媒体播放器在Android中播放暂停

概述如何使“播放”和“暂停”图像按钮看起来像单个图像按钮.我现在附上我的代码.这些是使用的图像.我将游戏重命名为开始.importandroid.app.Activity;importandroid.media.MediaPlayer;importandroid.net.Uri;importandroid.os.Bundle;importandroid.util.Log;importandr

如何使“播放”和“暂停”图像按钮看起来像单个图像按钮.我现在附上我的代码.这些是使用的图像.我将游戏重命名为开始.

import androID.app.Activity;import androID.media.MediaPlayer;import androID.net.Uri;import androID.os.Bundle;import androID.util.Log;import androID.vIEw.VIEw;import androID.Widget.button;import androID.Widget.Progressbar;public class AudioVIEw extends Activity{ MediaPlayer mp;    button p,pu,s,b,f,h,v,c,bu;     Progressbar myProgressbar;        Uri uri=Uri.parse("http://player.trackitdown.net/prevIEw/289245/prevIEw_c-90-feat-red-monkey-yo-dj-original-mix-dos-or-dIE-traxx.mp3");    @OverrIDe    public voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.audio_main);        Log.v("Start Of OnCreate","++");        mp=MediaPlayer.create(this,uri);        final button play = (button) findVIEwByID(R.ID.play);        play.setBackgroundResource(R.drawable.start);        final button pause = (button) findVIEwByID(R.ID.pause);        pause.setBackgroundResource(R.drawable.pause);        final button back = (button) findVIEwByID(R.ID.back);        back.setBackgroundResource(R.drawable.backward);        final button fwd = (button) findVIEwByID(R.ID.fwd);        fwd.setBackgroundResource(R.drawable.forward);        p=(button)findVIEwByID(R.ID.play);        pu=(button)findVIEwByID(R.ID.pause);        pu.setVisibility(VIEw.INVISIBLE);        //s=(button)findVIEwByID(R.ID.stop);        b=(button)findVIEwByID(R.ID.back);        f=(button)findVIEwByID(R.ID.fwd);        Log.v("button Objects","getting man");        play.setonClickListener(mListener);        pause.setonClickListener(mListener);        back.setonClickListener(mListener);        fwd.setonClickListener(mListener);        myProgressbar=(Progressbar)findVIEwByID(R.ID.progressbar_Horizontal);        myProgressbar.setProgress(0);        myProgressbar.setMax(mp.getDuration());        Log.v("End Of OnCreate","--");    }    private Runnable myThread = new Runnable(){          public voID run() {           // Todo auto-generated method stub           while ( mp.getCurrentposition()<mp.getDuration()){            try{             //myHandle.sendMessage(myHandle.obtainMessage());                  myProgressbar.setProgress( mp.getCurrentposition());                 //Thread.sleep(1000);            }            catch(Throwable t){            }           }          }            };    VIEw.OnClickListener mListener = new VIEw.OnClickListener(){        public voID onClick(VIEw v) {            switch(v.getID()){            case R.ID.play:                try {                    mp.prepare();                } catch (Exception e) {                    // Todo auto-generated catch block                    e.printstacktrace();                }                mp.start();                p.setVisibility(VIEw.INVISIBLE);                pu.setVisibility(VIEw.VISIBLE);                pu.setClickable(true);                p.setClickable(false);                   //seekbar.setProgress(mp.getCurrentposition());                   new Thread(myThread).start();                break;            case R.ID.pause:                mp.pause();                pu.setClickable(false);                p.setVisibility(VIEw.VISIBLE);                pu.setVisibility(VIEw.INVISIBLE);                p.setClickable(true);                break;            case R.ID.back:                int dur = mp.getCurrentposition();                int pos = (dur>10000 ? dur-5000:0);                mp.seekTo(pos);                break;            case R.ID.fwd:                int curpos = mp.getCurrentposition();                int dur2 = mp.getDuration();                int pos2 = (curpos+5000>dur2 ? dur2: curpos+5000);                mp.seekTo(pos2);                break;            }        }    };   }

而XML则是

<?xml version="1.0" enCoding="UTF-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"    androID:layout_wIDth="fill_parent"    androID:layout_height="fill_parent"    ><linearLayout androID:orIEntation="vertical"    androID:layout_wIDth="fill_parent"    androID:layout_height="wrap_content"    androID:layout_gravity="bottom"    androID:gravity="center"    >    <ImageVIEw androID:layout_wIDth="176dp"               androID:layout_height="208dp"               androID:src="@drawable/audio_icon"/>        <linearLayout        androID:orIEntation="horizontal"        androID:layout_wIDth="fill_parent"        androID:layout_height="wrap_content"        androID:gravity="center">        <button         androID:ID="@+ID/play"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        />        <button            androID:ID="@+ID/pause"            androID:layout_wIDth="wrap_content"            androID:layout_height="wrap_content"            androID:layout_marginleft="4dp" />        <button         androID:ID="@+ID/back"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:layout_marginleft="4dp"        />        <button         androID:ID="@+ID/fwd"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:layout_marginleft="4dp"        />    </linearLayout>    <Progressbar    androID:layout_wIDth="fill_parent"     androID:layout_height="wrap_content"         androID:ID="@+ID/progressbar_Horizontal"    /></linearLayout></linearLayout>

解决方法:

将按钮更改为首先播放.将播放和暂停代码合并为一个.设置并检查标志以查看是否按下播放或暂停并相应地更改文本.

所以你只有一个按钮和两个布尔字段：

 boolean play=true, pause=false;    final button playPause = (button) findVIEwByID(R.ID.play);            playPause.setBackgroundResource(R.drawable.start);    playPause.setonClickListener(mListener);

现在,在您的侦听器代码中,执行以下 *** 作：

case R.ID.play:            if(play)            {                play=false;                pause=true;                //change image for button                playPause.setBackgroundResource(R.drawable.start);                try {                    mp.prepare();                } catch (Exception e) {                    // Todo auto-generated catch block                    e.printstacktrace();                }                mp.start();                p.setVisibility(VIEw.INVISIBLE);                pu.setVisibility(VIEw.VISIBLE);                pu.setClickable(true);                p.setClickable(false);                   //seekbar.setProgress(mp.getCurrentposition());                   new Thread(myThread).start();                }            if(pause)            {                play=true;                pause=false;                 //change image for button                playPause.setBackgroundResource(R.drawable.pause);                mp.pause();                pu.setClickable(false);                p.setVisibility(VIEw.VISIBLE);                pu.setVisibility(VIEw.INVISIBLE);                p.setClickable(true);            }            break;

相应地更改按钮上的文本.

总结

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