1、ProgressDialog的簡單應(yīng)用:

    ProgressDialog dialog = ProgressDialog.show(this, "hello", "are you sure???");		
		new Thread(){
			public void run() {
				try {
					Thread.sleep(5000);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				dialog.dismiss();
			};
		}.start();
  

ps:Thread.sleep不能放在主線程，否則的話ProgressDialog將不會(huì)顯示

2、AlertDialog的另一種應(yīng)用：

代碼實(shí)現(xiàn)：

    array = getResources().getStringArray(R.array.you_choice);
		new AlertDialog.Builder(this).setTitle("請(qǐng)選擇").setItems(array, new DialogInterface.OnClickListener() {			
			@Override
			public void onClick(DialogInterface dialog, int which) {
				
			}
		}).create().show();
  

定義array：res/values/Strings.xml

    <?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World!</string>
    <string name="app_name">Android_SDK_Sample</string>
    <array name="you_choice">
    	<item>牛肉</item>
    	<item>米飯</item>
    	<item>豆角</item>
    </array>
</resources>
  

3、豐富界面顯示，Theme的使用

      setTheme(R.style.Theme_AlphaTheme);
		setContentView(R.layout.ch3_19);
  

Theme_AlphaTheme定義在res/values/style.xml中

    <?xml version="1.0" encoding="utf-8"?>
<resources>	
    <style name="mystyle">
    	<item name="android:textSize">18sp</item>
    	<item name="android:textColor">#EC9237</item>
    	<item name="android:fromAlpha">0.0</item>
    	<item name="android:toAlpha">0.0</item>
    </style>
    <style name="Theme" parent="android:Theme">
    </style>    
    <style name="Theme.AlphaTheme">
    	<item name="android:background">#aaff00ff</item>
    	<item name="android:windowNoTitle">true</item>
    	<item name="android:colorForeground">@drawable/blue</item>
    	<item name="android:colorBackground">@drawable/pink</item>
    </style>
</resources>
  

4、代碼片段：
設(shè)置EditText中的文字是明文還是密文顯示。
//明文

    et.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
  

//密文

    et.setTransformationMethod(PasswordTransformationMethod.getInstance());
  

5、代碼片段：一般我們?cè)趪H化的時(shí)候，需要改變當(dāng)前系統(tǒng)的語系。程序?qū)崿F(xiàn)如下：

       Resources res = getResources();
		Configuration conf = res.getConfiguration();
		conf.locale = Locale.JAPAN;
		DisplayMetrics dm = new DisplayMetrics();
		res.updateConfiguration(conf, dm)
  

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個(gè)人android筆記(四)