播放器页面-横竖屏切换Activity

尝试写播放器页面

...

第一步先搞清怎么做横竖屏切换

（1）强制竖屏显示；（2）强制横屏显示；（3）根据重力感应切换横竖屏

...

完成第一步，先搞清 ActivityInfo

ActivityInfo
/*保持横屏*/
ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE
/*保持竖屏*/
ActivityInfo.SCREEN_ORIENTATION_PORTRAIT7
/*根据用户朝向*/
ActivityInfo.SCREEN_ORIENTATION_USER
/*不受重力影响*/
ActivityInfo.SCREEN_ORIENTATION_NOSENSOR
/*当手机底部朝上时，根据重力变换朝向，形成相对竖屏旋转180°的效果*/
ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR
/*当手机底部朝上时，没有任何切换效果，保持上一个状态不变*/
ActivityInfo.SCREEN_ORIENTATION_SENSOR
/*横屏动态转换*/
ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE
/*竖屏动态转换*/
ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT

完成第一步，先搞清 横竖屏切换的生命周期

...

完成第一步，做横竖屏切换

<pre>

/**
* Created by alex on 2016/5/1.
*/
public class OrientationActivity extends AppCompatActivity {
private MyOrientationEventListener orientationEventListener;
private Button btAuto;
private Button bt2Land;
private Button bt2Port;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_orientation);
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    initView();
    initOrientation();
}

private void initView() {
    btAuto = (Button) findViewById(R.id.bt_auto);
    if (btAuto != null) {
        btAuto.setOnClickListener(new MyOnClickListener());
    }
    bt2Land = (Button) findViewById(R.id.bt_2_land);
    if (bt2Land != null) {
        bt2Land.setOnClickListener(new MyOnClickListener());
    }
    bt2Port = (Button) findViewById(R.id.bt_2_port);
    if (bt2Port != null) {
        bt2Port.setOnClickListener(new MyOnClickListener());
    }
}

private final class MyOnClickListener implements View.OnClickListener {
    @Override
    public void onClick(View v) {
        if (R.id.bt_auto == v.getId()) {
            /\*当手机底部朝上时，根据重力变换朝向，形成相对竖屏旋转180°的效果\*/
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR);
        } else if (R.id.bt_2_land == v.getId()) {
            /\*保持横屏\*/
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        } else if (R.id.bt_2_port == v.getId()) {
            /\*保持竖屏\*/
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        }
    }
}

private void initOrientation() {
    /\*传感器\*/
    //setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);
    orientationEventListener = new MyOrientationEventListener(this, SensorManager.SENSOR_DELAY_NORMAL);
    orientationEventListener.enable();
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    KLog.e("newConfig = " + newConfig);
    if (Configuration.ORIENTATION_LANDSCAPE == newConfig.orientation) {
        KLog.e("onConfigurationChanged :" + "landscape 横屏");
    } else if (Configuration.ORIENTATION_PORTRAIT == newConfig.orientation) {
        KLog.e("onConfigurationChanged :" + "portrait 竖屏");
    }
    int rotation = getWindowManager().getDefaultDisplay().getRotation();
    if (Surface.ROTATION_0 == rotation) {
        /\*顶部在上\*/
    } else if (Surface.ROTATION_90 == rotation) {
        /\*左边在上\*/
    } else if (Surface.ROTATION_180 == rotation) {
        /\*底部在上\*/
    } else if (Surface.ROTATION_270 == rotation) {
        /\*右边在上\*/
    }
    setContentView(R.layout.activity_orientation);
    initView();
}

private class MyOrientationEventListener extends OrientationEventListener {
    public MyOrientationEventListener(Context context) {
        super(context);
    }
    /\*\*
     \* @param context
     \* @param rate    比率  可以调节灵敏度  SensorManager.SENSOR_DELAY_FASTEST 等
     \*/
    public MyOrientationEventListener(Context context, int rate) {
        super(context, rate);
    }

    @Override
    public void onOrientationChanged(int orientation) {
        int dxOrientation = 0;
        if(orientation == OrientationEventListener.ORIENTATION_UNKNOWN) {
            /\*手机平放时，检测不到有效的角度\*/
            return;
        }else if( orientation > 350 || orientation< 10 ) {
            /\*顶部在上\*/
            dxOrientation = 0;
        } else if( orientation > 80 &&orientation < 100 ) {
            /\*左边在上\*/
            dxOrientation= 90;
        } else if( orientation > 170 &&orientation < 190 ) {
             /\*底部在上\*/
            dxOrientation= 180;
            //setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR);
        }  else if( orientation > 260 &&orientation < 280  ) {
             /\*右边在上\*/
            dxOrientation= 270;
        }  else {
            return;
        }
        KLog.e("dxOrientation = "+dxOrientation);
    }
}

@Override
protected void onDestroy() {
    super.onDestroy();
    KLog.e("onDestroy ");
    /\*必须disable 不然页面关闭后  它依然在工作 不断打印\*/
    if (orientationEventListener != null) {
        orientationEventListener.disable();
    }
}

}

</pre>

先看效果, 下载apk文件