android 线程之创建一个子线程，并在UI线程中进行交互

package littest.ghq.com.test;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.TextView;import android.widget.Toast;import com.loopj.android.http.AsyncHttpClient;import com.loopj.android.http.AsyncHttpResponseHandler;import com.loopj.android.http.RequestParams;import org.apache.http.Header;public class MainActivity extends AppCompatActivity {    private String TAG = "线程示例";    private  Button btn_start,btn_end;    private  Thread clockThread;    private TextView tvtime;    private boolean isRuning = false;    private int timer = 0;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        btn_start =(Button)findViewById(R.id.btn_start);        btn_start.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                isRuning=true;                clockThread.start();//启动这个线程            }        });        btn_end = (Button)findViewById(R.id.btn_end);        btn_end.setOnClickListener(new View.OnClickListener(){            @Override            public void onClick(View view) {               isRuning=false;            }        });        tvtime = (TextView)findViewById(R.id.tv_time);        clockThread = new Thread(new Runnable() {            @Override            public void run() {                while(isRuning){                    try{                        Thread.currentThread().sleep(1000);                        timer++;                        tvtime.post(new Runnable() {                            @Override                            public void run() {                                tvtime.setText("时间过去了："+timer+"秒");                            }                        });                    }catch (InterruptedException e){                        e.printStackTrace();                    }                }//线程结束后就不能再次执行            }        });    }}
不想写安卓想去看电影
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