android appwigt

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  =activityInfo.metaData.getString("app.activity.meteactivity");

        Toast.makeText(this,_getMetaData , 3000).show();

	} catch (NameNotFoundException e) {

        // TODO Auto-generated catch block

        e.printStackTrace();

    }

	}

}

　mainifest.xml　

<?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>

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