Analyze a simple dialog box in Android

A Simple Description Dialog BoxAndroidInstance, analyzes the principle, the following is the Code directly.

Step 1: first configure values/strings. xml in the res folder of the project

Java code:

 
 

  
  
<? Xml version = "1.0" encoding = "UTF-8"?>
  
  
<Resources>
  
  
<String name = "app_name"> normal dialog box </string>
  
  
<String name = "button"> display normal dialog box </string>
  
  
<String name = "title"> normal dialog box </string>
  
  
<String name = "OK"> OK </string>
  
  
<String name = "message"> This is a normal dialog box </string>
  
  
</Resources>
 
 

Step 2: Configure layout/main. xml in the res folder of the project to create the input box and the "show normal dialog box" button.

Java code:

 
 

  
  
<?xml version="1.0" encoding="utf-8"?> 
  
  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  
  
android:orientation="vertical" 
  
  
android:layout_width="fill_parent" 
  
  
android:layout_height="wrap_content" 
  
  
> 
  
  
<EditText android:id="@+id/editText" 
  
  
android:layout_width="fill_parent"   
  
  
android:layout_height="wrap_content"   
  
  
android:text="@string/message"/> 
  
  
<Button android:id="@+id/button" 
  
  
android:layout_width="fill_parent" 
  
  
android:layout_height="wrap_content" 
  
  
android:text="@string/button"/> 
  
  
</LinearLayout> 
 
 

Step 3: Compile the. java file under the src folder

Java code:

 
 

  
  
Package eoe. demo;
  
  
Import android. app. Activity;
  
  
Import android. app. AlertDialog;
  
  
Import android. app. AlertDialog. Builder;
  
  
Import android. app. Dialog;
  
  
Import android. content. DialogInterface;
  
  
Import android. OS. Bundle;
  
  
Import android. util. Log;
  
  
Import android. view. View;
  
  
Import android. widget. Button;
  
  
Import android. widget. EditText;
  
  
Public class CommonDialogActivity extends Activity {
  
  
Protected static final int COMMON_DIALOG = 1;
  
  
/** Called when the activity is first created .*/
  
  
@ Override
  
  
Public void onCreate (Bundle savedInstanceState ){
  
  
Super. onCreate (savedInstanceState );
  
  
SetContentView (R. layout. main );
  
  
Button button = (Button) findViewById (R. id. button );
  
  
View. OnClickListener listener = new View. OnClickListener (){
  
  
Public void onClick (View arg0 ){
  
  
// TODO Auto-generated method stub
  
  
ShowDialog (COMMON_DIALOG );
  
  
}
  
  
};
  
  
Button. setOnClickListener (listener );
  
  
}
  
  
/*
  
  
* Use onCreateDialog (int) to manage the status of the dialog box,
  
  
* When the dialog box is released,
  
  
* The status of the dialog box object will be saved by Activity. Call
  
  
* RemoveDialog (int) references all the internal references of this object.
  
  
* If removeDialog is not added as in this program,
  
  
* The first content is displayed.
  
  
*/
  
  
Protected Dialog onCreateDialog (int id ){
  
  
AlertDialog dialog = null;
  
  
EditText editText = (EditText) findViewById (R. id. editText );
  
  
Switch (id ){
  
  
Case COMMON_DIALOG:
  
  
Builder builder = new AlertDialog. Builder (this );
  
  
Builder. setIcon (R. drawable. icon );
  
  
Builder. setMessage (editText. getText ());
  
  
Builder. setTitle (R. string. title );
  
  
DialogInterface. OnClickListener listener = new DialogInterface. OnClickListener (){
  
  
Public void onClick (DialogInterface arg0, int arg1 ){
  
  
// TODO Auto-generated method stub
  
  
RemoveDialog (COMMON_DIALOG );
  
  
}
  
  
};
  
  
Builder. setPositiveButton (R. string. OK, listener );
  
  
Dialog = builder. create ();
  
  
Break;
  
  
Default:
  
  
Break;
  
  
}
  
  
Log. e ("onCreateDialog", "onCreateDialog ");
  
  
Return dialog;
  
  
}
  
  
}
 
 

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