1.错误日志：
11-25 10:29:26.583 10487-10515/myapplication.com.myblue I/ViewRootImpl: ANR Key Analyze: No Key event currently.
11-25 10:29:26.584 10487-10515/myapplication.com.myblue I/ViewRootImpl: ANR Key Analyze: Previeous Event null,finish at 1970-01-01 08:00:00.000
11-25 10:29:26.584 10487-10515/myapplication.com.myblue I/ViewRootImpl: ANR Motion Analyze: No motion event currently.
11-25 10:29:26.584 10487-10515/myapplication.com.myblue I/ViewRootImpl: ANR Motion Analyze: Previeous Event MotionEvent { action=ACTION_UP, id[0]=0, x[0]=1002.07983, y[0]=140.94196, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=224048681, downTime=224048339, deviceId=3, source=0x1002 },finish at 2016-11-25 10:26:21.164
11-25 10:29:26.706 10487-10698/myapplication.com.myblue W/Binder: Caught a RuntimeException from the binder stub implementation.
java.lang.NullPointerException: Attempt to invoke interface method 'android.os.IBinder com.mediatek.anrappmanager.IFrameworks.serviceManagerGetService(java.lang.String)' on a null object reference
at com.mediatek.anrappmanager.ANRManagerNative$1.b(SourceFile:77)
at com.mediatek.anrappmanager.ANRManagerNative$1.c(SourceFile:75)
at com.mediatek.anrappmanager.ANRManagerNative$a.get(SourceFile:97)
at com.mediatek.anrappmanager.ANRManagerNative.getDefault(SourceFile:35)
at com.mediatek.anrappmanager.ANRAppManager.dumpMessageHistory(SourceFile:59)
at android.app.ActivityThread$ApplicationThread.dumpMessageHistory(ActivityThread.java:1315)
at android.app.ApplicationThreadNative.onTransact(ApplicationThreadNative.java:687)
at android.os.Binder.execTransact(Binder.java:454)
11-25 10:29:26.706 10487-10698/myapplication.com.myblue W/System.err: java.lang.NullPointerException: Attempt to invoke interface method 'android.os.IBinder com.mediatek.anrappmanager.IFrameworks.serviceManagerGetService(java.lang.String)' on a null object reference
11-25 10:29:26.706 10487-10698/myapplication.com.myblue W/System.err: at com.mediatek.anrappmanager.ANRManagerNative$1.b(SourceFile:77)
11-25 10:29:26.706 10487-10698/myapplication.com.myblue W/System.err: at com.mediatek.anrappmanager.ANRManagerNative$1.c(SourceFile:75)
11-25 10:29:26.706 10487-10698/myapplication.com.myblue W/System.err: at com.mediatek.anrappmanager.ANRManagerNative$a.get(SourceFile:97)
11-25 10:29:26.706 10487-10698/myapplication.com.myblue W/System.err: at com.mediatek.anrappmanager.ANRManagerNative.getDefault(SourceFile:35)
11-25 10:29:26.706 10487-10698/myapplication.com.myblue W/System.err: at com.mediatek.anrappmanager.ANRAppManager.dumpMessageHistory(SourceFile:59)
11-25 10:29:26.706 10487-10698/myapplication.com.myblue W/System.err: at android.app.ActivityThread$ApplicationThread.dumpMessageHistory(ActivityThread.java:1315)
11-25 10:29:26.706 10487-10698/myapplication.com.myblue W/System.err: at android.app.ApplicationThreadNative.onTransact(ApplicationThreadNative.java:687)
11-25 10:29:26.706 10487-10698/myapplication.com.myblue W/System.err: at android.os.Binder.execTransact(Binder.java:454)2.代码：
package myapplication.com.myblue.activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Timer;
import java.util.TimerTask;
import java.util.UUID;
import myapplication.com.myblue.R;
public class Zhuye_Activity extends AppCompatActivity {
TextView textView1,textView_time,textView_lianjie;
ImageView imageView1;
EditText edittext;
Button button_send;
private BluetoothSocket btSocket = null;
private OutputStream outStream = null;
private InputStream inStream = null;
private BluetoothAdapter BA;
private String address = "";
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_zhuye);
