android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a vi

android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:6838) at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:947) at android.view.View.requestLayout(View.java:18882) at android.view.View.requestLayout(View.java:18882) at android.view.View.requestLayout(View.java:18882) at android.view.View.requestLayout(View.java:18882) at android.view.View.requestLayout(View.java:18882) at android.view.View.requestLayout(View.java:18882) at android.widget.RelativeLayout.requestLayout(RelativeLayout.java:367) at android.view.View.requestLayout(View.java:18882) at android.widget.TextView.checkForRelayout(TextView.java:7493) at android.widget.TextView.setText(TextView.java:4456) at android.widget.TextView.setText(TextView.java:4313) at android.widget.TextView.setText(TextView.java:4288) at com.zhangcz.androidthreadtest.MainActivity$1.run(MainActivity.java:30)
at java.lang.Thread.run(Thread.java:833)
异常出现的原因是在子线程中进行了UI更新操作
请使用异步消息处理机制

package com.zhangcz.androidthreadtest;

import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private static final String TAG = "MainActivity";
    private static final int UPDATE_TEXT = 1;
    private TextView textView;
    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what){
                case UPDATE_TEXT:
                    textView.setText("Nice to meet you");
                    break;
                default:
                    break;
            }
        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView =(TextView)findViewById(R.id.text);
        Button changText = (Button)findViewById(R.id.change_text);

        changText.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.change_text:
                new Thread(new Runnable() {
                    @Override
                    public void run() {
//                        textView.setText("Nice to meet you");
                        Message message = new Message();
                        message.what = UPDATE_TEXT;
                        handler.sendMessage(message);
                    }
                }).start();
                break;
            default:
                break;
        }
    }
}