Android 媒体播放器

发布于 2024-12-05 01:47:48 字数 752 浏览 0 评论 0原文

我想在此活动中准备我的媒体播放器，准备好后我想跳转到另一个活动并在那里启动媒体播放器。它没有跳到其他活动，你能帮我吗？

        public void run() {

            try {
                mp.setDataSource(urls.getFirst());
                mp.setAudioStreamType(AudioManager.STREAM_MUSIC);       
                mp.setOnPreparedListener(new OnPreparedListener() {
                    @Override
                    public void onPrepared(MediaPlayer mp) {
                        Intent i = new Intent(Start.this, RadyoBabylonActivity.class);
                        startActivity(i);
                    }
                });
                mp.prepare();   

            } catch (Exception e) {

                e.printStackTrace();
            }   
        }
    });
    th.start();

原文

I want to prepare my mediaplayer on this activity and when its prepared I want to jump to another activity and start the mediaplayer there. It doesn't jump to the other activity can you help me please?

        public void run() {

            try {
                mp.setDataSource(urls.getFirst());
                mp.setAudioStreamType(AudioManager.STREAM_MUSIC);       
                mp.setOnPreparedListener(new OnPreparedListener() {
                    @Override
                    public void onPrepared(MediaPlayer mp) {
                        Intent i = new Intent(Start.this, RadyoBabylonActivity.class);
                        startActivity(i);
                    }
                });
                mp.prepare();   

            } catch (Exception e) {

                e.printStackTrace();
            }   
        }
    });
    th.start();

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深海里的那抹蓝 2024-12-12 01:47:48

我相信这里的问题是您试图直接从后台线程启动 Activity 。我不认为这可以直接在 Android 中完成 - 相反，您必须让 Activity 从 UI 线程启动。因此，在Android中执行此操作的方法是使用Handler。 Handler 存在于 UI 线程中，并从后台线程接收消息来执行 UI 操作，例如启动另一个 Activity。

示例：

//Inside your activity:
final Handler messageHandler = new Handler() {
    public void handleMessage(Message msg) 
    {
        //Start Activity
        Intent i = new Intent(Start.this, RadyoBabylonActivity.class);
        startActivity(i);
    }
}

//Inside onPrepared(MediaPlayer mp):
messageHandler.sendEmptyMessage(0);

另请参阅： http://developer.android.com/reference/android/ os/Handler.html

I believe the issue here is that you are trying to start an Activity directly from a background thread. I do not believe this is possible to do directly in Android - instead you must have the Activity start from the UI thread. Therefore, the way to do this in Android is to use a Handler. The Handler lives on the UI thread and receives messages from the background thread to do your UI actions such as starting another Activity.

Example:

//Inside your activity:
final Handler messageHandler = new Handler() {
    public void handleMessage(Message msg) 
    {
        //Start Activity
        Intent i = new Intent(Start.this, RadyoBabylonActivity.class);
        startActivity(i);
    }
}

//Inside onPrepared(MediaPlayer mp):
messageHandler.sendEmptyMessage(0);

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