Android 简单视频播放器（破烂版，后续更新）

Android 简单视频播放器（破烂版，后续更新）

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="文件名称" />

    <EditText 
        android:id="@+id/edit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="oppo.mp4"
        />

    <LinearLayout 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <ImageButton 
           android:id="@+id/btn_play"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:src="@drawable/play"
           />

       <ImageButton 
           android:id="@+id/btn_pause"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:src="@drawable/pause"
           />

       <ImageButton 
           android:id="@+id/btn_stop"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:src="@drawable/stop"
           />

       <ImageButton 
           android:id="@+id/btn_reset"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:src="@drawable/reset"
           />
    LinearLayout>

    <SurfaceView 
        android:id="@+id/sv_video"
        android:layout_width="match_parent"
        android:layout_height="240dp"
        />

LinearLayout>

MainActivity.java

public class MainActivity extends Activity {

    private EditText edit;
    private ImageButton btn_play;
    private ImageButton btn_pause;
    private ImageButton btn_stop;
    private ImageButton btn_reset;
    private SurfaceView sv;
    private MediaPlayer mediaPlayer;
    private String filename;
    private int position;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //init
        edit = (EditText) findViewById(R.id.edit);
        btn_play = (ImageButton) findViewById(R.id.btn_play);
        btn_pause = (ImageButton) findViewById(R.id.btn_pause);
        btn_stop = (ImageButton) findViewById(R.id.btn_stop);
        btn_reset = (ImageButton) findViewById(R.id.btn_reset);

        sv = (SurfaceView) findViewById(R.id.sv_video);
        sv.getHolder().setFixedSize(176, 144);
        sv.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        sv.getHolder().addCallback(new SurfaceCallback());

        BtnListener btnListener = new BtnListener();
        mediaPlayer = new MediaPlayer();

        btn_play.setOnClickListener(btnListener);
        btn_pause.setOnClickListener(btnListener);
        btn_stop.setOnClickListener(btnListener);
        btn_reset.setOnClickListener(btnListener);

    }

    private final class SurfaceCallback implements SurfaceHolder.Callback {

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width,
                int height) {
            // TODO Auto-generated method stub

        }

        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            if(position > 0 && filename != null) {
                try {
                    play();
                    mediaPlayer.seekTo(position);
                    position = 0;
                } catch (Exception e) {
                    Log.i("VedioPlayer", e.toString());
                }
            }

        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            // TODO Auto-generated method stub
            if(mediaPlayer.isPlaying()) {
                position = mediaPlayer.getCurrentPosition();
                mediaPlayer.stop();
            }
        }

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mediaPlayer.release();
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        this.filename = savedInstanceState.getString("filename");
        this.position = savedInstanceState.getInt("position");
        Log.i("MediaPlayer", "onRestoreInstanceState");
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putString("filename", filename);
        outState.putInt("position", position);
        Log.i("VedioPlayer", "onSaveInstanceState");
    }

    private final class BtnListener implements OnClickListener {

        @Override
        public void onClick(View v) {
            if(!Environment.getExternalStorageState()
                    .equals(Environment.MEDIA_MOUNTED)) {
                Toast.makeText(MainActivity.this, "SD卡还未准备好", 1000).show();        
                return;
            }

            filename = edit.getText().toString();
            ImageButton btn = (ImageButton) v;
            try {
                switch (btn.getId()) {
                case R.id.btn_play:
                    play();
                    break;
                case R.id.btn_pause:
                    if(mediaPlayer.isPlaying()) {
                        mediaPlayer.pause();
                        btn.setImageResource(R.drawable.play);
                    } else {
                        mediaPlayer.start();
                        btn.setImageResource(R.drawable.pause);
                    }
                    break;
                case R.id.btn_stop:
                    if (mediaPlayer.isPlaying()) {
                        mediaPlayer.stop();
                    }
                    break;
                case R.id.btn_reset:
                    if(mediaPlayer.isPlaying()) {
                        mediaPlayer.seekTo(0);
                    } else {
                        play();
                    }
                    break;    

                default:
                    break;
                }
            } catch (Exception e) {
                Log.i("VedioPlayer", e.toString());
            }
        }

    }

    private void play() throws IOException {
        File audioFile = new File(
                Environment.getExternalStorageDirectory(), filename);
        mediaPlayer.reset();
        mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        mediaPlayer.setDisplay(sv.getHolder());
        mediaPlayer.setDataSource(audioFile.getAbsolutePath());
        mediaPlayer.prepare();
        mediaPlayer.start();
    }

}