屏幕尺寸，控件尺寸的获取方法

在Android中，有时需要获取内容区域，标题区域，状态区域，控件的尺寸，如长宽高，才能精确的布局，使界面更美观。下面就把各种用到的求尺寸的方法汇总，代码如下:
一、获取控件尺寸
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方法一:
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View layout = findViewById(R.id.popwindow_btn);
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ViewTreeObserver vto = layout.getViewTreeObserver();
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vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
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public boolean onPreDraw() {
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if (hasMeasured == false) {
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int btWidth = layout.getMeasuredWidth();
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int btHeight = layout.getMeasuredHeight();
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hasMeasured = true;
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}
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return true;
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}
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});
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方法二:
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ViewTreeObserver vto = mPopupBtn.getViewTreeObserver();
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vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
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@Override
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public void onGlobalLayout() {
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if (hasMeasured == false) {
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int btWidth = mPopupBtn.getMeasuredWidth();
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int btHeight = mPopupBtn.getMeasuredHeight();
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hasMeasured = true;
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}
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});
二、获取状态栏尺寸
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/**
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* 状态栏高度
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*
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* @return
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*/
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public int getStatusBarHeight() {
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Rect frame = new Rect();
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getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
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int statusBarHeight = frame.top;
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return statusBarHeight;
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}
三、获取标题栏尺寸
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/**
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* 获取标题栏高度
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*
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* @return
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*/
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public int getTitleBarHeight() {
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int statusBarHeight = getStatusBarHeight();
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int contentTop = getWindow().findViewById(Window.ID_ANDROID_CONTENT)
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.getTop();
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// statusBarHeight是上面所求的状态栏的高度
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int titleBarHeight = contentTop - statusBarHeight;
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return titleBarHeight;
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}
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public int getTitleBarHeight(){
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return getActionBar().getHeight();
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}
四、获取手机屏幕尺寸
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/**
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* 获取手机屏幕尺寸 width,height
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*
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* @return
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*/
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public int[] getScreenSize() {
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DisplayMetrics dm = new DisplayMetrics();
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// 获取屏幕信息
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getWindowManager().getDefaultDisplay().getMetrics(dm);
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int screenWidth = dm.widthPixels;
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int screenHeigh = dm.heightPixels;
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return new int[] { screenWidth, screenHeigh };
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}
五、获取内容区域尺寸
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int contentViewHeight = findViewById(android.R.id.content).getHeight(); // 屏幕内容区域高度
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