关于获取imageview上的图片,保存到相册并通知相册自动更新

public class MainActivity extends Activity implements OnClickListener {

private String strPath;
private File sdCardDir;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.button).setOnClickListener(this);
}

@Override
public void onClick(View v) {
if (v.getId() == R.id.button) {
ImageView iv = (ImageView) findViewById(R.id.image);
iv.setDrawingCacheEnabled(true);
Bitmap b = Bitmap.createBitmap(iv.getDrawingCache());
iv.setDrawingCacheEnabled(false);
//       strPath = "/testSaveView/" + UUID.randomUUID().toString() + ".png";
strPath = Environment.getExternalStorageDirectory()
+ "/DCIM/Camera/" +"1.jpg";
boolean flag = false;
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
sdCardDir = Environment.getExternalStorageDirectory();
FileOutputStream fos = null;
try {
File file = new File(sdCardDir, strPath);
if (!file.getParentFile().exists()) {
file.getParentFile().mkdirs();
}
fos = new FileOutputStream(file);
b.compress(CompressFormat.JPEG, 100, fos);
fos.flush();
flag = true;
} catch (Exception e) {
Log.e("Save test", "save bitmap error : " + e);
} finally {
try {
fos.close();
} catch (IOException e) {
Log.e("Save test", "finally error : " + e);
}
}
}
Log.d("Tag", "地址" + sdCardDir.toString());
MediaScannerConnection.scanFile(MainActivity.this, new String[]{sdCardDir.toString()}, null, null);
Toast.makeText(MainActivity.this, (flag ? "�����ɹ�" : "����ʧ��"), Toast.LENGTH_LONG).show();
}

}

}