重写OnMeasure方法时出错

Question

嗨，我正在用我的android应用程序播放视频，现在我想控制我的视频全屏播放，我有一个代码，但它包含错误，它说void不是变量onmeasure的有效类型，我不知道如何纠正它

public class video extends Activity {


String SrcPath =  "rtsp://v8.cache3.c.youtube.com/CjYLENy73wIaLQltaP8vg4qMsBMYDSANFEIJbXYtZ29vZ2xlSARSBXdhdGNoYOL6qv2DoMPrUAw=/0/0/0/video.3gp";

/** Called when the activity is first created. */

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.video1);


protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec){
   int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
   int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
   this.setMeasuredDimension(parentWidth/2, parentHeight);
   this.setLayoutParams(new *ParentLayoutType*.LayoutParams(parentWidth/2,parentHeight));
   super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}


VideoView myVideoView = (VideoView)findViewById(R.id.vview);
myVideoView.setVideoURI(Uri.parse(SrcPath));
myVideoView.setMediaController(new MediaController(this));
myVideoView.requestFocus();

}
 }

谢谢

Answer 1

编译问题是存在括号问题。移动

protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec){
   int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
   int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
   this.setMeasuredDimension(parentWidth/2, parentHeight);
   this.setLayoutParams(new *ParentLayoutType*.LayoutParams(parentWidth/2,parentHeight));
   super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}

所以它不在onCreate()中。现在，方法不能直接包含其他方法。

此外，onMeasure()不是Activity中的方法，而是View中的方法。您应该查看文档，以便准确地确定您想要做什么。

Answer 2

您可能希望将这两个函数作为类中的方法：

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.video1);

    // Set up the video when you create the activity
    VideoView myVideoView = (VideoView)findViewById(R.id.vview);
    myVideoView.setVideoURI(Uri.parse(SrcPath));
    myVideoView.setMediaController(new MediaController(this));
    myVideoView.requestFocus();
}

// On measure should be a different method also in the class video
protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec) {
   int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
   int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
   this.setMeasuredDimension(parentWidth/2, parentHeight);
   this.setLayoutParams(new *ParentLayoutType*.LayoutParams(parentWidth/2,parentHeight));
   super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}