Android notes boot from boot

In the project to use the power-on Autorun function, so learn the next, here as notes recorded.

The main is the following 4 a step:

1 , the principle of understanding:

search data found that when Android starts, a system broadcast is issued, the content is action_boot_completed, its string constants are expressed as Android.intent.action.BOOT_COMPLETED, So we just need to receive this broadcast in our own app and then launch the app .

2 , writing the receiver

since it is receiving broadcasts, it is necessary to use a broadcast receiver, so create a new one that inherits from the broadcast Broadcastreceiver class to receive the above system broadcasts specifically.

Importandroid.content.context;importandroid.content.intent; Broadcast received, boot from public classbootbroadcastreceiver extends Broadcastreceiver {    static final stringaction_boot= " Android.intent.action.BOOT_COMPLETED ";     @Override public    void OnReceive (Context context,intent Intent) {        if (intent.getaction (). Equals (Action_boot)) {            Intent autointent =newintent (context,loginactivity.class);           Autointent.addflags (intent.flag_activity_new_task);            Context.startactivity (autointent);        }     } }

The above code is to receive the broadcast, judging is the broadcast after the boot, jump to their own applications. Here is the beginning of the loginactivity.

3 , registered broadcast

in the manifest.xml when the system sends a start-up broadcast, it will enter Com.baby.activity.BootBroadcastReceiver in this class, we have just written the receiver class.

<application                 android:allowbackup= "true"       android:hardwareaccelerated= "false"       android:icon= "@ Drawable/ic_launcher "       android:label=" @string/app_name "       android:theme=" @style/apptheme "> < Receiverandroid:name= "Com.baby.activity.BootBroadcastReceiver" >                    <intent-filter>                        < Actionandroid:name= "Android.intent.action.BOOT_COMPLETED"/>                        <categoryandroid:name= " Android.intent.category.HOME "/>                    </intent-filter>            </receiver>    </application>

4 , claim permissions

When it comes to booting up, it is necessary to give this application the appropriate permissions. So Add Permissions in the Manifest.xml

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