线程Thread

线程是CPU分配的最小单元

在Android 中有两种实现线程的方法：

1. 扩展java.lang.Thread类

2. 实现Runnable接口

Thread 类代表线程类，是Runnable的子类，它有两个最主要的方法：

• run()包含线程运行时，要执行的代码；
• start用于启动线程

Runnables是一个接口，实现它的run方法：

public class ToolsJava {

    String TAG = "ToolsJava";

    ToolsThread t1 = new ToolsThread();
    ToolsRunnable t2 = new ToolsRunnable();

    public void ii() {
        t1.start();
        new Thread(t2).start();
    }
}

public   class ToolsThread extends Thread {

        String TAG = "ToolsThread";

        @Override
        public void run() {

            for (int i = 0; i < 100; i++) {
                Log.e(TAG, "ToolsThread i is ： " + i);
            }

        }
    }


public   class ToolsRunnable implements Runnable {
        String TAG = "ToolsRunnable";

        @Override
        public void run() {

            for (int i = 0; i < 100; i++) {
                Log.e(TAG, "ToolsRunnable i is ： " + i);
            }

        }
    }

kotlin代码：

package com.lisxhs.kuaiyue.Test

import android.util.Log

/**
 * Created by Administrator on 2017/7/26.
 */

class ktThread : Thread {

    val TAG: String = "KTThread"

    constructor() : super()

    override fun run() {

        //访问网络
        for (i in 1..100) {
            Log.e(TAG, "KTThread i is ： " + i)
        }

        Log.e(TAG, "Thread  name is  " + this.name + "  Therad  id is  " + this.id)

    }

    override fun start() {
        super.start()
    }
}

class ktRunnable() : Runnable {

    val TAG: String = "ktRunnable"

    override fun run() {
        for (i in 100..1000) {
            Log.e(TAG, "ktRunnable i is ： " + i)
        }

        Log.e(TAG, "Thread  name is  " + Thread.currentThread().name + "  Therad  id is  " + Thread.currentThread().id)

    }
}

class Main {

    var t2 = ktRunnable()
    val t1 = ktThread().start()
    val t3 = Thread(t2).start()

}

第三种启动线程的方式

通过handler启动

package com.hyphenate.easeuisimpledemo;

import android.os.Bundle;
import android.os.Handler;
import android.util.Log;

import com.hyphenate.easeui.ui.EaseBaseActivity;

public class MainActivity extends EaseBaseActivity {

    private int count = 0;
    private String TAG = "MainActivity";
    private Handler mHandle = new Handler();
    private Runnable mRunnable = new Runnable() {
        @Override
        public void run() {
            Log.e(TAG, Thread.currentThread().getName() + Thread.currentThread().getId());
            Log.e(TAG, "count >>>" + count);
            count++;
            mHandle.postDelayed(mRunnable, 3000);//自己发送给自己，每隔3秒发一次

        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mHandle.post(mRunnable);//第一此 ，启动Runnable
    }

    @Override
    protected void onDestroy() {
        mHandle.removeCallbacks(mRunnable);//销毁线程
        super.onDestroy();
    }
}