主页面布局
主页面代码
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
protected Button mBufferBtn;
protected Button mVideoBtn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.activity_main);
initView();
}
@Override
public void onClick(View view) {
Intent intent = new Intent();
if (view.getId() == R.id.button) {
intent.setClass(this, BufferActivity.class);
} else if (view.getId() == R.id.button) {
intent.setClass(this, VideoActivity.class);
}
startActivity(intent);
}
private void initView() {
mBufferBtn = (Button) findViewById(R.id.button2);
mBufferBtn.setOnClickListener(MainActivity.this);
mVideoBtn = (Button) findViewById(R.id.button2);
mVideoBtn.setOnClickListener(MainActivity.this);
}
}
SurfacrView渲染动画页面
public class BufferActivity extends AppCompatActivity implements SurfaceHolder.Callback {
protected SurfaceView mSurfaceView;
private SurfaceHolder mHolder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.activity_buffer);
initView();
initSurfaceHolder();
}
// 初始化Surface的管理者
private void initSurfaceHolder() {
mHolder = mSurfaceView.getHolder();
// 添加管理生命周期的接口回调
mHolder.addCallback(this);
}
private void initView() {
mSurfaceView = (SurfaceView) findViewById(R.id.surface_view);
}
// 缓冲区创建
@Override
public void surfaceCreated(SurfaceHolder holder) {
Log.d("1507", "surfaceCreated");
new DrawThread().start();
}
// 缓冲区内容改变（子线程渲染UI的过程）
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Log.d("1507", "surfaceChanged");
}
// 缓冲区销毁
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.d("1507", "surfaceDestroyed");
}
// 绘制UI的子线程
private class DrawThread extends Thread {
@Override
public void run() {
super.run();
// 创建画笔
Paint paint = new Paint();
paint.setColor(Color.GREEN);// 画笔颜色
paint.setStrokeWidth(10);// 画笔粗细。注意：Java中设置的尺寸单位都是px
paint.setStyle(Paint.Style.FILL_AND_STROKE);// 设置实心
paint.setAntiAlias(true);// 设置是否抗锯齿
// 获取SurfaceView的盖度
int height = mSurfaceView.getHeight();
Canvas canvas = null;
for (int i = 0; i < height; i+= 5) {
// 获取Surface中的画布
canvas = mHolder.lockCanvas();// 锁定画布
// 使用画笔在画布上绘制指定形状
canvas.drawCircle(100, i + 50, 50, paint);// 圆心x坐标，圆心y坐标，半径，画笔
// 缓冲区的画布绘制完毕，需要解锁并提交给窗口展示
mHolder.unlockCanvasAndPost(canvas);
// try {
// Thread.sleep(100);
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
}
}
}
}
渲染动画布局
SurfaceView播放视频布局
SurfaceView视频播放实现
public class VideoActivity extends AppCompatActivity implements View.OnClickListener {
protected MyVideoSurfaceView mSurfaceView;
protected Button mPlayBtn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.activity_video);
initView();
}
// 运行、可见
@Override
protected void onStart() {
super.onStart();
}
// 可交互
@Override
protected void onResume() {
super.onResume();
}
private void play() {
String videoPath = Environment.getExternalStorageDirectory().getPath() +
"/VID_20171117_144736.3gp";// 外部存储根路径
mSurfaceView.playVideo(videoPath);
}
private void initView() {
mSurfaceView = (MyVideoSurfaceView) findViewById(R.id.surface_view);
mPlayBtn = (Button) findViewById(R.id.play_btn);
mPlayBtn.setOnClickListener(VideoActivity.this);
}
@Override
public void onClick(View view) {
if (view.getId() == R.id.play_btn) {
play();
}
}
}
SurefaceView视频播放工具类
public class MyVideoSurfaceView extends SurfaceView implements SurfaceHolder.Callback {
private SurfaceHolder mHolder;
private MediaPlayer mMediaPlayer;
public MyVideoSurfaceView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
// 获取Surface换朝哪个区的持有者
mHolder = getHolder();
mHolder.addCallback(this);
}
// 设置播放源
public void playVideo(String path) {
if (mMediaPlayer == null) {
mMediaPlayer = new MediaPlayer();
}
try {
// 设置播放源
mMediaPlayer.setDataSource(path);
// 设置多媒体的显示部分：使用SurfaceHolder渲染画面
mMediaPlayer.setDisplay(mHolder);
mMediaPlayer.prepare();
mMediaPlayer.start();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
mMediaPlayer.release();
mMediaPlayer = null;
}
}