Question

首先，我是Java的新手。其次，我的意图如下：

用户点击按钮（playPause） - ＆gt;按钮切换为暂停可绘制（pause1），流开始和用户点击按钮 - ＆gt;流暂停和按钮切换以播放drawable（play1）。

现在我的问题是如何在当前方法onClick内部实现此行为，playPauseMusic方法，其中包含用于异步准备MediaPlayer的onPrepared方法。 / p>

我的直觉是检查isPlaying并从那里切换，但到目前为止我的尝试都以失败告终。

以下是相关代码，感谢您的时间：

radio.java

package com.example.jacob.wutk;

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;

import java.io.IOException;

public class radio extends AppCompatActivity {

    /** Called when the user touches the button */

    public void playMusic(View view) throws IOException {
        String url = "http://streamer.cci.utk.edu:8000/wutk-vorbis"; // your URL here
        MediaPlayer mediaPlayer = new MediaPlayer();

        mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {

            public void onPrepared(MediaPlayer mediaPlayer){
                mediaPlayer.start();
            }
        });
        mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        mediaPlayer.setDataSource(url);
        mediaPlayer.prepareAsync();
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_radio);
    }
}

Answer 1

我希望这会有所帮助。

public class radio extends AppCompatActivity {
 MediaPlayer mediaPlayer;
boolean prepared=false;

public void playMusic(View view) throws IOException {

    playpause();

}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_radio);
    mediaPlayer = new MediaPlayer();
    String url = "http://streamer.cci.utk.edu:8000/wutk-vorbis"; 
    mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mediaPlayer.setDataSource(url);
    mediaPlayer.prepareAsync();
    mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {

        public void onPrepared(MediaPlayer mediaPlayer){
            prepared=ture;
        }
    });
}
}

public void playPause() {
if (!mediaplayer.isPlaying()&&prepared) {
     mediaplayer.start();
    mediaplayer.setImageResource(R.drawable.ic_pause);
} else if(mediaplayer.isPlaying()) {

    mediaplayer.pause();
    mediaplayer.setImageResource(R.drawable.ic_play);
}
}

在onPrepare中添加onClick方法

1 个答案: