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大家好 我嘗試使用SurfaceView，但鑑於出現了黑色，並且沒有畫 這裏我的代碼問題的SurfaceView和其持有者
package com.samples;
import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.BlurMaskFilter;
import android.graphics.BlurMaskFilter.Blur;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PorterDuff;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.RectF;
import android.graphics.Region;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageView;
public class Galary extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(new GalaryView(this));
}
private static class GalaryView extends SurfaceView implements Callback {
private SurfaceHolder surfaceHolder;
public GalaryView(Context context) {
super(context);
surfaceHolder = getHolder();
surfaceHolder.addCallback(this);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
Effects effects= new Effects(surfaceHolder, this);
effects.start();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
}
}
第二個文件
package com.samples;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.graphics.Region;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class Effects extends Thread {
private SurfaceView surfaceView;
private SurfaceHolder surfaceHolder;
private Bitmap bitmap1;
private Path mPath;
private Bitmap bitmap2;
private Paint paint;
public Effects(SurfaceHolder surfaceHolder, SurfaceView surfaceView) {
this.surfaceView = surfaceView;
this.surfaceHolder = surfaceHolder;
this.mPath = new Path();
bitmap1 = BitmapFactory.decodeResource(surfaceView.getContext()
.getResources(), R.drawable.qina1);
bitmap2 = BitmapFactory.decodeResource(surfaceView.getContext()
.getResources(), R.drawable.qina2);
paint= new Paint();
}
@Override
public void run() {
Canvas canvas = surfaceHolder.lockCanvas();
canvas.drawColor(Color.WHITE);
for (int i = 1; i < 100; i++) {
canvas.drawBitmap(bitmap1, 0, 0, null);
canvas.save();
canvas.translate(0, 0);
mPath.reset();
canvas.clipPath(mPath);
int ovalWidth = (int) (surfaceView.getWidth() * (i/100.0));
int ovalHeight = (int) (surfaceView.getHeight() * (i/100.0));
int ovalX = (surfaceView.getWidth() - ovalWidth)/2;
int ovalY = (surfaceView.getHeight() - ovalHeight)/2;
mPath.addOval(new RectF(ovalX, ovalY, ovalWidth + ovalX, ovalHeight
+ ovalY), Path.Direction.CCW);
canvas.clipPath(mPath, Region.Op.REPLACE);
canvas.drawBitmap(bitmap2, 0, 0, paint);
canvas.restore();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
請你能告訴我是什麼問題？ 非常感謝