Android——播放器和图片轮播

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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.hanqi.musicplayer.MainActivity"
    android:orientation="vertical"
    android:background="@drawable/fq">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="播放状态"
        android:textColor="#000080"
        android:id="@+id/tv_1"/>

  <ProgressBar
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      style="@android:style/Widget.ProgressBar.Horizontal"
      android:id="@+id/pb_1"/>

    <!--<SeekBar-->
        <!--android:layout_width="match_parent"-->
        <!--android:layout_height="wrap_content"-->
        <!--android:id="@+id/se_1"/>-->

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <ImageButton
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/a1"
            android:onClick="play_OnClick"/>
        <ImageButton
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/a2"
            android:onClick="pause_OnClick"/>
        <ImageButton
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/a3"
            android:onClick="stop_OnClick"/>
        <ImageButton
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/a4"
            android:onClick="exit_OnClick"/>
    </LinearLayout>

    <ImageView
        android:layout_width="330dp"
        android:layout_height="220dp"
        android:layout_gravity="center"
        android:id="@+id/iv_1"/>
    <ImageView
        android:layout_width="330dp"
        android:layout_height="220dp"
        android:layout_gravity="center"
        android:src="@drawable/gd"/>

</LinearLayout>

package com.hanqi.musicplayer;

import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    ProgressBar pb_1;
    TextView tv_1;
    //SeekBar se_1;
    ImageView iv_1;

    MediaPlayer mediaPlayer;

    Handler handler;

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

        pb_1=(ProgressBar)findViewById(R.id.pb_1);
        tv_1=(TextView)findViewById(R.id.tv_1);
        iv_1=(ImageView)findViewById(R.id.iv_1);
        //se_1=(SeekBar)findViewById(R.id.se_1);
        final int [] iv={R.drawable.f1,
                R.drawable.f2,
                R.drawable.f3,
                R.drawable.f4,
                R.drawable.f5,
                R.drawable.f6,
                R.drawable.f7,
                R.drawable.f8,
                R.drawable.f9,
                R.drawable.f10};

        //消息
        handler = new Handler(){
            @Override
            public void handleMessage(Message msg) {
                super.handleMessage(msg);

                iv_1.setImageResource(iv[msg.arg1]);
            }
        };

        //图片轮播  在分线程

        new Thread(new Runnable() {
            @Override
            public void run() {


                for (int i = 0; i < iv.length; i++)
                {

                    //iv_1.setImageResource(R.drawable.f1);

                    Message message = new Message();

                    message.what=0;
                    message.arg1=i;
                    handler.sendMessage(message);

                    try {
                        Thread.sleep(3000);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                    if (i == iv.length - 1) i = -1;
                }
            }

        }).start();



    }

    //播放
    public void play_OnClick(View v)
    {
        //构造mediaPlayer
        if (mediaPlayer == null)
        {
            //用静态方法构造
            mediaPlayer = MediaPlayer.create(this,R.raw.test);

            mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                @Override
                public void onCompletion(MediaPlayer mp) {

                    tv_1.setText("播放状态：播放完成");

                    mediaPlayer.reset();//重置
                    mediaPlayer.release();//释放

                    mediaPlayer = null;
                }
            });

            //设置进度条的最大进度
            pb_1.setMax(mediaPlayer.getDuration());

            //启动分线程
            new Thread(){
                @Override
                public void run() {

                    //循环条件
                    while (mediaPlayer!=null)
                    {
                        //更新进度
                        // 设置当前进度:和播放器的当前进度有关
                        pb_1.setProgress(mediaPlayer.getCurrentPosition());

                        try
                        {
                            Thread.sleep(500);
                        }
                        catch (Exception e)
                        {
                            e.printStackTrace();
                        }
                    }
                }
            }.start();

        }


//        new Thread(new Runnable() {
//            @Override
//            public void run() {
//                while (true) {
//
//                    pb_1.setProgress(mediaPlayer.getCurrentPosition());
//
//                    try
//                    {
//                        Thread.sleep(1000);
//                    }
//                    catch (Exception e)
//                    {
//                        e.printStackTrace();
//                    }
//
//
//                }
//            }
//        })
//                .start();

        mediaPlayer.start();

        tv_1.setText("播放状态：正在播放");
    }

    //停止
    public void stop_OnClick(View v)
    {
        if (mediaPlayer!=null)
        {
            mediaPlayer.stop();
            mediaPlayer.reset();
            mediaPlayer.release();
            mediaPlayer = null;

            pb_1.setProgress(0);

            tv_1.setText("播放状态：停止播放");
        }
    }

    //暂停
    public void pause_OnClick(View v)
    {
        if (mediaPlayer !=null&&mediaPlayer.isPlaying())
        {
            mediaPlayer.pause();

            tv_1.setText("播放状态：暂停播放");
        }
    }

    //退出
    public void exit_OnClick(View v)
    {
        stop_OnClick(v);

        finish();
    }
}