java - 尝试在我的录音机的同一按钮上实现播放/暂停功能

Question

我一直在 stackoverflow 上搜索与我的问题相关的答案，但到目前为止还没有找到任何内容。这是我的代码 fragment ，我不确定 onCreate 中的 onClick 方法是否走在正确的轨道上，因为我对 Java 还比较陌生。

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

    duration = (TextView) findViewById(R.id.audioDuration);
    seekbar = (SeekBar) findViewById(R.id.seek_bar);

    outputFile = Environment.getExternalStorageDirectory().getAbsolutePath() + "/recording.3gp";

    Button b1 = (Button) findViewById(R.id.btnRecord);
    b1.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    startRecording();
                    break;
                case MotionEvent.ACTION_UP:
                    stopRecording();
                    seekbar.clearAnimation();
                    break;
            }
            return false;
        }
    });
    final Button play = (Button) findViewById(R.id.play);
    play.setOnClickListener(new View.OnClickListener(){
        @Override
            public void onClick(View view){

        }
    });
} 
    public void playRecording(View view){
    try{
        mediaPlayer.setDataSource(outputFile);
    }
    catch(IOException e){
        e.printStackTrace();
    }
    try{
        mediaPlayer.prepare();
    }
    catch (IOException e){
        e.printStackTrace();
    }
    mediaPlayer.start();
    timeElapsed = mediaPlayer.getCurrentPosition();
    durationHandler.postDelayed(updateSeekBarTime, 100);
    Toast.makeText(getApplicationContext(), "Playing Audio..", Toast.LENGTH_LONG).show();
}

Answer 1

做法很简单 - 只需添加 play.setText("Play/Pause") 即可。对于您的代码，您可以这样做 -

final Button play = (Button) findViewById(R.id.play);
boolean isPlaying = false;
play.setOnClickListener(new View.OnClickListener(){
    @Override
        public void onClick(View view){
        if (isPlaying) {
           play.setText("Pause");
           isPlaying = false;
           //ADD CODE TO PAUSE HERE
        } else {
           play.setText("Play");
           isPlaying = true;
           //ADD CODE TO PLAY HERE
        }
    }
});

有什么问题就尽管问吧。另外，如果这对您有用，请将此答案标记为已选择。