我正在制作可以合成相机预览和png的相机应用程序.
我想将图像保存在onPictureTaken回调中
我的消息来源如下
public void onPictureTaken(byte[] data,Camera camera) {
//preview from camera
Bitmap bitmap = BitmapFactory.decodeByteArray(data,data.length);
// overlay image
Bitmap overlayBmp = overlay.getDrawingCache();
//blank beatmap
Bitmap blankBitmap =
Bitmap.createBitmap(bitmap.getWidth(),bitmap.getHeight(),Bitmap.Config.ARGB_8888);
//make canvas
Canvas canvas = new Canvas(blankBitmap);
//composite image
canvas.drawBitmap(bitmap,null,new Rect(0,bitmap.getWidth(),bitmap.getHeight()),null);
canvas.drawBitmap(overlayBmp,null);
然而,它显示了outofmemoryerrorrror,我怎么能解决这个问题..？
05-20 15:13:49.114: E/AndroidRuntime(31647): FATAL EXCEPTION: main 05-20 15:13:49.114: E/AndroidRuntime(31647): java.lang.OutOfMemoryError 05-20 15:13:49.114: E/AndroidRuntime(31647): at android.graphics.Bitmap.nativeCreate(Native Method) 05-20 15:13:49.114: E/AndroidRuntime(31647): at android.graphics.Bitmap.createBitmap(Bitmap.java:605) 05-20 15:13:49.114: E/AndroidRuntime(31647): at android.graphics.Bitmap.createBitmap(Bitmap.java:585) 05-20 15:13:49.114: E/AndroidRuntime(31647): at com.example.firstcameraappli.MainActivity$2.onPictureTaken(MainActivity.java:103) 05-20 15:13:49.114: E/AndroidRuntime(31647): at android.hardware.Camera$EventHandler.handleMessage(Camera.java:750) 05-20 15:13:49.114: E/AndroidRuntime(31647): at android.os.Handler.dispatchMessage(Handler.java:99) 05-20 15:13:49.114: E/AndroidRuntime(31647): at android.os.Looper.loop(Looper.java:137) 05-20 15:13:49.114: E/AndroidRuntime(31647): at android.app.ActivityThread.main(ActivityThread.java:4514) 05-20 15:13:49.114: E/AndroidRuntime(31647): at java.lang.reflect.Method.invokeNative(Native Method) 05-20 15:13:49.114: E/AndroidRuntime(31647): at java.lang.reflect.Method.invoke(Method.java:511) 05-20 15:13:49.114: E/AndroidRuntime(31647): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
解决方法
试试这个代码……
PictureCallback myPictureCallback_JPG = new PictureCallback()
{
@Override
public void onPictureTaken(byte[] data,Camera arg1) {
BitmapFactory.Options opt;
opt = new BitmapFactory.Options();
opt.inTempStorage = new byte[16 * 1024];
Parameters parameters = arg1.getParameters();
Size size = parameters.getPictureSize();
int height11 = size.height;
int width11 = size.width;
float mb = (width11 * height11) / 1024000;
if (mb > 4f)
opt.inSampleSize = 4;
else if (mb > 3f)
opt.inSampleSize = 2;
//preview from camera
Bitmap bitmap = BitmapFactory.decodeByteArray(data,data.length,opt);
}
}
在位图中获取图像,然后根据您的要求使用.
