ProgressPar在MediaPlayer播放时被阻止

我正在尝试制作MediaPlayer的循环播放,因此在播放时正在准备和设置进度的过程中不确定

我尝试了很多方法,但这是我最后一个:我更新AsyncTask<Object, Object, Object>上的栏。

我正在使用的类是CircularProgressView但我试图交换到ProgressBar并且行为是相同的

public void startPlaying(final Audio audio, final CircularProgressView progress_view) {

    if (!isPLAYING) {
        progress_view.setIndeterminate(true);
        progress_view.setVisibility(View.VISIBLE);
        progress_view.startAnimation();
        isPLAYING = true;
        audioPlaying = audio;
        mp = new MediaPlayer();

        new AsyncTask<Object, Object, Object>() {
            @Override
            protected Object doInBackground(Object... objects) {
                try {
                    mp.prepare();
                    publishProgress((int)-1);

                    mediaFileLengthInMilliseconds = mp.getDuration();
                    mp.start();

                    while (mp != null && mp.isPlaying()) {
                        Thread.sleep(100);
                        publishProgress((int) (mp.getCurrentPosition()));
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }

                return null;
            }

            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                try {
                    mp.setDataSource(audio.getFile().getUrl());
                } catch (IOException e) {
                    e.printStackTrace();
                }
                mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                    @Override
                    public void onCompletion(MediaPlayer mediaPlayer) {
                        stopPlaying();
                        publishProgress((int)-2);
                    }
                });
            }

            @Override
            protected void onProgressUpdate(Object... values) {
                super.onProgressUpdate(values);
                int value = (int)values[0];
                if (value == -1) {
                    progress_view.setIndeterminate(false);
                    progress_view.setMaxProgress(mediaFileLengthInMilliseconds);
                } else if (value == -2) {
                    progress_view.setVisibility(View.GONE);
                } else {
                    progress_view.setProgress((int) values[0]);
                    System.out.println("setting: " + values[0]);
                }
            }

            @Override
            protected void onPostExecute(Object o) {
                super.onPostExecute(o);
            }
        }.execute();

    } else {
        isPLAYING = false;
        stopPlaying();
    }
}

在调试时, ProgressBarCircularProgressView .setProgress()在音频再现过程中被调用,但它仍然indeterminate被阻塞,但progress_view.setIndeterminate(false)也被调用,并且它不会变得不确定。

当音频结束时, ProgressBarCircularProgressView会获得100%的进度。

任何线索?

非常感谢你提前。


编辑:

作为@Blackbelt建议,我不得不调用mediaFileLengthInMilliseconds = mp.getDuration(); publishProgress((int)-1);

但现在这是行为:

https://drive.google.com/file/d/0B-V0KHNRjbE_b3hkbkwtTXhIeTg/view?usp=sharing


编辑2 :日志mp.getDuration()mp.getCurrentPosition()

http://pastebin.com/g93V5X9F

或者这更清楚:

http://pastebin.com/kYm01Gpg

呼吁这部分:

            @Override
            protected void onProgressUpdate(Object... values) {
                super.onProgressUpdate(values);
                int value = (int)values[0];
                if (value == -1) {
                    progress_view.setIndeterminate(false);
                    progress_view.setMaxProgress(mediaFileLengthInMilliseconds);
                    Log.i("Stackoverflow:", "setMaxProgress to " + mediaFileLengthInMilliseconds);
                } else if (value == -2) {
                    progress_view.setVisibility(View.GONE);
                } else {
                    progress_view.setProgress((int) values[0]);
                    Log.i("Stackoverflow:", "setProgress to " + (int)values[0]);

                }
            }

编辑3 :我添加新的代码,注释掉函数setIndeterminate(boolean)并交换到ProgressBar

XML:

<ProgressBar
        android:id="@+id/progress_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:indeterminate="false"
        android:progress="40"
        android:visibility="gone"
        android:layout_alignTop="@+id/play_button"
        android:layout_alignLeft="@+id/play_button"
        android:layout_alignStart="@+id/play_button"
        android:layout_alignRight="@+id/play_button"
        android:layout_alignEnd="@+id/play_button"
        android:layout_alignBottom="@+id/play_button" />

Java

public void startPlaying(final Audio audio, final ProgressBar progress_view) {

    if (!isPLAYING) {
        Log.i("Stackoverflow", "startPlaying called");
        audio.put("times_listened", audio.getTimes_Listened() + 1);
        audio.saveEventually();

        progress_view.setVisibility(View.VISIBLE);
        isPLAYING = true;
        audioPlaying = audio;
        mp = new MediaPlayer();

        new AsyncTask<Object, Object, Object>() {
            @Override
            protected Object doInBackground(Object... objects) {
                try {
                    mp.prepare();
                    mediaFileLengthInMilliseconds = mp.getDuration();
                    publishProgress((int)-1);


                    mp.start();

                    while (mp != null && mp.isPlaying()) {
                        Thread.sleep(100);
                        publishProgress((int) (mp.getCurrentPosition()));
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }

                return null;
            }

            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                try {
                    mp.setDataSource(audio.getFile().getUrl());
                } catch (IOException e) {
                    e.printStackTrace();
                }
                mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                    @Override
                    public void onCompletion(MediaPlayer mediaPlayer) {
                        stopPlaying();
                        publishProgress((int)-2);
                    }
                });
            }

            @Override
            protected void onProgressUpdate(Object... values) {
                super.onProgressUpdate(values);
                int value = (int)values[0];
                if (value == -1) {
                    progress_view.setMax(mediaFileLengthInMilliseconds);
                    Log.i("Stackoverflow:", "setMaxProgress to " + mediaFileLengthInMilliseconds);
                } else if (value == -2) {
                    progress_view.setVisibility(View.GONE);
                } else {
                    progress_view.setProgress((int) values[0]);
                    Log.i("Stackoverflow:", "setProgress to " + (int)values[0]);

                    System.out.println("setting: " + values[0]);
                }
            }

            @Override
            protected void onPostExecute(Object o) {
                super.onPostExecute(o);
            }
        }.execute();

    } else {
        isPLAYING = false;
        stopPlaying();
    }
}

编辑4

我打电话给progress_view.isDeterminate() ,它每次都返回true 。 所以我决定在修改进度时做:

 @Override
            protected void onProgressUpdate(Object... values) {
                super.onProgressUpdate(values);
                int value = (int)values[0];
                if (value == -1) {
                    progress_view.setMax(mediaFileLengthInMilliseconds);
                    Log.i("Stackoverflow:", "setMaxProgress to " + mediaFileLengthInMilliseconds);
                } else if (value == -2) {
                    progress_view.setVisibility(View.GONE);
                } else {
                    if (progress_view.isIndeterminate()) // LOOK AT THIS
                        progress_view.setIndeterminate(false);
                    progress_view.setProgress((int) values[0]);
                    Log.i("Stackoverflow:", "setProgress to " + (int) values[0]);
                    Log.i("Stackoverflow", "Indeterminate state: " + progress_view.isIndeterminate());

                    System.out.println("setting: " + values[0]);
                }
            }

并且输出总是:

不确定状态:是

*为什么? *:'(


可能你想调用mediaFileLengthInMilliseconds = mp.getDuration(); 在调用publishProgress((int)-1); 而不是之后,或根本不使用该成员,因为您已将MediaPlayer作为成员保存,您可以直接查询它。

编辑

要解决视频中的问题,您必须使用以下样式style="@android:style/Widget.ProgressBar.Horizontal 。通过循环ProgressBarsetIndetermiate标志将被忽略

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