實施廣播接收器(BroadcastReceiver)檢測USB大容量存儲模式(USB Mass Storage mode)

檢測USB大容量存儲(USB Mass Storage)的連接(Connected)和斷開(Disconnected)模式之間的轉換, 我們可以擴展廣播接收器(BroadcastReceiver), 處理 Intent.ACTION_UMS_CONNECTED 和 Intent.ACTION_UMS_DISCONNECTED 事件. 此事件會在通過 USB 連接和斷開時發生.



實例:

package com.AndroidUSB;



import android.app.Activity;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.os.Bundle;

import android.widget.TextView;



public class AndroidUSBActivity extends Activity {

	

	TextView umsState;

	

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        umsState = (TextView)findViewById(R.id.ums_state);

        

        registerReceiver(receiverUmsConnected, new IntentFilter(Intent.ACTION_UMS_CONNECTED));

		registerReceiver(receiverUmsDisConnected, new IntentFilter(Intent.ACTION_UMS_DISCONNECTED));

        

    }



	BroadcastReceiver receiverUmsConnected

    = new BroadcastReceiver(){



		@Override

		public void onReceive(Context arg0, Intent arg1) {

			// TODO Auto-generated method stub

			umsState.setText("USB Mass Storage Connected");

		}};

		

	BroadcastReceiver receiverUmsDisConnected

	= new BroadcastReceiver(){



		@Override

		public void onReceive(Context arg0, Intent arg1) {

			// TODO Auto-generated method stub

			umsState.setText("USB Mass Storage Disconnected");

				

		}};

}