android u盘插拔监听广播
时间: 2023-07-28 11:26:22 浏览: 74
android 监听
Android中可以通过注册U盘插拔监听广播来实现对U盘插拔事件的监听。具体的实现步骤如下:
1. 在AndroidManifest.xml文件中添加如下权限:
```
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
```
2. 在AndroidManifest.xml文件中添加如下广播接收器:
```
<receiver android:name=".UsbReceiver">
<intent-filter>
<action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
<action android:name="android.hardware.usb.action.USB_DEVICE_DETACHED" />
</intent-filter>
</receiver>
```
3. 在UsbReceiver.java文件中实现广播接收器:
```
public class UsbReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(UsbManager.ACTION_USB_DEVICE_ATTACHED)) {
// U盘插入
Toast.makeText(context, "U盘已插入", Toast.LENGTH_SHORT).show();
} else if (action.equals(UsbManager.ACTION_USB_DEVICE_DETACHED)) {
// U盘拔出
Toast.makeText(context, "U盘已拔出", Toast.LENGTH_SHORT).show();
}
}
}
```
注意:在Android 6.0及以上版本中,需要动态获取读取外部存储的权限。可以使用如下代码实现:
```
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
}
}
```
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