android sendbroadcast intent 传值,android service和activity通信sendBroadcast报错nullpointerexeption...

service中总是获取不到context,sendBroadcast报空指针异常

`public class HandleMessage extends Service{

private String qrcontent = null;

private Context context = this;

@Override

public void onCreate() {

super.onCreate();

context = this;

}

public void doSomething(final String content){

qrcontent = content;

new Thread(new Runnable() {

@Override

public void run() {

//发送广播

Intent intent=new Intent();

intent.putExtra("qrcontent", qrcontent);

intent.setAction("com.HandleMessage");

if(intent != null){

LocalBroadcastManager.getInstance(context).sendBroadcast(intent);

}else{

Log.e("---","null intent");

}

}

}).start();

}

}`