Android 2.2: How to make an app to run automaticly on startup & how to make an app start another app

The topic pre开发者_运维百科tty much says it all.

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Use BroadcastReceiver that receives Intent of action BOOT_COMPLETED.

in onReceive() method create an Intent for your activity:

@Override
public void onReceive(Context context, Intent intent) {

 Intent myIntent = new Intent(context, YourActivity.class);
 context.startActivity(myIntent);
}

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For the application on startup, you need to add the permission

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

to your manifest. Then do as Vladimir wrote.

For starting another app, you need to know the (hopefully official) intent to start it. Otherwise see my reply on question calling an activity that is in another package(android)

For example, starting the LastFM app would be like this:

final Intent i = new Intent("android.intent.action.MAIN");                
i.setComponent(new ComponentName("fm.last.android","fm.last.android.LastFm"));
startActivity(i);