Permission Denial: not allowed to send broadcast android.intent.action.MEDIA_MOUNTED from pid=2269,

转自：http://blog.csdn.net/u010156024/article/details/47681851

当在Android上进行图片的扫描功能开发时一般会使用：sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse(“file://”+ Environment.getExternalStorageDirectory()+ picPath)));的广播.

但是在Android4.4及以上版本中，执行上面的代码出现异常：W/ActivityManager( 498): Permission Denial: not allowed to send broadcast android.intent.action.MEDIA_MOUNTED from pid=2269, uid=20016

因为Android4.4中限制了系统应用才有权限使用广播通知系统扫描SD卡，所以会抛题目异常。

解决方法有两种方式：

第一种：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {//如果是4.4及以上版本
Intent mediaScanIntent = new Intent(
Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
Uri contentUri = Uri.fromFile(mPhotoFile); //out is your output file
mediaScanIntent.setData(contentUri);
CameraActivity.this.sendBroadcast(mediaScanIntent);
} else {
sendBroadcast(new Intent(
Intent.ACTION_MEDIA_MOUNTED,
Uri.parse("file://"
+ Environment.getExternalStorageDirectory())));
}

第二种方式：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { // 判断SDK版本是不是4.4或者高于4.4
String[] paths = new String[]{Environment.getExternalStorageDirectory().toString()};
MediaScannerConnection.scanFile(mContext, paths, null, null);
} else {
final Intent intent;
if (f.isDirectory()) {
intent = new Intent(Intent.ACTION_MEDIA_MOUNTED);
intent.setClassName("com.android.providers.media", "com.android.providers.media.MediaScannerReceiver");
intent.setData(Uri.fromFile(Environment.getExternalStorageDirectory()));
} else {
intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
intent.setData(Uri.fromFile(new File(path)));
}
mContext.sendBroadcast(intent);
}

上面两种方式亲测有效，说白了，在高版本中，使用MediaScannerConnection类或者ACTION_MEDIA_SCANNER_SCAN_FILE广播通知系统扫描文件夹，在低版本中使用ACTION_MEDIA_MOUNTED广播通知系统