Start a specified app

If you want to start another app directly, you can use the code intent.setClassName(PACKAGE_NAME, CLASS_NAME) to specify the expected app.
where:
- PACKAGE_NAME is the name of the package.
- CLASS_NAME is the name of the class inside the package.

For example, we have another installed app in package "com.test.AndroidSlave", we can start the activity "com.test.AndroidSlave.AndroidSlaveActivity" inside the package.

package com.test.AndroidMaster;



import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;



public class AndroidMasterActivity extends Activity {

	

	final static String PACKAGE_NAME = "com.test.AndroidSlave";

	final static String CLASS_NAME = "com.test.AndroidSlave.AndroidSlaveActivity";

	

	Button btnStartSlave;

	

   /** Called when the activity is first created. */

   @Override

   public void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);

       setContentView(R.layout.main);

       btnStartSlave = (Button)findViewById(R.id.startalave);

       btnStartSlave.setOnClickListener(new Button.OnClickListener(){



			@Override

			public void onClick(View arg0) {

				// TODO Auto-generated method stub

				startSlave();

			}});

   }

  

   private void startSlave(){

   	Intent intent = new Intent();

   	intent.setClassName(PACKAGE_NAME, CLASS_NAME);

   	startActivity(intent);

   }

}

Next post:
- Start a specified app with data passed
- Check if a app is instlled