Android视频播放器横竖屏自动切换
16lz
2021-01-26
1、功能类
package com.tongyi.edu.util;import android.app.Activity;import android.content.Context;import android.content.pm.ActivityInfo;import android.hardware.Sensor;import android.hardware.SensorEvent;import android.hardware.SensorEventListener;import android.hardware.SensorManager;import android.os.Handler;import android.os.Message;public class ScreenSwitchUtils { private volatile static ScreenSwitchUtils mInstance; private Activity mActivity; // 是否是竖屏 private boolean isPortrait = true; private SensorManager sm; private OrientationSensorListener listener; private Sensor sensor; private SensorManager sm1; private Sensor sensor1; private OrientationSensorListener1 listener1; private Handler mHandler = new Handler() { public void handleMessage(Message msg) { switch (msg.what) { case 888: int orientation = msg.arg1; if (orientation > 45 && orientation < 135) { if (isPortrait) { //切换成横屏反向:ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE mActivity.setRequestedOrientation(8); isPortrait = false; } } else if (orientation > 135 && orientation < 225) { if (!isPortrait) { /* * 切换成竖屏反向:ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT(9), * ActivityInfo.SCREEN_ORIENTATION_SENSOR:根据重力感应自动旋转 * 此处正常应该是上面第一个属性,但是在真机测试时显示为竖屏正向,所以用第二个替代 */ mActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR); isPortrait = true; } } else if (orientation > 225 && orientation < 315) { if (isPortrait) { //切换成横屏:ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE mActivity.setRequestedOrientation(0); isPortrait = false; } } else if ((orientation > 315 && orientation < 360) || (orientation > 0 && orientation < 45)) { if (!isPortrait) { //切换成竖屏ActivityInfo.SCREEN_ORIENTATION_PORTRAIT mActivity.setRequestedOrientation(1); isPortrait = true; } } break; default: break; } }; }; /** 返回ScreenSwitchUtils单例 **/ public static ScreenSwitchUtils init(Context context) { if (mInstance == null) { synchronized (ScreenSwitchUtils.class) { if (mInstance == null) { mInstance = new ScreenSwitchUtils(context); } } } return mInstance; } private ScreenSwitchUtils(Context context) { // 注册重力感应器,监听屏幕旋转 sm = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE); sensor = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); listener = new OrientationSensorListener(mHandler); // 根据 旋转之后/点击全屏之后 两者方向一致,激活sm. sm1 = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE); sensor1 = sm1.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); listener1 = new OrientationSensorListener1(); } /** 开始监听 */ public void start(Activity activity) { mActivity = activity; sm.registerListener(listener, sensor, SensorManager.SENSOR_DELAY_UI); } /** 停止监听 */ public void stop() { sm.unregisterListener(listener); sm1.unregisterListener(listener1); } /** * 手动横竖屏切换方向 */ public void toggleScreen() { sm.unregisterListener(listener); sm1.registerListener(listener1, sensor1,SensorManager.SENSOR_DELAY_UI); if (isPortrait) { isPortrait = false; // 切换成横屏 mActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); } else { isPortrait = true; // 切换成竖屏 mActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); } } public boolean isPortrait(){ return this.isPortrait; } /** * 重力感应监听者 */ public class OrientationSensorListener implements SensorEventListener { private static final int _DATA_X = 0; private static final int _DATA_Y = 1; private static final int _DATA_Z = 2; public static final int ORIENTATION_UNKNOWN = -1; private Handler rotateHandler; public OrientationSensorListener(Handler handler) { rotateHandler = handler; } public void onAccuracyChanged(Sensor arg0, int arg1) { } public void onSensorChanged(SensorEvent