bitmap 内存溢出 decodeByteArray

[代码s贝多芬的音符]

public classMainActivity extends Activity {
private static final String TAG

= "MainActivity";
private SurfaceView surfaceView;
private Camera camera;

@Override
public void onCreate(Bundle

savedInstanceState) {
super.onCreate(savedInstanceState);

Window window = getWindow();
requestWindowFeature

(Window.FEATURE_NO_TITLE);// 没有标题
window.setFlags

(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.

FLAG_FULLSCREEN);// 设置全屏
window.addFlags

(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);// 高亮

setContentView(R.layout.main);

surfaceView =

(SurfaceView) findViewById(R.id.surfaceView);

surfaceView.getHolder().setFixedSize(176, 144); // 设置分辨率
/*
*
* 下面设置Surface不维护自己的缓冲区，而是等待屏幕的渲染引擎将内容推送到用
*
* 户面前
*/
surfaceView.getHolder().setType

(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

surfaceView.getHolder().addCallback(new SurfaceCallback());
}

private final class SurfaceCallback implements

SurfaceHolder.Callback {
private boolean preview;

@Override
public void surfaceChanged

(SurfaceHolder holder, int format, int width,

int height) {
}

@Override
public

void surfaceCreated(SurfaceHolder holder) {
//打开摄像头
camera = Camera.open();


WindowManager wm = (WindowManager) getSystemService

(Context.WINDOW_SERVICE);
Display display =

wm.getDefaultDisplay();
Camera.Parameters

parameters = camera.getParameters();


parameters.setPreviewSize(display.getWidth(), display.getHeight());//设置预览照片的大小
parameters.setPreviewFrameRate

(3);//每秒3帧
parameters.setPictureFormat

(PixelFormat.JPEG);//设置照片的输出格式


parameters.set("jpeg-quality", 85);//照片质量


parameters.setPictureSize(display.getWidth(), display.getHeight());//设置照片的大小
camera.setParameters(parameters);


try {


camera.setPreviewDisplay(surfaceView.getHolder());//通过SurfaceView显示取景画面
camera.startPreview();


preview = true;
} catch

(IOException e) {
Log.e(TAG, e.toString

());
}
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {

if (camera != null) {
if (preview) {

camera.stopPreview();

}
camera.release();

}
}

}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if

(camera != null && event.getRepeatCount() == 0) {
switch

(keyCode) {
case KeyEvent.KEYCODE_SEARCH:// 搜索键

// 自动对焦

camera.autoFocus(null);
return true;

case KeyEvent.KEYCODE_CAMERA:// 拍照键

case KeyEvent.KEYCODE_DPAD_CENTER:// 确定键

camera.takePicture(null, null, new TakePictureCallback());

return true;
}
}

return super.onKeyDown(keyCode, event);
}

private final class TakePictureCallback implements PictureCallback {

@Override
public void onPictureTaken(byte[] data,

Camera camera) {
try {

Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0,
data.length);

File file = new File

(Environment.getExternalStorageDirectory(), System
.currentTimeMillis()
+

".jpg");
FileOutputStream outStream =

new FileOutputStream(file);

bitmap.compress(CompressFormat.JPEG, 100, outStream);

outStream.close();

camera.stopPreview();
camera.startPreview();

} catch (Exception e) {

Log.e(TAG, e.toString());
}
}

}

}







<?xml version="1.0" encoding="utf-8" ?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" androidrientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent">
<SurfaceView android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/surfaceView" />
</LinearLayout>

[代码s贝多芬的音符]

有谁知道吗？？？

[dinjay]

回收只是通知系统，但是不会马上回收的。如果慢了，那你又new了，那就溢出了
你每次taken的时候都去new一个bitmap，这样很容易溢出。
最好是弄一个全局的bitmap，然后每次只是往这个bitmap上画，当然，要先清空内容。bitmap的大小可以直接以屏幕的宽高来create

[sniffer12345]

哎 这问题搜一下不一大堆吗
用BitmapFactory.decodeStream 这个是用NATIVE的方法去生成bitmap，其他的是JAVA调用库生成的，所以容易buffer exceed

[代码s贝多芬的音符]

我用的是decodeByteArray

[纠结的木棉花]

http://www.blogjava.net/MEYE/articles/331520.html
bitmap 设置图片尺寸，避免 内存溢出 OutOfMemoryError的优化方法

[代码s贝多芬的音符]

Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0,
data.length);

File file = new File

(Environment.getExternalStorageDirectory(), System
.currentTimeMillis()
+

".jpg");
FileOutputStream outStream =

new FileOutputStream(file);

bitmap.compress(CompressFormat.JPEG, 100, outStream);

outStream.close();
if(bitmapObject.isRecycled()==false) //如果没有回收
bitmapObject.recycle();
camera.stopPreview();
camera.startPreview();

[代码s贝多芬的音符]

我已经 加了回收 还是没有用啊

[代码s贝多芬的音符]

谁更好的照相机程序吗？

[sayyanfu]

[Quote=引用 2 楼 sun6223508 的回复:]

Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0,
data.length);

File file = new File

(Environment.getExternalStorageDirectory(), System
.currentTimeMillis()
+

".jpg");
……
[/Quote]
你的bitmapObject是哪来的？