installing apk

FooActivity.java

package test.installer;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;

public class InstallToolActivity extends Activity {
	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	Log.i("Demo", "onCreate");
	Intent intent = new Intent(Intent.ACTION_VIEW);
	intent.setDataAndType(Uri.parse("file://"+"/mnt/sdcard/HelloWorld.apk"), "application/vnd.android.package-archive");
	intent.addFlags(intent.FLAG_ACTIVITY_NEW_TASK);
	startActivity(intent);
    }
}

Manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="test.installer"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="11" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.INSTALL_PACKAGES"/>
    <uses-permission android:name="android.permission.RESTART_PACKAGES"/>
    

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".InstallToolActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>               
        </activity>
    </application>

</manifest>

Great