蓝牙连接问题

yhm2046 中级 2019-11-01 08:15:51
android8.1 rk3326平台

二次开发界面需要连接蓝牙，现在问题是第一次需要在手机上面连接蓝牙才能成功连接，如果在rk平台上面首次连接会不成功，但是在setting原生界面的蓝牙设置里面是成功的，请问如何解决？
logcat：

--------- beginning of main

11-01 20:07:56.875   234   234 I chatty  : uid=1000(system) /system/bin/surfaceflinger expire 14 lines

11-01 20:07:56.875   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:56.875   386   607 I WifiService: getWifiEnabledState uid=10025

11-01 20:07:56.890   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.207   234   234 I chatty  : uid=1000(system) /system/bin/surfaceflinger identical 36 lines

11-01 20:07:57.207   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.211  1349  2598 I FloatViewService: getRunningPackageNamecom.viomi.fridge.vertical

11-01 20:07:57.224   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.240   234   234 I chatty  : uid=1000(system) /system/bin/surfaceflinger identical 2 lines

11-01 20:07:57.240   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.247  1056  1304 E viomi_serial_jni: return read length =0 hex data=

11-01 20:07:57.256   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.256   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.270   386   607 D WificondControl: Scan result ready event

11-01 20:07:57.273   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.290   234   234 I chatty  : uid=1000(system) /system/bin/surfaceflinger identical 2 lines

11-01 20:07:57.291   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.314   386   537 W WifiConfigManager: Looking up network with invalid networkId -1

11-01 20:07:57.323   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.709   234   234 I chatty  : uid=1000(system) /system/bin/surfaceflinger identical 42 lines

11-01 20:07:57.710   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.728  1056  1327 I accs.InAppConn_umeng:5a7cf79cf43e481b2a00045c:  try send:DATA dataId:14 appkey:umeng:5a7cf79cf43e481b2a00045c

11-01 20:07:57.729   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.729   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.728  1056  1327 D awcn.SessionCenter: |[seq:umeng:5a7cf79cf43e481b2a00045c] getInternal u:https://umengacs.m.taobao.com TypeClass:SPDY timeout:60000

11-01 20:07:57.737  1056  1327 D awcn.StrategyCenter:  getSchemeByHost host:umengacs.m.taobao.com scheme:https

11-01 20:07:57.738  1056  1327 D awcn.SessionRequest: |[seq:umeng:5a7cf79cf43e481b2a00045c.AWCN30] SessionRequest start host:https://umengacs.m.taobao.com type:SPDY

11-01 20:07:57.746  1056  1304 E viomi_serial_jni: return read length =0 hex data=

11-01 20:07:57.749   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.749   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.765  1056  1327 D awcn.SessionRequest: |[seq:umeng:5a7cf79cf43e481b2a00045c.AWCN30] network is not available, can't create session NetworkStatusHelper.isConnected():false

11-01 20:07:57.768  1056  1327 E awcn.SessionCenter: |[seq:umeng:5a7cf79cf43e481b2a00045c] [Get]no network url:https://umengacs.m.taobao.com

11-01 20:07:57.768  1056  1327 E accs.InAppConn_umeng:5a7cf79cf43e481b2a00045c:  reSend dataid:14 retryTimes:4

11-01 20:07:57.771   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.771   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:57.774  1056  1327 D accs.InAppConn_umeng:5a7cf79cf43e481b2a00045c:  send message, DATA delay:2000 dataId:14

11-01 20:07:57.775  1056  1327 E accs.InAppConn_umeng:5a7cf79cf43e481b2a00045c:  cancel customDataId:ctrl_bindapp

11-01 20:07:57.775  1056  1327 D accs.InAppConn_umeng:5a7cf79cf43e481b2a00045c:  sendSucc false dataId:14

11-01 20:07:57.788   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:58.234   234   234 I chatty  : uid=1000(system) /system/bin/surfaceflinger identical 50 lines

11-01 20:07:58.234   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:58.248  1056  1304 E viomi_serial_jni: return read length =0 hex data=

11-01 20:07:58.251   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:58.251   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:58.259  1349  2598 I FloatViewService: getRunningPackageNamecom.viomi.fridge.vertical

11-01 20:07:58.270   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:58.490   234   234 I chatty  : uid=1000(system) /system/bin/surfaceflinger identical 26 lines

11-01 20:07:58.491   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:58.493  2696  2745 W bt_btm_ble: btm_ble_process_adv_pkt_cont device no longer discoverable, discarding advertising packet

