问题
How can I make the Play and Pause image buttons look as a single image button. I am hereby attaching my code below. These are the images used. i Renamed play as start.
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;
}
}
};
}
And the XML is
<?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"
style="?android:attr/progressBarStyleHorizontal"
android:id="@+id/progressbar_Horizontal"
/>
</LinearLayout>
</LinearLayout>
回答1:
Change your button to say Play at first. Combine play and pause code into one. Set and check a flag to see if play or pause is pressed and change text accordingly.
So you'll only have one button and two boolean fields:
boolean play=true, pause=false;
final Button playPause = (Button) findViewById(R.id.play);
playPause.setBackgroundResource(R.drawable.start);
playPause.setOnClickListener(mListener);
Now, in your listener code, do this:
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;
Change the text on your button accordingly.
回答2:
You can use the following code:
if(!mp.isPlaying() || isCompleted) {
isCompleted = false;
mp.start();
} else {
mp.pause();
}
add a variant:
private boolean isCompleted = true;
add listener:
mp.setOnCompletionListener(new OnCompletionListener(){
@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
isCompleted = true;
}}
);
来源：https://stackoverflow.com/questions/12951506/media-player-play-pause-in-android