文件结构：
hello.java的源代码：
package com.beg;
import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class hello extends Activity {
/** 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.Button01);
button.setOnClickListener(new OnClickListener(){
public void onClick(View arg0) {
openDialog();
}
});
}
private void openDialog(){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Hello");
builder.setMessage("Hello 中国移动 Android-OPhone-OMS/n");
builder.setNegativeButton("OK",null);
builder.show();
}
}
main.xml源文件：
<?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="fill_parent"
>
<Button android:id="@+id/Button01"
android:text="@string/click_me"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</Button>
</LinearLayout>
strings.xml源文件：
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">hello</string>
<string name="click_me">Click me</string>
</resources>
最终在模拟器上的效果：