11-01 20:07:58.507   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:58.742   234   234 I chatty  : uid=1000(system) /system/bin/surfaceflinger identical 28 lines

11-01 20:07:58.742   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:58.749  1056  1304 E viomi_serial_jni: return read length =0 hex data=

11-01 20:07:58.758   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:59.240   234   234 I chatty  : uid=1000(system) /system/bin/surfaceflinger identical 54 lines

11-01 20:07:59.240   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:59.242  1056  1303 E viomi_serial_jni: write length =8 hex data=f5 38 20 00 00 00 00 4d 

11-01 20:07:59.245  1056  1304 E viomi_serial_jni: return read length =0 hex data=

11-01 20:07:59.258   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:59.290   234   234 I chatty  : uid=1000(system) /system/bin/surfaceflinger identical 4 lines

11-01 20:07:59.290   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:59.302  1349  2598 I FloatViewService: getRunningPackageNamecom.viomi.fridge.vertical

11-01 20:07:59.306   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:59.740   234   234 I chatty  : uid=1000(system) /system/bin/surfaceflinger identical 52 lines

11-01 20:07:59.740   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:59.746  1056  1304 E viomi_serial_jni: read this time length =8 tmp=0

11-01 20:07:59.746  1056  1304 E viomi_serial_jni: return read length =8 hex data=f5 38 20 00 00 00 00 4d 

11-01 20:07:59.757   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:59.758   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:59.776  1056  1327 I accs.InAppConn_umeng:5a7cf79cf43e481b2a00045c:  try send:DATA dataId:14 appkey:umeng:5a7cf79cf43e481b2a00045c

11-01 20:07:59.777   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:59.777   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:59.786  1056  1327 D awcn.SessionCenter: |[seq:umeng:5a7cf79cf43e481b2a00045c] getInternal u:https://umengacs.m.taobao.com TypeClass:SPDY timeout:60000

11-01 20:07:59.786  1056  1327 D awcn.StrategyCenter:  getSchemeByHost host:umengacs.m.taobao.com scheme:https

11-01 20:07:59.787  1056  1327 D awcn.SessionRequest: |[seq:umeng:5a7cf79cf43e481b2a00045c.AWCN31] SessionRequest start host:https://umengacs.m.taobao.com type:SPDY

11-01 20:07:59.790   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:59.790   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:07:59.792  1056  1327 D awcn.SessionRequest: |[seq:umeng:5a7cf79cf43e481b2a00045c.AWCN31] network is not available, can't create session NetworkStatusHelper.isConnected():false

11-01 20:07:59.792  1056  1327 E awcn.SessionCenter: |[seq:umeng:5a7cf79cf43e481b2a00045c] [Get]no network url:https://umengacs.m.taobao.com

11-01 20:07:59.792  1056  1327 D accs.MsgRecv_umeng:5a7cf79cf43e481b2a00045c:  onResult command:1 erorcode:-11

11-01 20:07:59.795  1056  1327 D accs.InAppConn_umeng:5a7cf79cf43e481b2a00045c:  send message, DATA delay:2000 dataId:14

11-01 20:07:59.805  1056  1327 D accs.accs.BindAppStatistic:  eventId=66001;arg1=XbwfjNmuEsoDANYlGc7csFr9;arg2=null;arg3=221;args={ret=n, device_id=XbwfjNmuEsoDANYlGc7csFr9, fail_reasons=-11, bind_date=1572610079796, push_token=}

11-01 20:07:59.807  1056  1327 D accs.UTMini:  commitEvent fail java.lang.NoClassDefFoundError: Failed resolution of: Lcom/ut/mini/internal/UTOriginalCustomHitBuilder;

11-01 20:07:59.807  1056  1327 D accs.InAppConn_umeng:5a7cf79cf43e481b2a00045c:  sendSucc false dataId:14

11-01 20:07:59.824   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:08:00.247   234   234 I chatty  : uid=1000(system) /system/bin/surfaceflinger identical 42 lines

11-01 20:08:00.248   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:08:00.248  1056  1304 E viomi_serial_jni: return read length =0 hex data=

11-01 20:08:00.262   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:08:00.307   234   234 I chatty  : uid=1000(system) /system/bin/surfaceflinger identical 4 lines

11-01 20:08:00.307   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:08:00.330  1349  2598 I FloatViewService: getRunningPackageNamecom.viomi.fridge.vertical

