AlertDialog

package lvjian.activity;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class Ex_03_12Activity extends Activity {

private Button button1;
private Button button2;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

button1 = (Button) findViewById(R.id.button1);
button2 = (Button) findViewById(R.id.button2);
button1.setOnClickListener(new Button.OnClickListener() {

@Override
public void onClick(View v) {
new AlertDialog.Builder(Ex_03_12Activity.this)
.setTitle(R.string.app_about)
.setMessage(R.string.app_about_ms)
.setPositiveButton(R.string.app_ok,
new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog,
int which) {
System.out.println("hao");

}
}).show();

}

});
button2.setOnClickListener(new Button.OnClickListener() {

@Override
public void onClick(View v) {
new AlertDialog.Builder(Ex_03_12Activity.this)
.setTitle(R.string.app_about)
.setMessage(R.string.app_cancel)
.setPositiveButton(R.string.app_ok,
new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog,
int which) {
finish();

}
}).show();

}

});
}
}

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