用Handler图片轮播练习

XML代码

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    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"

    tools:context="com.example.dell.wodelianxi.Tupianlunbo">

    <ImageView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/image1"/>

</RelativeLayout>

JAVA代码

package com.example.dell.wodelianxi;

import android.os.Handler;

import android.os.Message;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.ImageView;

import java.util.Timer;

import java.util.TimerTask;

public class Tupianlunbo extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_tupianlunbo);

        final ImageView image1 = (ImageView) findViewById(R.id.image1);

        final int[] imageid = {R.drawable.touxiang1, R.drawable.touxiang2, R.drawable.touxiang13,

                R.drawable.touxiang14, R.drawable.touxiang15, R.drawable.touxiang16,

                R.drawable.touxiang17, R.drawable.touxiang18, R.drawable.touxiang19};

        final Handler handler = new Handler() {

            int i = 0;

            @Override

            public void handleMessage(Message msg) {

                super.handleMessage(msg);

                if (msg.what == 1) {

                    image1.setImageResource(imageid[i++ % imageid.length]);

                }

            }

        };

       new Timer().schedule(new TimerTask() {

           @Override

           public void run()

           {

               handler.sendEmptyMessage(1);

           }

       },0,3000);

    }

    }