Android 系统监听，监听USB的插拔

效果图:

Android 系统监听，监听USB的插拔_第1张图片

------------------------------------ UsbAccessoryActivity ------------------------------

package com.example.mystudydemo;import androidx.appcompat.app.AppCompatActivity;import android.app.PendingIntent;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.hardware.usb.UsbManager;import android.os.BatteryManager;import android.os.Bundle;import android.widget.TextView;import com.google.android.material.snackbar.Snackbar;public class UsbAccessoryActivity extends AppCompatActivity {    PendingIntent mPermissionIntent;    private static final String ACTION_USB_PERMISSION = "com.android.example.USB_PERMISSION";    TextView mUsbConState;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_usb_accessory);        mUsbConState = findViewById(R.id.usb_connect_state_tv);        initUsbAccessoryWidget();    }    private void initUsbAccessoryWidget() {        mPermissionIntent = PendingIntent.getBroadcast(this, 0,                new Intent(ACTION_USB_PERMISSION), 0);        IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);        filter.addAction(UsbManager.ACTION_USB_ACCESSORY_DETACHED);        filter.addAction(UsbManager.ACTION_USB_ACCESSORY_ATTACHED);        filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);        filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);        filter.addAction(Intent.ACTION_BATTERY_CHANGED);        registerReceiver(mUsbReceiver, filter);    }    private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            String action = intent.getAction();            if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {                int chargePlug = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);                boolean usbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;                if (usbCharge) {                    mUsbConState.setText("USB连接");                    Snackbar.make(mUsbConState, "It's Connected", Snackbar.LENGTH_LONG).show();                } else {                    Snackbar.make(mUsbConState, "It's No Connected", Snackbar.LENGTH_LONG).show();                    mUsbConState.setText("USB断开");                }            }        }    };}

------------------------------------ activity_usb_accessory.xml------------------------------

<?xml version="1.0" encoding="utf-8"?>

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