[Android]取得手機螢幕大小 (Display Metrics)

<GetDisplayMetrics.java>

   1: package com.android.getdisplaymetrics;

   2:  

   3: import android.app.Activity;

   4: import android.os.Bundle;

   5: import android.util.DisplayMetrics;

   6: import android.view.View;

   7: import android.view.View.OnClickListener;

   8: import android.widget.Button;

   9: import android.widget.TextView;

  10:  

  11: public class GetDisplayMetrics extends Activity {

  12:  

  13:     private TextView textviewDisplayMetrics;

  14:     private Button btnRun, btnExit;

  15:     

  16:     @Override

  17:     public void onCreate(Bundle savedInstanceState) {

  18:         super.onCreate(savedInstanceState);

  19:         setContentView(R.layout.main);

  20:         findViews();

  21:         setButtonListeners();

  22:     }

  23:     

  24:     private void findViews() {

  25:         textviewDisplayMetrics = (TextView) findViewById(R.id.displaymetricsTextView);

  26:         btnRun = (Button) findViewById(R.id.runBtn);

  27:         btnExit = (Button) findViewById(R.id.exitBtn);

  28:     }

  29:     

  30:     private void setButtonListeners() {

  31:  

  32:         btnRun.setOnClickListener(new OnClickListener(){

  33:         // 取得手機螢幕大小

  34:             public void onClick(View v) {

  35:                  getDisplayMetrics();

  36:             }

  37:         });

  38:         

  39:         btnExit.setOnClickListener(new OnClickListener(){

  40:         // 執行 【離開】

  41:             public void onClick(View v) {

  42:                 android.os.Process.killProcess(android.os.Process.myPid());

  43:             }

  44:         });

  45:     }

  46:     

  47:     private void getDisplayMetrics() {

  48:        // 取得手機螢幕大小

  49:         DisplayMetrics dm = new DisplayMetrics();

  50:         this.getWindowManager().getDefaultDisplay().getMetrics(dm);

  51:         textviewDisplayMetrics.setText(    getString(R.string.strDisplayMetrics)+

  52:                                         dm.widthPixels + " * " + dm.heightPixels);        

  53:     }

  54:     

  55: }

<main.xml>

   1: <?xml version="1.0" encoding="utf-8"?>

   2: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

   3:     android:layout_width="fill_parent"

   4:     android:layout_height="fill_parent"

   5:     android:orientation="vertical" >

   6:  

   7:     <TextView

   8:         android:id="@+id/displaymetricsTextView"

   9:         android:layout_width="fill_parent"

  10:         android:layout_height="wrap_content"

  11:         android:text="@string/strDisplayMetrics" />

  12:  

  13:     <LinearLayout

  14:         android:layout_width="match_parent"

  15:         android:layout_height="wrap_content" >

  16:  

  17:         <Button

  18:             android:id="@+id/runBtn"

  19:             android:layout_width="wrap_content"

  20:             android:layout_height="wrap_content"

  21:             android:text="@string/strExecute" />

  22:  

  23:         <Button

  24:             android:id="@+id/exitBtn"

  25:             android:layout_width="wrap_content"

  26:             android:layout_height="wrap_content"

  27:             android:text="@string/strExit" />

  28:  

  29:     </LinearLayout>

  30:  

  31: </LinearLayout>

<strings.xml>

   1: <?xml version="1.0" encoding="utf-8"?>
   2: <resources>
   3:  
   4:     <string name="hello">Hello World, GetDisplayMetrics!</string>
   5:     <string name="app_name">GetDisplayMetrics</string>
   6:     <string name="strDisplayMetrics">手機螢幕大小：</string>
   7:     <string name="strExecute">取得手機螢幕大小</string>
   8:     <string name="strExit">離開</string>
   9:  
  10: </resources>