11-01 20:08:00.342   234   234 E HWComposer: getPresentFence failed for invalid display -1

11-01 20:08:00.417   234   234 I chatty  : uid=1000(system) /system/bin
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yhm2046 中级 2019-11-01
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代码：
package com.cdn.bluetoothphone;

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

import java.util.List;
import java.util.Set;

import android.bluetooth.BluetoothHeadsetClient;
import android.bluetooth.BluetoothHeadsetClientCall;
import android.bluetooth.BluetoothProfile;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothProfile.ServiceListener;
import android.bluetooth.BluetoothClass;
import android.bluetooth.BluetoothHeadset;
import android.bluetooth.BluetoothA2dp;
import android.bluetooth.BluetoothA2dpSink;
import android.bluetooth.BluetoothPbapClient;

public class CallBroadcastReceiver extends BroadcastReceiver{

	public static final String TAG = "sendCallChangedIntent:wangp";
	private static final String FIND_PHONE = "com.viomi.fridge.curPhone";//查询当前连接的手机
	private static final String FIND_PHONE_RESULT = "com.viomi.fridge.curPhoneResult";//查询结果
	private static final String CONNECT_TO_PHONE = "com.viomi.fridge.connectTo";//与手机连接或断开连接
	private static final String ACTION_BOOT = "android.intent.action.BOOT_COMPLETED";//与手机连接或断开连接
	public static BluetoothDevice cur_device;			//设备
	private static BluetoothAdapter mAdapter = null;	//适配器
	private static BluetoothHeadsetClient mclient;		//蓝牙通话的相关动作,比如接听等等
	private static BluetoothPbapClient mPbapClient;	//电话薄
	
	List<BluetoothDevice> devices;
	
	@Override
	public void onReceive(Context context, Intent intent) {
		// TODO Auto-generated method stub
		if (intent.getAction().equals(BluetoothHeadsetClient.ACTION_CONNECTION_STATE_CHANGED)) {// 连接远程设备广播
			// 0:disconneted 1:connecting 2:connected 3:disconnecting
			int state = intent.getIntExtra(BluetoothProfile.EXTRA_STATE, -1);
			Log.i(TAG,"BluetoothHeadsetClient.ACTION_CONNECTION_STATE_CHANGED");
			Intent PhoneIntent = new Intent(FIND_PHONE_RESULT);
			if(state == 2){
				Log.i(TAG,"=============connected==============");
				cur_device = (BluetoothDevice) intent.getExtra(BluetoothDevice.EXTRA_DEVICE);
				PhoneIntent.putExtra("bleAddr",cur_device.getAddress());
                context.sendBroadcast(PhoneIntent);
			} else if(state == 0){
				Log.i(TAG,"=============disconnected===============");
				cur_device=null;
				PhoneIntent.putExtra("bleAddr","");
				context.sendBroadcast(PhoneIntent);
			}
		} else if (intent.getAction().equals(BluetoothHeadsetClient.ACTION_CALL_CHANGED)) {
			Log.i(TAG,"？？？？？？？？？？==BluetoothHeadsetClient.ACTION_CALL_CHANGED");
			Object state = intent.getExtra(BluetoothHeadsetClient.EXTRA_CALL);// 注：getExtra()返回Object类型
			BluetoothHeadsetClientCall ss = (BluetoothHeadsetClientCall) state;// 负责蓝牙通话的状态,比如是来电还是去电等
			Log.e(TAG, " Object = " + String.valueOf(state));
			Log.e(TAG, "ss.mId = " + String.valueOf(ss.getId()));
			Log.e(TAG, "ss.mState = " + String.valueOf(ss.getState()));// 获取来电/去电/接通/挂断等状态
			Log.e(TAG, "ss.mNumber = " + String.valueOf(ss.getNumber()));// 获取来电/去电的电话号码
			Log.e(TAG, " ss.mOutgoing = " + String.valueOf(ss.isOutgoing()));
			
			if((ss.getState() == 4) || (ss.getState() == 7) || (ss.getState() == 0)){
				
				if((ss.getState() == 0) && !(MainActivity.activityIsactive)){
					Log.e(TAG,"============2==============");
					Log.i(TAG,"==============wangp connecting===============");
				    //mclient.disconnectAudio();
					return;
				}
				if((ss.getState() == 7) && !(MainActivity.activityIsactive)) {
					Log.e(TAG,"============3==============");
					Log.i(TAG,"==============wangp disconnecting===============");
					return;
				}
				Intent mintent = new Intent(context, MainActivity.class);
				mintent.putExtra("number", String.valueOf(ss.getNumber()));
				mintent.putExtra("state", ss.getState());
				context.startActivity(mintent);
			}
			else if(MainActivity.isMeReCallFlag && ( (ss.getState() == 0))){
				//Log.e(TAG,"============11111==============");
				Log.i(TAG,"==============wangp 90===============");
				Intent mintent = new Intent(context, MainActivity.class);
				mintent.putExtra("number", String.valueOf(ss.getNumber()));
				mintent.putExtra("state", ss.getState());
				context.startActivity(mintent);
			}

