Question

我正在为我的学习目的制作一个语言应用程序并在Android中练习我想将所有课程音频存储在一个数组中，当我按下例如音频1时，我会为每节课有一个活动它会弹出一个与玩家一起的新活动（AudioPopup.java）但问题是我不想让弹出窗口为每节课播放某些音频我需要的是识别按下了哪个按钮并打开我创建的AudioPopup并播放某个mp3

AudioPopup代码

public class AudioPopup extends AppCompatActivity {

    SeekBar seek_bar;
    ImageView play_button, pause_button;
    MediaPlayer player;
    ImageView exitPlayer;
    Handler seekHandler = new Handler();
    private int [] audioFiles;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.audio_popup);

        setFinishOnTouchOutside(false);
        audioFiles = new int [] {R.raw.lesson1-1,R.raw.lesson1-2,R.raw.lesson1-3,R.raw.lesson1-4};


        getInit();
        seekUpdation();

        exitPlayer = (ImageView) findViewById(R.id.audio_exit_1);
        exitPlayer.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
                player.stop();

            }
        });

    }

    public void getInit() {
        seek_bar = (SeekBar) findViewById(R.id.seekbar_1);
        play_button = (ImageView) findViewById(R.id.audio_play_1);
        pause_button = (ImageView) findViewById(R.id.audio_stop_1);

        play_button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {


                PlayAudio();

            }
        });
        pause_button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                player.stop();
                releaseMediaPlayer();
                player = MediaPlayer.create(AudioPopup.this, lesson1-1);
                play_button.setImageResource(R.drawable.ic_play_circle_filled_black_48dp);
            }
        });

        player = MediaPlayer.create(this, R.raw.l01_audiotraining_grammatik_01);
        seek_bar.setMax(player.getDuration());
        seek_bar.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                seekChange(v);
                return false;
            }
        });


    }

    Runnable run = new Runnable() {
        @Override
        public void run() {
            seekUpdate();

        }
    };

public void seekUpdate() {


    seek_bar.setProgress(player.getCurrentPosition());
    seekHandler.postDelayed(run, 1000);



}

//event handler for the progress of seek bar
private void seekChange(View view) {
    if (player.isPlaying()) {
        SeekBar sb = (SeekBar) view;
        player.seekTo(sb.getProgress());

    }

}

private void releaseMediaPlayer() {
    // If the media player is not null, then it may be currently playing a sound.
    if (player != null) {
        // Regardless of the current state of the media player, release its resources
            // because we no longer need it.
            player.release();

            // Set the media player back to null. For our code, we've decided that
            // setting the media player to null is an easy way to tell that the media player
            // is not configured to play an audio file at the moment.
            player = null;
        }
    }

    private void PlayAudio(){

        if (player == null) {
            player = MediaPlayer.create(AudioPopup.this,R.raw.lesson1-1 );
        }

        if (player.isPlaying()) {

            player.pause();
            play_button.setImageResource(R.drawable.ic_play_circle_filled_black_48dp);
            try {
                player.prepare();
            } catch (IllegalStateException e) {

                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }

        } else {


            play_button.setImageResource(R.drawable.ic_pause_circle_filled_black_48dp);
            player.start();


        }
    }

}

这只播放音频我插入它并不能识别第一个活动中的哪个按钮来自

audio1 = (ImageView) popupView.findViewById(R.id.lesson1_audio_gramar_1);
assert audio1 != null;
audio1.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent audio_intent = new Intent(getApplicationContext(), AudioPopup.class);
        startActivity(audio_intent);

    }
});

我在每节课中为每个音频按下了很多按钮，实际上是24课:(

Answer 1

您需要做的是从第一个活动传递选定的课程并加载在第二个播放适当的音频

您可以通过多种方式识别要播放的按钮（课程），

简单的一个是数字1,2,3 ...每个数字代表课程或者您可以传递音频文件的资源ID，并在下一个活动中播放它此选项更好，因为您不必在下一个活动中使用if语句来了解哪个课程索引4代表。

所以我们走了

对于audio1按钮，传递第1课的res id

audio1.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent audio_intent = new Intent(getApplicationContext(), AudioPopup.class);
        audio_intent.putExtra("lesson_res_id", R.raw.lesson1-1);
        startActivity(audio_intent);

    }
});

和audio2按钮，传递第2课的res id

audio2.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent audio_intent = new Intent(getApplicationContext(), AudioPopup.class);
        audio_intent.putExtra("lesson_res_id", R.raw.lesson2-2);
        startActivity(audio_intent);

    }
});

现在在第二个活动中，获取此传递的值，然后播放音频。

int lessonResId = getIntent().getIntExtra("lesson_res_id", -100); //-100 is default, means the key 'lesson_res_id' was not found in extras bundle
playAudio(lessonResId);

你可以重构代码（如果你有太多的按钮）通过创建一个启动弹出活动的方法，并从onClick传递音频res id

调用它

private void openPopupActivity(int resId){
    Intent audio_intent = new Intent(getApplicationContext(), AudioPopup.class);
    audio_intent.putExtra("lesson_res_id", resId);
    startActivity(audio_intent);
}

和onClick将是

audio2.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        openPopupActivity(R.raw.lesson2-2);
    }
});

如何从上一个活动中单击某个按钮时播放音频文件

1 个答案: