应用开机自启动的原理是监听开机广播android.intent.action.BOOT_COMPLETED, 监听到该广播时会启动进程，进入Application

1、在Manifest中声明广播

        <receiver android:name=".server.BluetoothBootBroadcastReceiver">  
            <intent-filter>  
                <action android:name="android.intent.action.BOOT_COMPLETED"></action>  
                <category android:name="android.intent.category.DEFAULT" />  
            </intent-filter>  
        </receiver>  
    </application>

声明权限

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

 

2、广播接收类BluetoothBootBroadcastReceiver

public class BluetoothBootBroadcastReceiver extends BroadcastReceiver {
    private static final String TAG = "BluetoothBootBroadcastReceiver";
    private static final boolean DBG = true;
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)) {
            if (DBG) {
                Log.d(TAG, "onReceive BOOT_COMPLETED_ACTION");
            }
        }
    }
}

3、Application中new广播接受器

4、运行流程

Android系统启动发出ACTION_BOOT_COMPLETED时，会启动进程，BluetoothBootBroadcastReceiver收到开机广播ACTION_BOOT_COMPLETED，

然后可以在收到广播时需要的事情。