.content.res.AssetFileDescriptor;
import android.graphics.Bitmap;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.os.Handler;
import android.os.Vibrator;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class CaptureActivity extends Activity implements Callback {
private CaptureActivityHandler handler;
private ViewfinderView viewfinderView;
private boolean hasSurface;
private Vector<BarcodeFormat> decodeFormats;
private String characterSet;
public static TextView txtResult;
private InactivityTimer inactivityTimer;
private MediaPlayer mediaPlayer;
private boolean playBeep;
private static final float BEEP_VOLUME = 0.10f;
private boolean vibrate;
private static String barCode;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//³õÊ¼»¯ CameraManager
CameraManager.init(getApplication());
viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
txtResult = (TextView) findViewById(R.id.txtResult);
Button mybutton = (Button) findViewById(R.id.button1);
mybutton.setOnClickListener(new OnClickListener() {
public void onClick(View v)
{
Toast.makeText(CaptureActivity.this,""+barCode,
Toast.LENGTH_LONG).show();
}
});
hasSurface = false;
inactivityTimer = new InactivityTimer(this);
}
#Override
protected void onResume() {
super.onResume();
SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
SurfaceHolder surfaceHolder = surfaceView.getHolder();
if (hasSurface) {
initCamera(surfaceHolder);
} else {
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
decodeFormats = null;
characterSet = null;
playBeep = true;
AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE);
if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {
playBeep = false;
}
initBeepSound();
vibrate = true;
}
#Override
protected void onPause() {
super.onPause();
if (handler != null) {
handler.quitSynchronously();
handler = null;
}
CameraManager.get().closeDriver();
}
#Override
protected void onDestroy() {
inactivityTimer.shutdown();
super.onDestroy();
}
private void initCamera(SurfaceHolder surfaceHolder) {
try {
CameraManager.get().openDriver(surfaceHolder);
} catch (IOException ioe) {
return;
} catch (RuntimeException e) {
return;
}
if (handler == null) {
handler = new CaptureActivityHandler(this, decodeFormats,
characterSet);
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
if (!hasSurface) {
hasSurface = true;
initCamera(holder);
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
hasSurface = false;
}
public ViewfinderView getViewfinderView() {
return viewfinderView;
}
public Handler getHandler() {
return handler;
}
public void drawViewfinder() {
viewfinderView.drawViewfinder();
}
public void handleDecode(Result obj, Bitmap barcode) {
inactivityTimer.onActivity();
viewfinderView.drawResultBitmap(barcode);
playBeepSoundAndVibrate();
txtResult.setText(obj.getBarcodeFormat().toString() + ":"
+ obj.getText());
barCode=obj.getText().toString();
//TextView t = (TextView)findViewById(R.id.txtResult2);
//t.setText("SEcond code here"+barCode);
}
private void initBeepSound() {
if (playBeep && mediaPlayer == null) {
// The volume on STREAM_SYSTEM is not adjustable, and users
found it
// too loud,
// so we now play on the music stream.
setVolumeControlStream(AudioManager.STREAM_MUSIC);
mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setOnCompletionListener(beepListener);
AssetFileDescriptor file = getResources().openRawResourceFd(
R.raw.beep);
try {
mediaPlayer.setDataSource(file.getFileDescriptor(),
file.getStartOffset(), file.getLength());
file.close();
mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
mediaPlayer.prepare();
} catch (IOException e) {
mediaPlayer = null;
}
}
}
private static final long VIBRATE_DURATION = 200L;
private void playBeepSoundAndVibrate() {
if (playBeep && mediaPlayer != null) {
mediaPlayer.start();
}
if (vibrate) {
Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
vibrator.vibrate(VIBRATE_DURATION);
}
}
/**
* When the beep has finished playing, rewind to queue up another one.
*/
private final OnCompletionListener beepListener = new OnCompletionListener() {
public void onCompletion(MediaPlayer mediaPlayer) {
mediaPlayer.seekTo(0);
}
};
}
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<SurfaceView android:id="#+id/preview_view"
android:layout_width="fill_parent"
android:layout_gravity="center"
android:layout_height="fill_parent"
android:layout_centerInParent="true"/>
<com.zijunlin.Zxing.Demo.view.ViewfinderView
android:id="#+id/viewfinder_view"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#color/transparent"/>
<TextView android:id="#+id/txtResult"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dip"
android:text="hello"
android:textSize="14sp"/>
<Button
android:id="#+id/button1"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="25dip"
android:layout_marginRight="30dip"
android:text="Button" />
</FrameLayout>
package com.zijunlin.Zxing.Demo.view;
import com.google.zxing.ResultPoint;
import com.zijunlin.Zxing.Demo.R;
import com.zijunlin.Zxing.Demo.camera.CameraManager;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import java.util.Collection;
