Question

我可以使用Android媒体播放器播放音频文件。我可以显示进度条和附加的2个按钮来暂停和播放音轨。我的问题是我无法使用进度条控制音轨。我想播放音轨以根据我将进度条拖动到的位置进行更新。

以下是我的代码

public class MyMediaPlayerView extends AppCompatActivity implements View.OnClickListener {

            /**
             * var for controller
             * restore timestamp today 12:11
             */
             SeekBar seek_bar;
             Button play_button, pause_button;
             MediaPlayer player;
             TextView text_shown;
             Handler seekHandler = new Handler();


            @Override
            protected void onCreate(Bundle savedInstanceState) {
                 super.onCreate(savedInstanceState);
                 setContentView(R.layout.activity_launch_webview);
                 getSupportActionBar().setDisplayHomeAsUpEnabled(true);

                 getInit();
                 seekUpdation();
             }

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

             public void seekUpdation() {
                 seek_bar.setProgress(player.getCurrentPosition());
                 seekHandler.postDelayed(run, 1000);

                 onProgressChanged(seek_bar, seek_bar.getProgress());
             }

             @Override 
             public void onClick(View view) {
                  switch (view.getId()) {
                  case R.id.play_button: text_shown.setText("Playing...");         
                  player.start();
                  break; case R.id.pause_button: player.pause();
                  text_shown.setText("Paused...");
                  }
             }

             public void onProgressChanged(SeekBar seek_Bar, int progress,
                  boolean fromUser) {
                  player.seekTo(progress);
             }
    }

Answer 1

我这样做

seek_bar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                if(fromUser)
                    player.seekTo(progress);
            }
       @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });

Answer 2

你忘了添加监听器把它放在你的onCreate()：

中

seek_bar = (SeekBar)findViewById(R.id.yourseekbarhere);
seek_bar.setOnSeekBarChangeListener(this);

应该帮助你

如何使用Android Media Player搜索栏来控制音频？

2 个答案: