GetScreenWidth&Height

獲取Nexus7螢幕尺寸模擬結果：

MainActivity.java

import android.os.Bundle;
import android.util.DisplayMetrics;
import android.widget.TextView;
import android.app.Activity;

public class MainActivity extends Activity 
{
 int width,height,statusBarHight = 0;
 TextView tvHeight,tvWidth;
 @Override
 protected void onCreate(Bundle savedInstanceState) 
 {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  //get the screen width and height
  DisplayMetrics dm = new DisplayMetrics();
  getWindowManager().getDefaultDisplay().getMetrics(dm);
  //calculate status bar height
  int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
  if (resourceId > 0)
   statusBarHight = getResources().getDimensionPixelSize(resourceId);
  
        int vWidth = dm.widthPixels;
        int vHeight = dm.heightPixels - statusBarHight;
        if(vWidth < vHeight) 
        {
         width = vWidth;
         height = vHeight;
        } 
        else 
        {
         width = vHeight;
         height = vWidth;
        }
        //show the screen width and height 
        tvHeight = (TextView) this.findViewById(R.id.xml_tvHeight);
        tvWidth = (TextView) this.findViewById(R.id.xml_tvWidth);
        tvHeight.setText("Height: "+height);
        tvWidth.setText("Width: "+width);
 }
}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/xml_tvHeight"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignRight="@+id/xml_tvWidth"
        android:layout_marginTop="172dp"
        android:text="Height: "
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <TextView
        android:id="@+id/xml_tvWidth"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/xml_tvHeight"
        android:layout_alignParentLeft="true"
        android:layout_marginBottom="29dp"
        android:layout_marginLeft="70dp"
        android:text="Width: "
        android:textAppearance="?android:attr/textAppearanceLarge" />

</RelativeLayout>