event) { float[] values = event.values; int orientation = ORIENTATION_UNKNOWN; float X = -values[_DATA_X]; float Y = -values[_DATA_Y]; float Z = -values[_DATA_Z]; float magnitude = X * X + Y * Y; // Don't trust the angle if the magnitude is small compared to the y // value if (magnitude * 4 >= Z * Z) { // 屏幕旋转时 float OneEightyOverPi = 57.29577957855f; float angle = (float) Math.atan2(-Y, X) * OneEightyOverPi; orientation = 90 - (int) Math.round(angle); // normalize to 0 - 359 range while (orientation >= 360) { orientation -= 360; } while (orientation < 0) { orientation += 360; } } if (rotateHandler != null) { rotateHandler.obtainMessage(888, orientation, 0).sendToTarget(); } } } public class OrientationSensorListener1 implements SensorEventListener { private static final int _DATA_X = 0; private static final int _DATA_Y = 1; private static final int _DATA_Z = 2; public static final int ORIENTATION_UNKNOWN = -1; public OrientationSensorListener1() { } public void onAccuracyChanged(Sensor arg0, int arg1) { } public void onSensorChanged(SensorEvent event) { float[] values = event.values; int orientation = ORIENTATION_UNKNOWN; float X = -values[_DATA_X]; float Y = -values[_DATA_Y]; float Z = -values[_DATA_Z]; float magnitude = X * X + Y * Y; // Don't trust the angle if the magnitude is small compared to the y // value if (magnitude * 4 >= Z * Z) { // 屏幕旋转时 float OneEightyOverPi = 57.29577957855f; float angle = (float) Math.atan2(-Y, X) * OneEightyOverPi; orientation = 90 - (int) Math.round(angle); // normalize to 0 - 359 range while (orientation >= 360) { orientation -= 360; } while (orientation < 0) { orientation += 360; } } if (orientation > 225 && orientation < 315) {// 检测到当前实际是横屏 if (!isPortrait) { sm.registerListener(listener, sensor,SensorManager.SENSOR_DELAY_UI); sm1.unregisterListener(listener1); } } else if ((orientation > 315 && orientation < 360) || (orientation > 0 && orientation < 45)) {// 检测到当前实际是竖屏 if (isPortrait) { sm.registerListener(listener, sensor,SensorManager.SENSOR_DELAY_UI); sm1.unregisterListener(listener1); } } } }}
2、使用: public class MainActivity extends Activity implements OnClickListener { private ScreenSwitchUtils instance; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); instance = ScreenSwitchUtils.init(this.getApplicationContext()); } @Override protected void onStart() { super.onStart(); instance.start(this); } @Override protected void onStop() { super.onStop(); instance.stop(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); if (instance.isPortrait()) { // 切换成竖屏 } else { // 切换成横屏 } } @Override public void onClick(View arg0) { switch (arg0.getId()) { case R.id.iv_stretch: instance.toggleScreen(); break; } }}
附:
"unspecified " | 默认值,由系统来选择方向。它的使用策略,以及由于选择时特定的上下文环境,可能会因为设备的差异而不同。 |
"user " | 使用用户当前首选的方向。 |
"behind " | 使用Activity堆栈中与该Activity之下的那个Activity的相同的方向。 |
"landscape " | 横向显示(宽度比高度要大) |
"portrait " | 纵向显示(高度比宽度要大) |
"reverseLandscape " | 与正常的横向方向相反显示,在API Level 9中被引入。 |
"reversePortrait " | 与正常的纵向方向相反显示,在API Level 9中被引入。 |
"sensorLandscape " | 横向显示,但是基于设备传感器,既可以是按正常方向显示,也可以反向显示,在API Level 9中被引入。 |
"sensorPortrait " | 纵向显示,但是基于设备传感器,既可以是按正常方向显示,也可以反向显示,在API Level 9中被引入。 |
"sensor " | 显示的方向是由设备的方向传感器来决定的。显示方向依赖与用户怎样持有设备;当用户旋转设备时,显示的方向会改变。但是,默认情况下,有些设备不会在所有的四个方向上都旋转,因此要允许在所有的四个方向上都能旋转,就要使用fullSensor属性值。 |
"fullSensor " | 显示的方向(4个方向)是由设备的方向传感器来决定的,除了它允许屏幕有4个显示方向之外,其他与设置为“sensor”时情况类似,不管什么样的设备,通常都会这么做。例如,某些设备通常不使用纵向倒转或横向反转,但是使用这个设置,还是会发生这样的反转。这个值在API Level 9中引入。 |
"nosensor " | 屏幕的显示方向不会参照物理方向传感器。传感器会被忽略,所以显示不会因用户移动设备而旋转。除了这个差别之外,系统会使用与“unspecified”设置相同的策略来旋转屏幕的方向。 |
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