我阅读了许多使用 com.android.camera.action.CROP 的示例，但他们都说要从画廊或相机中裁剪图像。任何人都可以告诉我如何使用 com.android.camera.CROP 裁剪位图？我尝试了很多方法，但仍然失败..我曾尝试将位图保存到文件，并从该文件创建一个 uri 变量，并将 uri 变量用作 com.android.camera.action.CROP 的数据......但是还是失败了……TT
这是我的代码
public class CobaSaveImageActivity extends Activity {
public ImageView tampilan;
public static Bitmap bmp;
public Uri mImageCaptureUri;
int i = 1;
File f;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tampilan = (ImageView)findViewById(R.id.imageView1);
//bmp = BitmapFactory.decodeFile("/mnt/sdcard/bluetooth/enigma.bmp");
bmp = BitmapFactory.decodeFile("/mnt/sdcard/enigma.jpg");
tampilan.setImageBitmap(bmp);
}
public void save (View v){
f = new File(Environment.getExternalStorageDirectory()+"/image/save"+i+".jpg");
if (f.exists()) fileCheker(f);
try {
FileOutputStream fos = new FileOutputStream(f);
BufferedOutputStream bit = new BufferedOutputStream(fos);
bmp.compress(Bitmap.CompressFormat.JPEG, 50, bit);
bit.flush();
bit.close();
//bmp.recycle();
sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse
("file://" + Environment.getExternalStorageDirectory())));
Toast.makeText(this, "save complete to "+f.toString(), Toast.LENGTH_LONG).show();
mImageCaptureUri = Uri.fromFile(f);
doCrop();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void fileCheker(File in){
i++;
f = new File(Environment.getExternalStorageDirectory()+"/image/save"+i+".jpg");
if (f.exists()) fileCheker(f);
}
public static Bitmap grayscale (Bitmap bmp){
int height, width;
int pixel, A, R, G, B;
width = bmp.getWidth();
height = bmp.getHeight();
Bitmap bmpGray = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
for (int i =0;i<width;++i){
for(int j=0;j<height;++j){
pixel = bmp.getPixel(i,j);
A = Color.alpha(pixel);
R = Color.red(pixel);
G = Color.green(pixel);
B = Color.blue(pixel);
R = G = B = (int)((R+G+B)/3);
bmpGray.setPixel(i, j, Color.argb(A, R, G, B));
}
}
return bmpGray;
}
public void gray(View v){
new backtask().execute();
//bmp = grayscale(bmp); tampilan.setImageBitmap(bmp);
//
}
public class backtask extends AsyncTask<Void, Void, Void>{
//Bitmap temp;
ProgressDialog prog;
@Override
protected void onPreExecute(){
super.onPreExecute();
prog = ProgressDialog.show(CobaSaveImageActivity.this, "", "Progress...",true);
}
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
bmp = grayscale(bmp);
return null;
}
@Override
protected void onPostExecute(Void result){
super.onPostExecute(result);
prog.dismiss();
tampilan.setImageBitmap(bmp);
}
}
private void doCrop() {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setType("image/*");
intent.setData(mImageCaptureUri);
//intent.putExtra("crop", true);
intent.putExtra("outputX", 200);
intent.putExtra("outputY", 200);
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("scale", true);
intent.putExtra("return-data", true);
startActivityForResult(intent, 1);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data){
if (resultCode != RESULT_OK) return;
switch (requestCode){
case 1 :
Bundle extras = data.getExtras();
if (extras != null){
Bitmap crop = extras.getParcelable("data");
tampilan.setImageBitmap(crop);
}
break;
}
}
}