ヒントボックス(二)
2313 ワード
1. MainActivity
2. activity_main.xml
public class MainActivity extends AppCompatActivity {
private Button mybutton = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.mybutton = (Button) super.findViewById(R.id.mybutton);
this.mybutton.setOnClickListener(new OnClickListenerImp());
}
private class OnClickListenerImp implements OnClickListener {
@Override
public void onClick(View v) {
MainActivity.this.exitDialog();
}
}
private void exitDialog() {
Dialog dialog = new AlertDialog.Builder(MainActivity.this)
.setTitle("program back?")
.setMessage("are you sure to exit this program?")
.setPositiveButton("sure",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
MainActivity.this.finish(); //end of program
}
}).setNegativeButton("cancel", //add cancel button
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).create(); //create Dialog
dialog.show(); //show Dialog
}
}
2. activity_main.xml
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/mytext"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="60dp"
android:text="hello" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="delete"
android:id="@+id/mybutton"
android:layout_below="@+id/mytext"
android:layout_centerHorizontal="true"
android:layout_marginTop="55dp" />