Question

我对surfaceview创建有疑问。我几乎已经阅读了与此主题相关的大多数讨论，但它们都不适合我的场景。我的apk有点特别。由于某些特殊原因，我需要动态创建Relativelayout。不是通过布局xml文件然后是R.layouout。我已经将我的代码提取到一个简单的应用程序来说明我的问题。

我有2个文件，即MainActivity.java和BrowserView.java。在MainActivity.java中，我将创建一个BrowserView。该类实现了surfaceview。

我已尝试在surfaceCreated和surfaceChanged中设置断点，但到目前为止，这些事件中没有一个表明我的表面创建不成功。我有什么遗漏的吗？

我在surfaceview创作中的概念是否正确？您可以在我的代码中发现任何建议或任何问题？非常感谢！

创建Relativelayout
创建surfaceview（即BrowserView，因为它扩展了surfaceview）
Addview BrowserView到Relativelayout
在BrowserView，setFocus和addcallback

MainActivity.java

public class MainActivity extends ActionBarActivity {  

    RelativeLayout mRelativeLayout = null;  
    private BrowserView mBrowserView = null;  

@Override  
protected void onCreate(Bundle savedInstanceState) {  
    super.onCreate(savedInstanceState);  
    setContentView(R.layout.activity_main);  

    mRelativeLayout = new RelativeLayout(this);  
    setContentView(mRelativeLayout);  

    mBrowserView = new BrowserView(this);  

    // I did this because some discussion suggested that height and 
    //width should not be 0  
    RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams                         (RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);  
lp.height = 130;  
lp.width = 508;  

    mRelativeLayout.setLayoutParams(lp);  
    mRelativeLayout.addView(mBrowserView, lp);  
}  


@Override  
public boolean onCreateOptionsMenu(Menu menu) {  
    // Inflate the menu; this adds items to the action bar if it is present.  
    getMenuInflater().inflate(R.menu.main, menu);  
    return true;  
}  

@Override  
public boolean onOptionsItemSelected(MenuItem item) {  
    // Handle action bar item clicks here. The action bar will  
    // automatically handle clicks on the Home/Up button, so long  
    // as you specify a parent activity in AndroidManifest.xml.  
    int id = item.getItemId();  
    if (id == R.id.action_settings) {  
        return true;  
    }  
    return super.onOptionsItemSelected(item);  
}

}

BrowserView.java

public class BrowserView extends SurfaceView implements   SurfaceHolder.Callback {  

public BrowserView(Context context) {  
    super(context);  
    // TODO Auto-generated constructor stub  

    // make sure we get key events  
    setFocusable(true);  
    setFocusableInTouchMode(true);  
    requestFocus();  


    // make sure we get surface events  
    getHolder().addCallback(this);  

    // make sure that we support transparency  
    setZOrderOnTop(true);  
    getHolder().setFormat(PixelFormat.TRANSLUCENT);  


}  

@Override  
public void surfaceCreated(SurfaceHolder holder) {  
    // TODO Auto-generated method stub  
    Log.d("BrowserView", "surfaceCreated");  

}  

@Override  
public void surfaceChanged(SurfaceHolder holder, int format, int width,
        int height) {  
    // TODO Auto-generated method stub  
    Log.d("BrowserView", "surfaceChanged");  
}  

@Override  
public void surfaceDestroyed(SurfaceHolder holder) {  
    // TODO Auto-generated method stub  
    Log.d("BrowserView", "surfaceDestroyed");  
}  

@Override  
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)  
{  
    Rect windowRect = new Rect();  
    getWindowVisibleDisplayFrame(windowRect);  

    int width = MeasureSpec.getSize(widthMeasureSpec);  
    int height = Math.min(MeasureSpec.getSize(heightMeasureSpec),   windowRect.bottom);  

    setMeasuredDimension(width, height);  
}

}

Answer 1

在OnCreate函数中，在将BrowserView添加到相对布局中之后，将对setContentView（mRelativeLayout）的调用移动到函数的末尾。

关于surfaceview创建的问题

MainActivity.java

BrowserView.java

1 个答案: