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  • 获取屏幕分辨率以及状态栏标题栏高度最简洁的办法

    项目中经常要用到屏幕分辨率来计算控件尺寸来适应不同的屏幕,所以写一下记录下

    直接上布局:

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="@drawable/af"
        android:orientation="vertical" >
    
        <TextView
            android:id="@+id/id_txt_hello"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/hello" 
            android:textColor="#fff" />
    
        <TextView
            android:id="@+id/id_txt"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/hah"
            android:text="@string/hello" 
            android:textColor="#000" />
        
    </LinearLayout>

    直接上代码:

    public class GetStatusBarHeightDemoActivity extends Activity {
        private Window window_;
        /**当前界面根view*/
        private View view_boot_;
        
        private TextView txt_hello_;
        private TextView txt_;
        
        /**屏幕宽度*/
        private int screenWidth_;
        /**屏幕高度*/
        private int screenHeight_;
        
        /**状态栏高度*/
        private int statusBarHeight_;
        /**标题栏高度*/
        private int titleBarHeight_;
        
        /**App页面高度*/
        private int contentHeight_;
        /**App页面宽度*/
        private int contentWidth_;
        
        /** Called when the activity is first created. */
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.layout_get_status_and_title_height);
            
            txt_hello_ = (TextView)findViewById(R.id.id_txt_hello);
            txt_ = (TextView)findViewById(R.id.id_txt);
            
            Display display = getWindowManager().getDefaultDisplay(); 
            screenWidth_ = display.getWidth();
            screenHeight_ = display.getHeight();
            
            window_ = getWindow();
            /*取得系统当前显示的 view根(它是一个framelayout对象)*/
            view_boot_ = window_.findViewById(Window.ID_ANDROID_CONTENT);
          
            txt_hello_.post(new Runnable() {
                public void run() {
                    /*获取相关参数*/
                    getRelatedAttributeValue();
                }
            });
        }
        
        /**
         * 获取相关属性值
         */
        private void getRelatedAttributeValue(){
            /*定义一个区域*/
            Rect frame = new Rect();  
            /*区域范围为该textview的区域范围*/
            txt_hello_.getWindowVisibleDisplayFrame(frame);  
            /*获取状态栏高度。因为获取的区域不包含状态栏*/
            statusBarHeight_ = frame.top;  
            /*获取除了状态栏和标题内容的起始y坐标,也就是 状态栏+标题栏的高度*/
            int contentTop = view_boot_.getTop();  
            /*一减得出标题栏高度*/
            titleBarHeight_ = contentTop - statusBarHeight_;
            /*获取应用内容页面的宽度和高度*/
            contentHeight_ = view_boot_.getHeight();
            contentWidth_ = view_boot_.getWidth();
            
            txt_.setText("屏幕宽度=" + screenWidth_
                    + "\n屏幕高度=" + screenHeight_
                    + "\n状态栏高度=" + statusBarHeight_
                    + "\n标题栏高度=" + titleBarHeight_
                    + "\n应用页面高度=" + contentHeight_
                    + "\n应用页面宽度=" + contentWidth_);
        }
    }

    如果感觉这个方法获取到0,还可以参照网上的一个办法,用反射来获取:

    Class<?> c = null;
    Object obj = null;
    Field field = null;
     int x = 0, sbar = 0;
    try {
        c = Class.forName("com.android.internal.R$dimen");
        obj = c.newInstance();
        field = c.getField("status_bar_height");
        x = Integer.parseInt(field.get(obj).toString());
        sbar = getResources().getDimensionPixelSize(x);
    } catch (Exception e1) {
        e1.printStackTrace();
    }  

    这个办法在自定义控件里也很好用。

    源代码:

    http://download.csdn.net/detail/zoeice/4401559

    本文转自http://blog.csdn.net/zoeice/article/details/7703288 稍微完善下自己想要的内容,测试无误;

    2013-1-30总结

    首先,有一点需要声明,其实在android中,画布Canvas的高宽其实是屏幕的高宽。 

    如此一来,获得屏幕高宽的方法就很多了:

    1.

    WindowManager windowManager = getWindowManager();  
    Display display = windowManager.getDefaultDisplay();  
    int screenWidth = display.getWidth();  
    int screenHeight = display.getHeight();

    2.

    DisplayMetrics dm = new DisplayMetrics();
    
    this.getWindowManager().getDefaultDisplay().getMetrics(dm);//this指当前activity
    
    screenWidth =dm.widthPixels;
    
    screenHeight =dm.heightPixels;

    以上两种方法在屏幕未显示的时候,还是处于0的状态,即要在setContentView调用之后才有效。

    3.还可以在onDraw中由canvas来获得 

    screenWidth =canvas.getWidth();
    
    screenHeight =canvas.getHeight();

    而视图的高宽则是大多数人所认为的canvas的高宽,其实他所指的是除了任务栏和状态栏的高宽,主要有如下方法: 

    1.

    viewWidth=this.getWidth();
    
    viewHeight=this.getHeight();

    2.重写view的onSizeChanged,该方法会在onCreate之后,onDraw之前调用

    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    viewHeight=h;
    viewWidth=w;
    super.onSizeChanged(w, h, oldw, oldh);
    }

    本文转自:http://yuyanshan.iteye.com/blog/750043

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  • 原文地址:https://www.cnblogs.com/sishuiliuyun/p/2851630.html
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