android.permission.VIBRATE
时间: 2024-01-19 20:04:41 浏览: 23
android.permission.VIBRATE 是一个 Android 系统权限,允许应用程序控制设备的振动功能。通过使用这个权限,应用程序可以在特定的操作或事件发生时触发设备振动,例如收到通知或按下按钮时。然而,为了保护用户隐私,Android 操作系统要求应用程序在运行时动态地请求这个权限,并且用户必须明确地授权才能让应用程序使用这个权限。
相关问题
Attempt to invoke virtual method 'void android.app.NotificationManager.notify(int, android.app.Notification)' on a null object referenc
这个错误是因为你尝试在一个空引用的NotificationManager对象上调用notify方法。你需要确保在调用notify方法之前,先创建一个有效的NotificationManager对象。可以使用以下代码示例来创建一个NotificationManager实例:
```java
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
```
请注意,上述代码中的`getSystemService(Context.NOTIFICATION_SERVICE)`方法返回的是一个Object类型的对象,所以需要将其强制转换为NotificationManager类型。
另外,还需要确保你的应用已经在AndroidManifest.xml文件中声明了`<uses-permission android:name="android.permission.VIBRATE" />`权限,以允许应用发送通知。
android studio温度监测
您可以使用Android Studio中的Android Sensor API来获取温度传感器的数据。首先,您需要在AndroidManifest.xml文件中添加以下权限:
```xml
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
<uses-permission android:name="android.permission.NFC" />
<uses-permission android:name="android.permission.USE_FINGERPRINT" />
<uses-permission android:name="android.permission.ACCESS_DOWNLOAD_MANAGER" />
<uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />
<uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
<uses-permission android:name="android.permission.ACCESS_NOTIFICATION_POLICY" />
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.PACKAGE_USAGE_STATS" />
<uses-permission android:name="android.permission.RECORD_VIDEO" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_PHONE_NUMBERS" />
<uses-permission android:name="android.permission.ANSWER_PHONE_CALLS" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.READ_CALL_LOG" />
<uses-permission android:name="android.permission.WRITE_CALL_LOG" />
<uses-permission android:name="android.permission.ADD_VOICEMAIL" />
<uses-permission android:name="android.permission.USE_SIP" />
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
<uses-permission android:name="android.permission.BODY_SENSORS" />
<uses-permission android:name="android.permission.READ_CALENDAR" />
<uses-permission android:name="android.permission.WRITE_CALENDAR" />
<uses-permission android:name="android.permission.ACCESS_MEDIA_LOCATION" />
```
然后,您需要在您的Activity中添加以下代码来获取温度传感器的数据:
```java
public class MainActivity extends AppCompatActivity implements SensorEventListener {
private SensorManager sensorManager;
private Sensor temperatureSensor;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
temperatureSensor = sensorManager.getDefaultSensor(Sensor.TYPE_AMBIENT_TEMPERATURE);
}
@Override
protected void onResume() {
super.onResume();
sensorManager.registerListener(this, temperatureSensor, SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
protected void onPause() {
super.onPause();
sensorManager.unregisterListener(this);
}
@Override
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() == Sensor.TYPE_AMBIENT_TEMPERATURE) {
float temperature = event.values[0];
Log.d("Temperature", "Temperature: " + temperature);
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
}
```