（Demo）—— 摇一摇启动APP

Demo说明

由于Android8.0无法对系统广播进行隐式注册，所以在8.0及以上的版本在程序不在后台运行的情况下无法直接启动APP。若各位有啥好的解决方法，可以评论告诉我，我好学习一下。

Demo下载地址：https://download.youkuaiyun.com/download/m0_37203554/10573992

MainActivity.java

注意一下设置Activity的启动方式，不然会导致摇了几次后手机上一堆MainActivity的界面

public class MainActivity extends AppCompatActivity {

    MyReceiver mMyReceiver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        /*****************************与本Demo无关*********************************/
        //过滤器
        IntentFilter mIntentFilter = new IntentFilter();
        //创建广播接收者的对象
        mIntentFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
        mIntentFilter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
        mIntentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
        mMyReceiver =  new MyReceiver();
        //注册广播接收者的对象
        try {
            unregisterReceiver(mMyReceiver);
            registerReceiver(mMyReceiver, mIntentFilter);
        } catch (Exception e) {
            e.printStackTrace();
            registerReceiver(mMyReceiver, mIntentFilter);
        }
        /*************************************************************************/
        //启动“摇一摇启动”服务
        Intent intent1 = new Intent(this,MyService.class);
        this.startService(intent1);
    }

    @Override
    protected void onStop() {
        super.onStop();
        unregisterReceiver(mMyReceiver);
    }
}

MyService.java

/**
 * “摇一摇启动”服务
 */
public class MyService extends Service {

    public MyService() {
        super();
    }

    @Override
    public void onCreate() {
        super.onCreate();
        Log.d("MyService", "onCreate");
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        Log.d("MyService", "onBind");
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.d("MyService", "onStartCommand");
        //设置加速度传感器监听
        SensorManager manager = (SensorManager) this.getSystemService(Service.SENSOR_SERVICE);
        MySensorEventListener listener = new MySensorEventListener(getApplicationContext());
        manager.registerListener(listener, manager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL);
        return super.onStartCommand(intent, flags, startId);
    }

    @Override
    public void onDestroy() {
        Log.d("MyService", "onDestroy");
        super.onDestroy();
    }

    @Override
    public boolean onUnbind(Intent intent) {
        Log.d("MyService", "onUnbind");
        return super.onUnbind(intent);
    }

}

MySensorEventListener.java

/**
 * 自定义监听用户的摇一摇手势
 */
public class MySensorEventListener implements SensorEventListener {

    private Context mContext;

    public MySensorEventListener(Context mContext) {
        this.mContext = mContext;
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        //获取传感器类型
        int sensorType = event.sensor.getType();
        //values[0]:X轴，values[1]：Y轴，values[2]：Z轴
        float[] values = event.values;
        //如果传感器类型为加速度传感器，则判断是否为摇一摇
        if(sensorType == Sensor.TYPE_ACCELEROMETER){
//            Log.d("MySensorEventListener", "onSensorChanged: x===="+values[0]+"y===="+values[1]+"z===="+values[2]);
            if ((Math.abs(values[0]) > 17 || Math.abs(values[1]) > 17 || Math.abs(values[2]) > 17))
            {
                Log.d("MySensorEventListener", "sensor x============ values[0] = " + values[0]);
                Log.d("MySensorEventListener", "sensor y============ values[1] = " + values[1]);
                Log.d("MySensorEventListener", "sensor z ============ values[2] = " + values[2]);
                //开启APP主页，注意主页的启动方式为singleTop
                Intent i = new Intent(mContext, MainActivity.class);
                mContext.startActivity(i);
            }
        }
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {

    }
}