		} else if (intent.getAction().equals(BluetoothHeadsetClient.ACTION_AUDIO_STATE_CHANGED)) {
			Log.i(TAG,"BluetoothHeadsetClient.ACTION_AUDIO_STATE_CHANGED");
			int state = intent.getIntExtra(BluetoothProfile.EXTRA_STATE, -1);
			Log.i(TAG,"ACTION_AUDIO_STATE_CHANGED: state = "+ String.valueOf(state));
		} else if(intent.getAction().equals(FIND_PHONE)){	
			Log.i(TAG,"FIND_PHONE");
			Intent PhoneIntent = new Intent(FIND_PHONE_RESULT);
			if(cur_device != null){
				PhoneIntent.putExtra("bleAddr",cur_device.getAddress());
				Log.i(TAG,"==============cur_device != null==============="+cur_device.getAddress());
                context.sendBroadcast(PhoneIntent);
			} else {
				Log.i(TAG,"==============cur_device == null================");
				PhoneIntent.putExtra("bleAddr","");
				context.sendBroadcast(PhoneIntent);
			}
		} else if(intent.getAction().equals(CONNECT_TO_PHONE)){	
			Log.i(TAG,"CONNECT_TO_PHONE");
			final String bleAddr=intent.getStringExtra("bleAddr");
            final String toconnect= intent.getStringExtra("status");
            Log.i(TAG,"CONNECT_TO_PHONE==========wangp bleAddr:"+bleAddr+",toconnect="+toconnect);	
			if(mAdapter == null){
				Log.i(TAG,"========mAdapter == null：bleAddr:"+bleAddr+",status:"+toconnect);
				mAdapter=BluetoothAdapter.getDefaultAdapter();
			    mAdapter.getProfileProxy(context.getApplicationContext(),mServiceListener, BluetoothProfile.HEADSET_CLIENT);	//耳机客户端
				mAdapter.getProfileProxy(context.getApplicationContext(),mServiceListener, BluetoothProfile.PBAP_CLIENT);	//电话薄对象
			}
			//返回绑定（配对）到本地适配器的BluetoothDevice对象集。
            Set<BluetoothDevice> bleDevices = mAdapter.getBondedDevices();
            for (BluetoothDevice device : bleDevices) {
            	Log.i(TAG,"=============BluetoothDevice list:===============");
                if(device.getBluetoothClass().getMajorDeviceClass() == BluetoothClass.Device.Major.PHONE
				&&device.getAddress().equals(bleAddr)){
					Log.i(TAG,"client p="+mclient);
					Log.i(TAG,"mPbapClient=="+mPbapClient);
					if(toconnect.equals("1")){	//连接成功
						Log.i(TAG,"============connected success==============");
						if(mclient != null)
							Log.i(TAG,"=====BluetoothHeadsetClient!=null==============");
							mclient.connect(device);
						if(mPbapClient !=null){
							Log.i(TAG,"======BluetoothPbapClient!=null==============");
						    mPbapClient.connect(device);
						}
					}
					else {	
						Log.i(TAG,"=========connected fail！==============");
						if(mclient != null)
							Log.i(TAG,"=========BluetoothHeadsetClient!=null===============");
							mclient.disconnect(device);
						if(mPbapClient !=null)
							Log.i(TAG,"=========BluetoothPbapClient!=null==============");
						    mPbapClient.disconnect(device);
					}
	
				
				}
			}
		} else if(intent.getAction().equals(ACTION_BOOT)){
           	    mAdapter = BluetoothAdapter.getDefaultAdapter();	//默认蓝牙适配器
				//Headset Client - HFP HF Role 耳机客户端，PBAP_CLIENT - 电话薄访问
                mAdapter.getProfileProxy(context.getApplicationContext(),mServiceListener, BluetoothProfile.HEADSET_CLIENT); //实现接口类型参数
				mAdapter.getProfileProxy(context.getApplicationContext(),mServiceListener, BluetoothProfile.PBAP_CLIENT);
				Log.i(TAG,"ACTION_BOOT");
		}
	}

