android 子线程更新ui的几种方法

package com.example.administrator.test;

import android.content.Context;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ProgressBar;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    MyHandle handle;
    AlertDialog.Builder builder;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        handle = new MyHandle(this);

        Log.e("Thread-0",Thread.currentThread().getName() + '-'+Thread.currentThread().getId());

        new Thread(new Runnable() {
            @Override
            public void run() {
                Log.e("Thread-new",Thread.currentThread().getName() + '-'+Thread.currentThread().getId());
                try {
                    // 如果在子线程中不设置延时
                    // 可以直接更新
                    // 你可以写个TEXTVIEW，在子线程中直接可以更新不会报错
                    //具体百度有说明
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

                builder = new AlertDialog.Builder(MainActivity.this);

                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        builder.setTitle("2").setMessage("2").create().show();
                        Log.e("Thread-2",Thread.currentThread().getName() + '-'+Thread.currentThread().getId());
                    }
                });

                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

                handle.post(new Runnable() {
                    @Override
                    public void run() {
                        builder.setTitle("3").setMessage("3").create().show();
                        Log.e("Thread-3",Thread.currentThread().getName() + '-'+Thread.currentThread().getId());
                    }
                });

                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

                handle.sendEmptyMessage(1);

                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

                Handler ui_handle = new Handler(Looper.getMainLooper());
                ui_handle .post(new Runnable() {
                    @Override
                    public void run() {
                        builder.setTitle("6").setMessage("6").create().show();
                        Log.e("Thread-6",Thread.currentThread().getName() + '-'+Thread.currentThread().getId());
                    }
                });
            }
        }).start();
    }

    private static class MyHandle extends Handler{
        Context context;
        MyHandle(Context context){
            this.context = context;
        }

        @Override
        public void handleMessage(Message msg) {
            MainActivity a = (MainActivity) context;
            a.builder.setTitle("4").setMessage("4").create().show();
            Log.e("Thread-4",Thread.currentThread().getName() + '-'+Thread.currentThread().getId());
            super.handleMessage(msg);
        }
    }
}