如何在确定模式下使用 Android ProgressBar？
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How do I use Android ProgressBar in determinate mode?
提问by mtmurdock
I am writing a media player and i would like to have a progress bar showing the progress of the song. I found the ProgressBar class, but all i can get on the screen is a circular spinning icon. what im looking for is an actual bar.
我正在编写一个媒体播放器，我想要一个显示歌曲进度的进度条。我找到了 ProgressBar 类，但我只能在屏幕上看到一个圆形的旋转图标。我要找的是一个真正的酒吧。
How do i change the style of the ProgressBar to be a bar (not a circle) and how would i use it with MediaPlayer?
如何将 ProgressBar 的样式更改为条形（而不是圆形），以及如何将其与 MediaPlayer 一起使用？
thanks
谢谢
回答by Jorgesys
use the style ?android:attr/progressBarStyleHorizontal
使用样式 ?android:attr/progressBarStyleHorizontal
for example:
例如：
<ProgressBar android:id="@+id/progressBar"
style="?android:attr/progressBarStyleHorizontal"
and this is an example with MediaPlayer:
这是 MediaPlayer 的示例：
package com.playerpgbar;
import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
public class Player extends Activity implements Runnable, OnClickListener {
private TextView status;
private ProgressBar progressBar;
private Button startMedia;
private Button stop;
private MediaPlayer mp;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
status = (TextView) findViewById(R.id.status);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
startMedia = (Button) findViewById(R.id.startMedia);
stop = (Button) findViewById(R.id.stop);
startMedia.setOnClickListener(this);
stop.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (v.equals(startMedia)) {
if (mp != null && mp.isPlaying()) return;
mp = MediaPlayer.create(Player.this, R.raw.exodus_piranha);
mp.start();
status.setText(R.string.PlayingMedia);
progressBar.setVisibility(ProgressBar.VISIBLE);
progressBar.setProgress(0);
progressBar.setMax(mp.getDuration());
new Thread(this).start();
}
if (v.equals(stop) && mp!=null) {
mp.stop();
mp = null;
status.setText(R.string.Stopped);
progressBar.setVisibility(ProgressBar.GONE);
}
}
@Override
public void run() {
int currentPosition= 0;
int total = mp.getDuration();
while (mp!=null && currentPosition<total) {
try {
Thread.sleep(1000);
currentPosition= mp.getCurrentPosition();
} catch (InterruptedException e) {
return;
} catch (Exception e) {
return;
}
progressBar.setProgress(CurrentPosition);
}
}
}
回答by nmr
Programmatically:
以编程方式：
progressBar = new ProgressBar(activity, null, android.R.attr.progressBarStyleHorizontal);
progressBar.setIndeterminate(false);
