Android体验系列之--AlertDialog

xml代码：

<?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"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/alert" android:text="Raise a Alert"></Button>
<Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/toast" android:text="Make a Toast"></Button>
</LinearLayout>
MessageDemo代码：

public class MessageDemo extends Activity implements View.OnClickListener {

Button alert;
Button toast;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
alert=(Button)findViewById(R.id.alert);
alert.setOnClickListener(this);
toast=(Button)findViewById(R.id.toast);
toast.setOnClickListener(this);
}
public void onClick(View view){
if(view==alert){
new AlertDialog.Builder(this).setMessage("eek!").setTitle("MessageDemo").setNeutralButton("Close", new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dlg,int sumthin){

}
}).show();
}
else{
Toast.makeText(this,"<click,click>",Toast.LENGTH_SHORT).show();
}
}
}

效果图：