//蓝牙监听器具体接口类型实现
	BluetoothProfile.ServiceListener mServiceListener = new BluetoothProfile.ServiceListener() {

	/**
		代理对象成功连接时候回调
	profile	int: - One of BluetoothProfile.HEADSET or BluetoothProfile.A2DP
	proxy	BluetoothProfile: - One of BluetoothHeadset or BluetoothA2dp
	**/
		@Override
		public void onServiceConnected(int profile, BluetoothProfile proxy) {	
			// TODO Auto-generated method stub

			if (profile == BluetoothProfile.HEADSET_CLIENT) {	//耳机客户端
				Log.i(TAG,"BluetoothProfile.HEADSET_CLIENT=========BluetoothProfile.HEADSET_CLIENT:"+profile);
				mclient=(BluetoothHeadsetClient)proxy;
				Log.i(TAG,"client p="+mclient);
				devices = mclient.getConnectedDevices();
				for (BluetoothDevice device : devices) {
					Log.i(CallBroadcastReceiver.TAG,"-------onServiceConnected------------"+device.getName());
				}
				
			}else if(profile == BluetoothProfile.PBAP_CLIENT){
				Log.i(TAG,"==============BluetoothProfile.PBAP_CLIENT:"+profile);
				mPbapClient=(BluetoothPbapClient) proxy;
				Log.i(TAG,"mPbapClient=="+mPbapClient);
			}else if(profile ==  BluetoothProfile.HEADSET){
				Log.i(TAG,"==============BluetoothProfile.HEADSET:"+profile);
			}else if(profile ==  BluetoothProfile.A2DP){
				Log.i(TAG,"==============BluetoothProfile.A2DP:"+profile);
			}
		}
		/**
		蓝牙断开回调.	profile:
		**/
		@Override
		public void onServiceDisconnected(int profile) {
			// TODO Auto-generated method stub
			Log.i(TAG,"-------onServiceDisconnected:------------"+profile);
			if (profile == BluetoothProfile.HEADSET_CLIENT) {
				Log.i(TAG,"==============wangp 201===============");
				mclient = null;
			}else if(profile == BluetoothProfile.PBAP_CLIENT){
				Log.i(TAG,"==============wangp 204===============");
				mPbapClient= null;
			}else if(profile ==  BluetoothProfile.HEADSET){
				Log.i(TAG,"==============BluetoothProfile.HEADSET："+profile);
			}else if(profile ==  BluetoothProfile.A2DP){
				Log.i(TAG,"==============BluetoothProfile.A2DP："+profile);
			}

    	}
    };

}
android BlueToothDemo （蓝牙搜索，配对，连接，传输）详细讲解见博客
详细讲解见博客地址：http://blog.csdn.net/yehui928186846/article/details/52710112
android手机蓝牙自动配对，连接，互发消息示例
内含可直接附加的项目，一个说明文档，代码中注释齐全 程序功能： 1.一台手机运行程序后选择服务端，自动打开蓝牙及蓝牙被发现（手机的打开蓝牙被发现功能需要人工确认），等待被连接 2.另一台手机运行程序后选择客户端，自动搜索选择了服务端的手机，进行自动配对（第一次手机之间的配对需要人工确认，后面不需要），并自动连接。这时在两台手机上均可看见连接成功，然后可以互发消息进行聊天 3.程序退出后自动关闭蓝牙 PS：谁有蓝牙快速连接的例子（根据蓝牙波段进行连接，无需配对，直接连接，类似蓝牙耳机）请与作者联系，谢谢
Android蓝牙手机通信程序
Android蓝牙手机通信程序demo，实现手机通过蓝牙发送简单控制指令给单片机的蓝牙模块AND 蓝牙版的手机扣扣互聊，2部手机通过蓝牙通信~ 完整的project+code
andrid 蓝牙开发 bluetooth
android 蓝牙简单通信，蓝牙开发。
android bluetooth demo 蓝牙样例
只是一个蓝牙的小demo。注释和解释都很全。还有说明。希望对想写蓝牙小程序的童鞋有帮助。高手就不用看了。这个是很简单的小样例!上一次发的有点问题。这一次发的是对的。。喜欢的自己下吧！
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