import java.util.HashSet;
/**
* This view is overlaid on top of the camera preview. It adds the viewfinder
rectangle and partial
* transparency outside it, as well as the laser scanner animation and result points.
*
* #author dswitkin#google.com (Daniel Switkin)
*/
public final class ViewfinderView extends View {
private static final int[] SCANNER_ALPHA = {0, 64, 128, 192, 255, 192, 128, 64};
private static final long ANIMATION_DELAY = 100L;
private static final int OPAQUE = 0xFF;
private final Paint paint;
private Bitmap resultBitmap;
private final int maskColor;
private final int resultColor;
private final int frameColor;
private final int laserColor;
private final int resultPointColor;
private int scannerAlpha;
private Collection<ResultPoint> possibleResultPoints;
private Collection<ResultPoint> lastPossibleResultPoints;
// This constructor is used when the class is built from an XML resource.
public ViewfinderView(Context context, AttributeSet attrs) {
super(context, attrs);
// Initialize these once for performance rather than calling them every time in
onDraw().
paint = new Paint();
Resources resources = getResources();
maskColor = resources.getColor(R.color.viewfinder_mask);
resultColor = resources.getColor(R.color.result_view);
frameColor = resources.getColor(R.color.viewfinder_frame);
laserColor = resources.getColor(R.color.viewfinder_laser);
resultPointColor = resources.getColor(R.color.possible_result_points);
scannerAlpha = 0;
possibleResultPoints = new HashSet<ResultPoint>(5);
}
#Override
public void onDraw(Canvas canvas) {
Rect frame = CameraManager.get().getFramingRect();
if (frame == null) {
return;
}
int width = canvas.getWidth();
int height = canvas.getHeight();
// Draw the exterior (i.e. outside the framing rect) darkened
paint.setColor(resultBitmap != null ? resultColor : maskColor);
canvas.drawRect(0, 0, width, frame.top, paint);
canvas.drawRect(0, frame.top, frame.left, frame.bottom + 1, paint);
canvas.drawRect(frame.right + 1, frame.top, width, frame.bottom + 1, paint);
canvas.drawRect(0, frame.bottom + 1, width, height, paint);
if (resultBitmap != null) {
// Draw the opaque result bitmap over the scanning rectangle
paint.setAlpha(OPAQUE);
canvas.drawBitmap(resultBitmap, frame.left, frame.top, paint);
} else {
// Draw a two pixel solid black border inside the framing rect
paint.setColor(frameColor);
canvas.drawRect(frame.left, frame.top, frame.right + 1, frame.top + 2, paint);
canvas.drawRect(frame.left, frame.top + 2, frame.left + 2, frame.bottom - 1, paint);
canvas.drawRect(frame.right - 1, frame.top, frame.right + 1, frame.bottom - 1,
paint);
canvas.drawRect(frame.left, frame.bottom - 1, frame.right + 1, frame.bottom + 1,
paint);
// Draw a red "laser scanner" line through the middle to show decoding is active
paint.setColor(laserColor);
paint.setAlpha(SCANNER_ALPHA[scannerAlpha]);
scannerAlpha = (scannerAlpha + 1) % SCANNER_ALPHA.length;
int middle = frame.height() / 2 + frame.top;
canvas.drawRect(frame.left + 2, middle - 1, frame.right - 1, middle + 2, paint);
Collection<ResultPoint> currentPossible = possibleResultPoints;
Collection<ResultPoint> currentLast = lastPossibleResultPoints;
if (currentPossible.isEmpty()) {
lastPossibleResultPoints = null;
} else {
possibleResultPoints = new HashSet<ResultPoint>(5);
lastPossibleResultPoints = currentPossible;
paint.setAlpha(OPAQUE);
paint.setColor(resultPointColor);
for (ResultPoint point : currentPossible) {
canvas.drawCircle(frame.left + point.getX(), frame.top + point.getY(), 6.0f,
paint);
}
}
if (currentLast != null) {
paint.setAlpha(OPAQUE / 2);
paint.setColor(resultPointColor);
for (ResultPoint point : currentLast) {
canvas.drawCircle(frame.left + point.getX(), frame.top + point.getY(), 3.0f,
paint);
}
}
// Request another update at the animation interval, but only repaint the laser line,
// not the entire viewfinder mask.
postInvalidateDelayed(ANIMATION_DELAY, frame.left, frame.top, frame.right,
frame.bottom);
}
}
public void drawViewfinder() {
resultBitmap = null;
invalidate();
}
/**
* Draw a bitmap with the result points highlighted instead of the live scanning
display.
*
* #param barcode An image of the decoded barcode.
*/
public void drawResultBitmap(Bitmap barcode) {
resultBitmap = barcode;
invalidate();
}
public void addPossibleResultPoint(ResultPoint point) {
possibleResultPoints.add(point);
}
}

Use the attribute android:gravity in XML like this :
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:gravity="right"
android:text="TextView" />
Or if you want to change programmatically, use this :
myTextView.setGravity(Gravity.RIGHT);

if your textView has fill_parent in layout params #Deepanker Chaudhary's solution is right.
but your textView has wrap_content like sizes in layoutparams you should use margins.

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Surface View and Linear layout and onClick event - android

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Resources