Android多媒体功能开发-使用SurfaceView和MediaPlayer播放视频的例子

package com.zzk.a1505surfaceview; import androidx.appcompat.app.AppCompatActivity; import android.media.MediaPlayer; import android.os.Bundle; import android.os.Handler; import android.view.SurfaceView; import android.view.View; import android.widget.*; public class MainActivity extends AppCompatActivity { SurfaceView surfaceView; MediaPlayer player; SeekBar seekBar; Handler handler; Runnable runnable; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); LinearLayout ll = new LinearLayout(this); ll.setOrientation(LinearLayout.VERTICAL); setContentView(ll); Button btnPlay = new Button(this); btnPlay.setText("Play"); ll.addView(btnPlay); btnPlay.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View arg0) { player.setDisplay(surfaceView.getHolder()); player.start(); startTimer(); } }); Button btnStop = new Button(this); btnStop.setText("Stop"); ll.addView(btnStop); btnStop.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View arg0) { //player.stop(); // stop后player对象不能再播放 player.pause(); player.seekTo(0); stopTimer(); } }); Button btnPause = new Button(this); btnPause.setText("Pause"); ll.addView(btnPause); btnPause.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View arg0) { if(player.isPlaying()){ player.pause(); stopTimer(); ((Button)arg0).setText("Continue"); } else { player.start(); startTimer(); ((Button)arg0).setText("Pause"); } } }); Button btnReset = new Button(this); btnReset.setText("Reset"); ll.addView(btnReset); btnReset.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View arg0) { //player.reset(); // reset后需要重新设置视频来源 player.seekTo(0); } }); player = MediaPlayer.create(this, R.raw.demo); surfaceView = new SurfaceView(this); surfaceView.getHolder().setFixedSize(1080, 720); //player.setDisplay(surfaceView.getHolder()); // 不能在此设置，因为surfaceView还未准备好，在play按钮按下时再设置即可 ll.addView(surfaceView); seekBar = new SeekBar(this); seekBar.setMax(100); ll.addView(seekBar); seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener(){ @Override public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) { } @Override public void onStartTrackingTouch(SeekBar arg0) { } @Override public void onStopTrackingTouch(SeekBar arg0) { int pos = seekBar.getProgress() * player.getDuration() / seekBar.getMax(); player.seekTo(pos); } }); player.setOnCompletionListener(new MediaPlayer.OnCompletionListener(){ @Override public void onCompletion(MediaPlayer arg0) { stopTimer(); } }); initTimer(); } protected void onDestroy(){ super.onDestroy(); stopTimer(); player.release(); } void initTimer(){ handler = new Handler(); runnable = new Runnable(){ @Override public void run() { int d = player.getDuration(); int p = player.getCurrentPosition(); seekBar.setProgress(p*seekBar.getMax()/d); handler.postDelayed(runnable, 1000); } }; } void startTimer(){ handler.postDelayed(runnable, 1000); } void stopTimer(){ handler.removeCallbacks(runnable); } }