Android 获得状态栏、标题栏以及控件的高度
ayhandsome
7年前
<p>注意，数据的获取应该在onWindowFocusChanged函数中进行，防止数据获取错误。</p> <p>首先声明整个手机屏幕的获取:</p> <pre> <code class="language-java">activity.getWindowManager().getDefaultDisplay();</code></pre> <p>声明整个应用(除了状态栏之外的区域的获取):</p> <pre> <code class="language-java">Rect outRect = new Rect(); activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(outRect); </code></pre> <p>得到除了状态栏和标题栏之外的View绘制的区域:</p> <pre> <code class="language-java">Rect outRect = new Rect(); activity.getWindow().findViewById(Window.ID_ANDROID_CONTENT).getDrawingRect(outRect); </code></pre> <p>在得到了绘制的区域之后我们来得到所要计算的高度:</p> <h2>一、状态栏的高度:</h2> <pre> <code class="language-java">Rect frame = new Rect(); getWindow().getDecorView().getWindowVisibleDisplayFrame(frame); int statusBarHeight = frame.top; </code></pre> <p>另外常用的两种方式:</p> <p>首先是反射的方式:</p> <pre> <code class="language-java">int statusBarHeight=0; try { Class clazz=Class.forName("com.android.internal.R$dimen"); Object object=clazz.newInstance(); Field field=clazz.getField("status_bar_height"); //反射出该对象中status_bar_height字段所对应的在R文件的id值 //该id值由系统工具自动生成,文档描述如下: //The desired resource identifier, as generated by the aapt tool. int id = Integer.parseInt(field.get(object).toString()); System.out.println("id="+id); //依据id值获取到状态栏的高度,单位为像素 statusBarHeight = context.getResources().getDimensionPixelSize(id); System.out.println("statusBarHeight="+statusBarHeight+"pixel"); } catch (Exception e) { }</code></pre> <p>其次:</p> <pre> <code class="language-java">int result=0; int resourceId=getResources().getIdentifier("status_bar_height","dimen","android"); if(resourceId>0){ result=getResources().getDimensionPixelSize(resourceId); } return result;</code></pre> <h2>二、得到标题栏的高度:</h2> <pre> <code class="language-java">int contentTop = getWindow().findViewById(Window.ID_ANDROID_CONTENT).getTop(); //statusBarHeight是上面所求的状态栏的高度 int titleBarHeight = contentTop - statusBarHeight</code></pre> <h2>三、两种方式得到屏幕的高度:</h2> <pre> <code class="language-java">WindowManager windowManager = getWindowManager(); Display display = windowManager.getDefaultDisplay(); screenWidth = display.getWidth(); screenHeight = display.getHeight(); </code></pre> <pre> <code class="language-java">DisplayMetrics dm = new DisplayMetrics(); this.getWindowManager().getDefaultDisplay().getMetrics(dm);//this指当前activity screenWidth =dm.widthPixels; screenHeight =dm.heightPixels</code></pre> <p>补充使得屏幕横屏的代码:</p> <pre> <code class="language-java">setRequesteOrientation(ActivityInfo.SCREEN_ORIENTATION_LADSCAPE);</code></pre> <h2>四:获取控件的宽高，一般来说，我们在onCreate里面得到的控件的宽高全是０.采用下面的方法，可以得到真实的宽高</h2> <pre> <code class="language-java">//------------------------------------------------方法一 int w = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED); int h = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED); imageView.measure(w, h); int height =imageView.getMeasuredHeight(); int width =imageView.getMeasuredWidth(); textView.append("\n"+height+","+width); 此方法会加载onMeasure三次 //-----------------------------------------------方法二 ViewTreeObserver vto = imageView.getViewTreeObserver(); vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { public boolean onPreDraw() { int height = imageView.getMeasuredHeight(); int width = imageView.getMeasuredWidth(); textView.append("\n"+height+","+width); return true; } }); 此方法会加载onMeasure二次，但是回调函数会回调很多次 //-----------------------------------------------方法三 ViewTreeObserver vto2 = imageView.getViewTreeObserver(); vto2.addOnGlobalLayoutListener(new OnGlobalLayoutListener() { @Override public void onGlobalLayout() { imageView.getViewTreeObserver().removeGlobalOnLayoutListener(this); textView.append("\n\n"+imageView.getHeight()+","+imageView.getWidth()); } }); </code></pre> <p> </p> <p>来自：http://blog.csdn.net/james_shu/article/details/53363234</p> <p> </p>