android 多线程 闪退,android 有关线程和Handler的问题，一起动线程APP就闪退！

//启动thread

try{

this._socket.connect();

Toast.makeText(this, "连接" + this._device.getName() + "成功！", 0).show();

this.ReadThread.start();

}

catch (IOException localIOException4) {

Toast.makeText(this, "接收数据失败！", 0).show();

//return;

}

//这是Thread

Thread ReadThread = new Thread() {

public void run() {

Message msg=new Message();

msg.obj="123";

msg.what=1;

handler.sendMessage(msg);

}

}

//这是Handler

private Handler handler =new Handler() {

@Override

public void handleMessage(Message msg) {

if(msg.what==1){

BTClient bt =new BTClient();

bt.tv.setText("123");

// bt.sv.scrollTo(0, bt.dis.getMeasuredHeight());

}

}

};