Menu中弹出Dialog示例(一)
main.xml如下:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="请点击菜单键" /></RelativeLayout>
dialog.xml如下:
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:textSize="20sp" android:textColor="@android:color/white" android:text="this is a dialog" /></RelativeLayout>
main.xml如下:
<menu xmlns:android="http://schemas.android.com/apk/res/android" > <item android:id="@+id/exit" android:icon="@drawable/ic_launcher" android:title="退出"/> <item android:id="@+id/aboutme" android:title="About me"/></menu>
MainActivity如下:
package com.wy;import android.os.Bundle;import android.app.Activity;import android.app.AlertDialog;import android.app.AlertDialog.Builder;import android.content.DialogInterface;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuInflater;import android.view.MenuItem;import android.view.View;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {MenuInflater menuInflater = this.getMenuInflater();menuInflater.inflate(R.menu.main, menu);return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {if (item.getItemId() == R.id.exit) {finish();}if(item.getItemId() == R.id.aboutme) {AlertDialog.Builder builder = new Builder(this);LayoutInflater inflater=getLayoutInflater();View xmlView=inflater.inflate(R.layout.dialog, null);builder.setView(xmlView);AlertDialog dialog=builder.create();dialog.setIcon(R.drawable.ic_launcher);dialog.setTitle("welcome");dialog.setButton("OK",new DialogInterface.OnClickListener() {public void onClick(DialogInterface clickedDialog, int arg1) {clickedDialog.cancel();}});dialog.show();}return super.onOptionsItemSelected(item);}}