获取从库中选择的视频文件的路径，并获取NULL.如何获取视频文件的路径? [英] get path of video file selected from gallery getting NULL. How to get path of video file?

问题描述

获取从图库中选择的视频文件的路径，并获取NULL.如何获取视频文件的路径? 在活动结果"中获取URi时也提供null.将Uri转换为String也会得到Null.

get path of video file selected from gallery getting NULL. How to get path of video file ? Get URi in Activity Result also give null. converting Uri to String also getting Null.

Intent intent;
String selectedVideo1Path, selectedVideo2Path;
EditText e1,e2;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.videos_activity);
    Button button1 = (Button) findViewById(R.id.video1_btn);
    Button button2 = (Button) findViewById(R.id.video2_btn);



    button1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            selectVideoFromGallery();
            startActivityForResult(intent, 101);
        }
    });

    button2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            selectVideoFromGallery();
            startActivityForResult(intent, 102);
        }
    });



}

    @Override
   protected void onActivityResult(int requestCode, int resultCode, Intent    data) {
    if (requestCode == 101) {
        if (data.getData() != null) {
            selectedVideo1Path = getPath(data.getData());

            Toast.makeText(MergeVideosActivity.this, "Path 1 : "+selectedVideo1Path, Toast.LENGTH_SHORT).show();


        } else {
            Toast.makeText(getApplicationContext(), "Failed to select video", Toast.LENGTH_LONG).show();
        }
    }
    if (requestCode == 102) {
        if (data.getData() != null) {
            selectedVideo2Path = getPath(data.getData());
            //String str2 = selectedVideo2Path.toString();
           // e2.setText(str2);
            Toast.makeText(MergeVideosActivity.this, "Path 2 : "+selectedVideo2Path, Toast.LENGTH_SHORT).show();

        } else {
            Toast.makeText(getApplicationContext(), "Failed to select video", Toast.LENGTH_LONG).show();
        }
    }
}

这是我的getPath method

public String getPath(Uri uri) {
    int column_index = 0;
    String[] projection = {MediaStore.Images.Media.DATA};
    Cursor cursor = managedQuery(uri, projection, null, null, null);
    if (cursor != null) {
        column_index =    cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);
        cursor.moveToFirst();

    }
    return cursor.getString(column_index);
}

从图库中选择的视频我希望它还好吗?检查

Selected Video from Gallery I hope its OK ? Check it

    public void selectVideoFromGallery() {
        if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)) {
            intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Video.Media.EXTERNAL_CONTENT_URI);
        } else {
            intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Video.Media.INTERNAL_CONTENT_URI);
        }
        intent.setType("video/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
    }
}

推荐答案

更新您的getPath方法

Update your getPath method

public String generatePath(Uri uri,Context context) {
        String filePath = null;
        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
        if(isKitKat){
            filePath = generateFromKitkat(uri,context);
        }

        if(filePath != null){
            return filePath;
        }

        Cursor cursor = context.getContentResolver().query(uri, new String[] { MediaStore.MediaColumns.DATA }, null, null, null);

        if (cursor != null) {
            if (cursor.moveToFirst()) {
                int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA);
                filePath = cursor.getString(columnIndex);
            }
            cursor.close();
        }
        return filePath == null ? uri.getPath() : filePath;
    }

    @TargetApi(19)
    private String generateFromKitkat(Uri uri,Context context){
        String filePath = null;
        if(DocumentsContract.isDocumentUri(context, uri)){
            String wholeID = DocumentsContract.getDocumentId(uri);

            String id = wholeID.split(":")[1];

            String[] column = { Media.DATA };
            String sel = Media._ID + "=?";

            Cursor cursor = context.getContentResolver().
                    query(Media.EXTERNAL_CONTENT_URI,
                            column, sel, new String[]{ id }, null);



            int columnIndex = cursor.getColumnIndex(column[0]);

            if (cursor.moveToFirst()) {
                filePath = cursor.getString(columnIndex);
            }

            cursor.close();
        }
        return filePath;
    }

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