package com.hooy.apk1;import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.os.Bundle;
import android.view.MotionEvent;public class Demoapk1Activity extends Activity {@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);}@Overridepublic boolean onTouchEvent(MotionEvent event) {ComponentName componetName = new ComponentName(//这个是另外一个应用程序的包名 "com.hooy.apk2",//这个参数是要启动的Activity "com.hooy.apk2.Pay_Activity");
//        Intent intent= new Intent("chroya.foo");Intent intent= new Intent();//我们给他添加一个参数表示从apk1传过去的Bundle bundle = new Bundle();bundle.putString("arge1", "这是跳转过来的！来自apk1");intent.putExtras(bundle);intent.setComponent(componetName);startActivity(intent);return super.onTouchEvent(event);}
}

package com.hooy.apk2;import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;public class Pay_Activity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);//改变文字内容，标志这是从activity跳转过来的TextView texView= (TextView) findViewById(R.id.text1);texView.setText("我来自其他activity");Intent intent= getIntent();String value=intent.getStringExtra("arge1");if(value!=null&&!value.equals("")){texView.setText(value);//这里将显示“这是跳转过来的！来自apk1”}else{System.out.println("空的参数");}}
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.hooy.apk2"android:versionCode="1"android:versionName="1.0" ><uses-sdk android:minSdkVersion="7" /><applicationandroid:icon="@drawable/ic_launcher"android:label="@string/app_name" ><activityandroid:label="@string/app_name"android:name=".Demoapk2Activity" ><intent-filter ><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><activity android:name=".Pay_Activity"><intent-filter>   <action android:name="chroya.foo"/>   <category android:name="android.intent.category.DEFAULT"/>   </intent-filter></activity></application>
</manifest>

《启动另外的一个应用程序的Activity（三种方式）》http://www.apkbus.com/android-43480-1-1.html