Android無法打開相冊檢視視訊

最近公司做了一個項目需要檢視手機視訊，在android 8的模拟器上正常。在android 5.1的模拟器下卻報了一個錯誤:

Caused by: java.lang.SecurityException: Permission Denial: starting Intent { act=android.intent.action.PICK dat=content://media/external/video/media 
cmp=com.android.music/.VideoBrowserActivity } from ProcessRecord{1b308dad 5422:com.videoclipper.demo/u0a58} (pid=5422, uid=10058) not exported from uid 10036
           

講道理不應該有權限問題的。因為target為21,而且api22沒有運作時權限，android 8也可以正常運作。這個現象真的很莫名其妙啊。經過搜尋找到了一種解決方法:

原文

// contentId will have the video content id as given by Content Resolver
// In this nparticular application, contentId is retrieved from ListActivity with custom adapter

Uri contentUri = ContentUris.withAppendedId(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, contentId);

try {
    Intent intent = new Intent(Intent.ACTION_VIEW, contentUri);
    startActivity(intent);
} 
catch (ActivityNotFoundException e) {//SecurityException 也可以
    Toast.makeText(this, "Not Supported", Toast.LENGTH_SHORT).show();
}
           

要調用 Gallery browser 使用以下代碼:

someMethod() {
   Intent intent = new Intent(Intent.ACTION_PICK, null);
   intent.setType("video/*");
   startActivityForResult(intent, 1);
}
           

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if ((requestCode == 1) && (resultCode == RESULT_OK) && (data != null)) {

        Log.i("---------------------", data.getData().getEncodedPath());
        mIntentFromGallery = data;

        Intent intent = new Intent(Intent.ACTION_MAIN, null);
        intent.setType("video/*");
        intent.setData(data.getData());
        try
        {
            startActivity(intent);
        }
        catch(Exception e)
        {
        }


    } else {
        setResult(RESULT_CANCELED);
        finish();
    }
}
           

綜合起來的解決方案就是:

Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Video.Media.EXTERNAL_CONTENT_URI);
            intent.setDataAndType(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, "video/*");
            startActivityForResult(intent, REQUEST_CODEE_VIDEO);