Question

我试图制作一个应用程序来在android studio中剪切视频，然后将其分享到某个应用程序。但是，即使在切割过程完成之前，分享也似乎已经发生了

我的代码：

vidUris.add(Uri.fromFile(new File(dest.getAbsolutePath())));
String[] complexCommand = {"-i", yourRealPath, "-ss", "" + startMs, "-t", ""+leng , dest.getAbsolutePath()};
execFFmpegBinary(complexCommand);

Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND_MULTIPLE);
shareIntent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, vidUris);
shareIntent.setType("video/*");
startActivity(shareIntent);

Answer 1

请检查execFFmpegBinary是否是异步方法。

Answer 2

所以你需要一个回调函数，一旦剪切完成就会调用它。这样您就可以开始共享意图了。

要实现此行为，您可以考虑使用这样的界面。

public interface CuttingCompleted {
    void onCuttingCompleted(String[] vidUris); 
}

现在使用AsyncTask在后台线程中进行切割，并在完成后将结果传递给回调函数，以进一步执行代码流。

public class CuttingVideoAsyncTask extends AsyncTask<Void, Void, String[]> {

    private final Context mContext;
    public CuttingCompleted mCuttingCompleted;

    CuttingVideoAsyncTask(Context context, CuttingCompleted listener) {
        // Pass extra parameters as you need for cutting the video
        this.mContext = context;
        this.mCuttingCompleted = listener;
    }

    @Override
    protected String[] doInBackground(Void... params) {
        // This is just an example showing here to run the process of cutting. 
        String[] complexCommand = {"-i", yourRealPath, "-ss", "" + startMs, "-t", ""+leng , dest.getAbsolutePath()};
        execFFmpegBinary(complexCommand);
        return complexCommand;
    }

    @Override
    protected void onPostExecute(String[] vidUris) {
        // Pass the result to the calling Activity
        mCuttingCompleted.onCuttingCompleted(vidUris);
    }

    @Override
    protected void onCancelled() {
        mCuttingCompleted.onCuttingCompleted(null);
    }
}

现在，从Activity开始，您需要实现界面，以便在切割过程完全完成时启动共享意图。

public class YourActivity extends Activity implements CuttingCompleted {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // ... Other code

        new CuttingVideoAsyncTask(this, this).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
    }

    @Override
    public void onCuttingCompleted(String[] vidUris) {
        Intent shareIntent = new Intent();
        shareIntent.setAction(Intent.ACTION_SEND_MULTIPLE);
        shareIntent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, vidUris);
        shareIntent.setType("video/*");
        startActivity(shareIntent);
    }
}

如何在完成上述代码执行ID后运行Intent

2 个答案: