Android如何获取系统高度、标题栏和状态栏高度

在android应用中，有时需要计算个View的位置，导致需要计算状态栏高度，标题栏高度等信息。为以后方便，在此做个简单记录。

晒代码前先了解一下android屏幕区域的划分，如下图（该图引用自此文http://www.iteye.com/topic/828830 ）





1、 屏幕区域的获取

[java] view plaincopy

activity.getWindowManager().getDefaultDisplay();

2、应用区域的获取

[java] view plaincopy

Rect outRect = new Rect();

activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(outRect);

其中，outRect.top 即是状态栏高度。

3、view绘制区域获取

[java] view plaincopy

Rect outRect = new Rect();

activity.getWindow().findViewById(Window.ID_ANDROID_CONTENT).getDrawingRect(outRect);

用绘制区域的outRect.top - 应用区域的outRect.top 即是标题栏的高度。

注意： 如果刚启动Activity时就要计算这些数据，最好在 onWindowFocusChanged 函数中进行， 否则得到的某些数据可能是错误的，比如，应用区域高宽的获取。

详细代码如下：

[java] view plaincopy

public class ScreenSize extends Activity {

private TextView mScreenSizeView ;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_screen_size);

mScreenSizeView = (TextView) findViewById(R.id.screen_size);

}

@Override

public void onWindowFocusChanged(boolean hasFocus) {

super.onWindowFocusChanged(hasFocus);

if(hasFocus){

System.out.println("second");

StringBuilder sb = new StringBuilder();

Dimension dimen1 = getAreaOne(this);

Dimension dimen2 = getAreaTwo(this);

Dimension dimen3 = getAreaThree(this);

sb.append("Area one : \n\tWidth: "+dimen1.mWidth + ";\tHeight: "+dimen1.mHeight);

sb.append("\nArea two: \n\tWidth: "+dimen2.mWidth + ";\tHeight: "+dimen2.mHeight);

sb.append("\nArea three: \n\tWidth: "+dimen3.mWidth + ";\tHeight: "+dimen3.mHeight);

mScreenSizeView.setText(sb.toString());

}

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu.activity_screen_size, menu);

return true;

}

private Dimension getAreaOne(Activity activity){

Dimension dimen = new Dimension();

Display disp = activity.getWindowManager().getDefaultDisplay();

Point outP = new Point();

disp.getSize(outP);

dimen.mWidth = outP.x ;

dimen.mHeight = outP.y;

return dimen;

}

private Dimension getAreaTwo(Activity activity){

Dimension dimen = new Dimension();

Rect outRect = new Rect();

activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(outRect);

System.out.println("top:"+outRect.top +" ; left: "+outRect.left) ;

dimen.mWidth = outRect.width() ;

dimen.mHeight = outRect.height();

return dimen;

}

private Dimension getAreaThree(Activity activity){

Dimension dimen = new Dimension();

// 用户绘制区域

Rect outRect = new Rect();

activity.getWindow().findViewById(Window.ID_ANDROID_CONTENT).getDrawingRect(outRect);

dimen.mWidth = outRect.width() ;

dimen.mHeight = outRect.height();

// end

return dimen;

}

[java] view plaincopy

private class Dimension {

public int mWidth ;

public int mHeight ;

public Dimension(){}

}