在我的应用程序中，我需要在画布中显示图像，我尝试使用下面的代码，它的工作效果很好。但如果一次又一次地播放同一页面，我的位图大小超出内存异常。我在网上冲浪，我当时设置了样本大小我也遇到了例外，请任何人帮助我这么多天在病房里遇到这个问题。
Lines.class
public class Lines extends Activity
{
BitmapDrawable sounddrawable,erasedrawable,backdrwable,fwddrwable,captiondrwable,img1drwable;
Bitmap img1bitmap,soundbitmap,eraseBitmap,backbitmap,fwdbitmap,captionbitmap;
Bitmap bitmapOrg1,bitmapOrg2,bitmapOrg3,bitmapOrg4,bitmapOrg5,bitmapOrg6,bitmapOrg;
MyView myview;
View content;
float screenHeight,screenWidth,screendensity;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setNoTitle();
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
screenHeight = displaymetrics.heightPixels;
screenWidth = displaymetrics.widthPixels;
screendensity = displaymetrics.densityDpi;
Log.i("screenHeight",""+screenHeight);
Log.i("screenWidth",""+screenWidth);
Log.i("screendensity",""+screendensity);
setContentView(R.layout.line);
widtho=(int)(91*(screenWidth/1024));
highto=(int)(175*(screenHeight/600));
bitmapOrg = Bitmap.createScaledBitmap(bitmapOrg, widtho, highto, true);
leftorg=(int)(120*(screenWidth/1024));
toporg=(int)(130*(screenHeight/600));
bitmapOrg1 = BitmapFactory.decodeResource(getResources(),
R.drawable.line1_2);
width1=(int)(90*(screenWidth/1024));
hight1=(int)(175*(screenHeight/600));
bitmapOrg1 = Bitmap.createScaledBitmap(bitmapOrg1, width1, hight1, true);
leftorg1=(int)(300*(screenWidth/1024));
toporg1=(int)(130*(screenHeight/600));
bitmapOrg2 = BitmapFactory.decodeResource(getResources(),
R.drawable.line1_3);
bitmapOrg2 = Bitmap.createScaledBitmap(bitmapOrg2, widtho, highto, true);
leftorg2=(int)(470*(screenWidth/1024));
toporg2=(int)(130*(screenHeight/600));
bitmapOrg3 = BitmapFactory.decodeResource(getResources(),
R.drawable.line1_4);
bitmapOrg3 = Bitmap.createScaledBitmap(bitmapOrg3, width1, hight1, true);
leftorg3=(int)(640*(screenWidth/1024));
toporg3=(int)(130*(screenHeight/600));
bitmapOrg4 = BitmapFactory.decodeResource(getResources(),
R.drawable.line1_5);
bitmapOrg4 = Bitmap.createScaledBitmap(bitmapOrg4, width1, hight1, true);
leftorg4=(int)(810*(screenWidth/1024));
toporg4=(int)(130*(screenHeight/600));
bitmapOrg5 = BitmapFactory.decodeResource(getResources(),
R.drawable.line1_6);
width6=(int)(237*(screenWidth/1024));
hight6=(int)(139*(screenHeight/600));
bitmapOrg5 = Bitmap.createScaledBitmap(bitmapOrg5, width6, hight6, true);
leftorg5=(int)(150*(screenWidth/1024));
toporg5=(int)(370*(screenHeight/600));
bitmapOrg6 = BitmapFactory.decodeResource(getResources(),
R.drawable.line1_7);
bitmapOrg6 = Bitmap.createScaledBitmap(bitmapOrg6, width6, hight6, true);
leftorg6=(int)(600*(screenWidth/1024));
toporg6=(int)(370*(screenHeight/600));
}
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setColor(Color.BLACK);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(6);
}
private void setNoTitle() {
// TODO Auto-generated method stub
requestWindowFeature(Window.FEATURE_NO_TITLE);
}
private Paint mPaint;
private Bitmap mBitmap;
public void colorChanged(int color) {
mPaint.setColor(color);
}
public class MyView extends View
{
private Canvas mCanvas;
private Path mPath;
private Paint mBitmapPaint;
public MyView(Context context) {
super(context);
// TODO Auto-generated constructor stub
mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
if (mBitmap != null) {
mBitmap.recycle();
mBitmap=null;
}
mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
mCanvas.setBitmap(mBitmap);
}
@Override
protected void onDraw(Canvas canvas) {
if(action)
{
invalidate();
}
Paint painto = new Paint();
painto.setAntiAlias(true);
painto.setColor(getResources().getColor(R.color.magnata));
painto.setStrokeWidth(3);
painto.setStyle(Paint.Style.FILL);
bitmapOrg.recycle();
canvas.drawBitmap(bitmapOrg, leftorg, toporg, null);
bitmapOrg1.recycle();
canvas.drawBitmap(bitmapOrg1, leftorg1,toporg1, null);
bitmapOrg2.recycle();
canvas.drawBitmap(bitmapOrg2, leftorg2,toporg2, null);
bitmapOrg3.recycle();
canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
canvas.drawBitmap(bitmapOrg3, leftorg3,toporg3, null);
bitmapOrg4.recycle();
canvas.drawBitmap(bitmapOrg4, leftorg4,toporg4, null);
bitmapOrg6.recycle();
canvas.drawBitmap(bitmapOrg6, leftorg6,toporg6, null);
bitmapOrg5.recycle();
canvas.drawBitmap(bitmapOrg5, leftorg5,toporg5, null);
canvas.drawPath(mPath, mPaint);
}
private float mX, mY;
private float TOUCH_TOLERANCE = 2;
private void touch_start(float x, float y) {
mPath.reset();
mPath.moveTo(x, y);
mX = x;
mY = y;
}
private void touch_move(float x, float y) {
float dx = Math.abs(x - mX);
float dy = Math.abs(y - mY);
if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2);
mX = x;
mY = y;
}
}
private void touch_up() {
mPath.lineTo(mX, mY);
mCanvas.drawPath(mPath, mPaint);
mPath.reset();
}
@Override
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX();
float y = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
touch_start(x, y);
invalidate();
break;
case MotionEvent.ACTION_MOVE:
touch_move(x, y);
invalidate();
break;
case MotionEvent.ACTION_UP:
touch_up();
invalidate();
break;
}
return true;
}
}