package com.example.test1;import android.os.Bundle;import android.app.Activity;import android.content.pm.ActivityInfo;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.content.pm.PackageManager.NameNotFoundException;import android.view.Menu;import android.widget.Toast;public class MainActivity extends Activity {	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		//setContentView(R.layout.activity_main);	ActivityInfo  activityInfo;	try {        activityInfo=getPackageManager().getActivityInfo(getComponentName(), PackageManager.GET_META_DATA);      String _getMetaData  =http://www.mamicode.com/activityInfo.metaData.getString("app.activity.meteactivity");        Toast.makeText(this,_getMetaData , 3000).show();		} catch (NameNotFoundException e) {        // TODO Auto-generated catch block        e.printStackTrace();    }			}}

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.test1"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="18" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="com.example.test1.MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>            <meta-data android:name="app.activity.meteactivity" android:value="Hello Good!"></meta-data>        </activity>    </application></manifest>