[移动开发]Android开发之U盘开发

一、U盘插入、移除

• U盘挂载完成广播，可以进行文件读写

Intent.ACTION_MEDIA_MOUNTED
public static final String ACTION_MEDIA_MOUNTED = "android.intent.action.MEDIA_MOUNTED";

• 一般U盘会挂载在/mnt/目录下
• U盘移除广播

Intent.ACTION_MEDIA_REMOVED
public static final String ACTION_MEDIA_REMOVED = "android.intent.action.MEDIA_REMOVED";

二、U盘文件读写

1. 创建广播接收器监听U盘插入及移除（静态注册/动态注册）
2. 获取U盘挂载虚拟路径，进行文件读写操作

package com.skyworthdigital.stb.dataprovider;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

import java.io.File;

/**
 * Created by Android Studio.
 * U盘操示例
 *
 * @author: linruihang
 * @Date: 2021/10/8
 * @Time: 16:11
 */
public class UDiskReceiver extends BroadcastReceiver {
    private static final String TAG = "UDiskReceiver";

    @Override
    public void onReceive(Context context, Intent intent) {
        if (Intent.ACTION_MEDIA_MOUNTED.equals(intent.getAction())) {
            Log.d(TAG, "U盘挂载成功，可以进行读写操作！");
            //获取U盘挂载虚拟路径
            String uDiskDirPath = intent.getData().getPath();
            //U盘根目录，可以进行文件操作
            File uDiskDir = new File(uDiskDirPath);
            if (uDiskDir.canRead()) {
                //执行读操作
            }
            if (uDiskDir.canWrite()) {
                //执行写操作
            }


        } else if (Intent.ACTION_MEDIA_REMOVED.equals(intent.getAction())) {
            Log.d(TAG, "U盘移除！");
        }
    }
}

AndroidManifest.xml(静态注册方式)

<receiver android:name=".UDiskReceiver">
			<intent-filter>
				<action android:name="android.intent.action.MEDIA_MOUNTED" />
				<action android:name="android.intent.action.MEDIA_REMOVED" />
			</intent-filter>
</receiver>