Android线程的创建和启动

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Android java多线程，线程的创建和启动。

方法一：继承Thread类创建线程类

方法二：实现Runnable接口创建线程类。

方法三：使用Callable和Future创建线程。

效果图

ThreadActivity.java

package com.example.androidthread;import java.util.concurrent.Callable;import java.util.concurrent.ExecutionException;import java.util.concurrent.FutureTask;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.widget.TextView;public class ThreadActivity extends Activity {TextView txtShow1,txtShow2,txtShow3;    @Override    protected void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_thread);        txtShow1=(TextView)findViewById(R.id.txtShow1);        txtShow2=(TextView)findViewById(R.id.txtShow2);        txtShow3=(TextView)findViewById(R.id.txtShow3);        //启动线程（继承Thread类）        new FirstThread().start();        //启动线程（实现Runnable接口）        new Thread(new SecondThread(),"Thread-2").start();        //启动线程（实现Callable接口）        FutureTask<String> task=new FutureTask<String>(new ThirdThread());        new Thread(task,"Thread-3").start();        try         {//得到call()方法返回值        txtShow3.append(task.get());} catch (InterruptedException e) {// TODO 自动生成的 catch 块e.printStackTrace();} catch (ExecutionException e) {// TODO 自动生成的 catch 块e.printStackTrace();}                   }    //继承Thread类创建线程类    public class FirstThread extends Thread    {    public void run()    {    Thread.currentThread().setName("Thread-1");    txtShow1.setText(Thread.currentThread().getName()+" extends Thread");    }    }    //实现Runnable接口创建线程类    public class SecondThread implements Runnable    {    public void run()    {    txtShow2.setText(Thread.currentThread().getName()+" implements Runnable");    }    }    //使用Callable和Future创建线程类    public class ThirdThread implements Callable<String>    {    public String call()    {      txtShow3.setText(Thread.currentThread().getName());    return " implements Callable";    }    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.thread, menu);        return true;    }    }

activity_thread.xml

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"     android:layout_height="wrap_content"><LinearLayout     android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:orientation="vertical">    <TextView        android:id="@+id/txtShow1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/hello_world" /><TextView    android:id="@+id/txtShow2"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="txtShow2"/><TextView    android:id="@+id/txtShow3"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="txtShow3"/></LinearLayout></ScrollView>

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