Intent intent=getIntent();
String mac=intent.getStringExtra("mac");
String []a=mac.split("\\*");
address=a[1].trim();
initView();
textView1.setText(mac);
}
public void initView(){
BA = BluetoothAdapter.getDefaultAdapter();
BA.enable();
button_send= (Button) findViewById(R.id.button_send);
edittext= (EditText) findViewById(R.id.edittext);
textView1= (TextView) findViewById(R.id.textview1);
textView_time= (TextView) findViewById(R.id.textView_time);
SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String date = sDateFormat.format(new java.util.Date());
textView_time.setText(date);
imageView1= (ImageView) findViewById(R.id.imageView1);
textView_lianjie= (TextView) findViewById(R.id.textView_lianjie);
textView_lianjie.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
connect();
}
});
imageView1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});
button_send.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String s=edittext.getText().toString().trim();
byte[] a=s.getBytes();
try {
outStream.write(a);
} catch (IOException e) {
e.printStackTrace();
}
}
});
/**
* 创建定时器，1000ms更新一次时间
* **/
// Timer timer = new Timer();
// timer.schedule(timerTask, 0, 10000);
}
/**
* 连接蓝牙设备
*
* ***/
public void connect(){
BluetoothDevice device = BA.getRemoteDevice(address);
try {
btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
System.out.println("**109"+e.toString());
}
// BA.cancelDiscovery();
try {
btSocket.connect();
outStream = btSocket.getOutputStream();
outStream.write(0x61);
outStream.write(0x41);
inStream = btSocket.getInputStream();
System.out.println("**"+inStream.toString());
System.out.println("**"+inStream.read());
int x = inStream.read();
outStream.write(x + 1);
} catch (IOException e) {
System.out.println("**124"+e.toString());
}
try {
btSocket.close();
} catch (Exception e2) {
// Log .e(TAG,"ON RESUME: Unable to close socket during connection failure", e2);
}
}
// public void connect(){
// BA = BluetoothAdapter.getDefaultAdapter();
// BluetoothDevice device = BA.getRemoteDevice(address);
// // pairedDevices = BA.getBondedDevices();
// try {
//
// btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
//
// } catch (IOException e) {
//
// Log.d("T109",e.toString());
// }
// // BA.cancelDiscovery();
// try {
//
// // new Thread(new Runnable() {
// // @Override
// // public void run() {
// // try {
// btSocket.connect();
// outStream = btSocket.getOutputStream();
// inStream = btSocket.getInputStream();
// // } catch (IOException e) {
// // e.printStackTrace();
// // }
// // }
// // }).start();
//
//// outStream = btSocket.getOutputStream();
//// String s="guoxiwang";
//// byte by[]=s.getBytes();
//// outStream.write(12345566);
//// outStream.write(by);
////
//// outStream.write(0x61);
//// outStream.write(0x41);
//// inStream = btSocket.getInputStream();
//// System.out.println("**"+inStream.toString());
//// System.out.println("**"+inStream.read());
//// int x = inStream.read();
//// outStream.write(x + 1);
//
// } catch (Exception e) {
// }
// try {
// btSocket.close();
// } catch (IOException e2) {
//
// // Log .e(TAG,"ON RESUME: Unable to close socket during connection failure", e2);
// }
// }
/***
* handler+TimerTask 实现更新时间
*
* ***/
Handler handler=new Handler(){
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case 200:
SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String date = sDateFormat.format(new java.util.Date());
textView_time.setText(date);
break;
}
}
};
TimerTask timerTask = new TimerTask() {
@Override
public void run() {
Message message = new Message();
message.what = 200;
// message.obj = view;
handler.sendMessage(message);
}
};
}