<ProgressBar
android:id="@+id/progressBar2"
style="@android:style/Widget.ProgressBar.Horizontal"
android:layout_width="268dp"
android:layout_height="wrap_content"
android:progress="45" />

<layer-listxmlns:android="http://schemas.android.com/apk/res/android"> 
<itemandroid:id="@android:id/background">
<shape>
<cornersandroid:radius="5dip"/>
<gradient
android:startColor="#ff9d9e9d"
android:centerColor="#ff5a5d5a"
android:centerY="0.75"
android:endColor="#ff747674"
android:angle="270"
/>
</shape>
</item> 
<itemandroid:id="@android:id/secondaryProgress">
<clip>
<shape>
<cornersandroid:radius="5dip"/>
<gradient
android:startColor="#80ffd300"
android:centerColor="#80ffb600"
android:centerY="0.75"
android:endColor="#a0ffcb00"
android:angle="270"
/>
</shape>
</clip>
</item> 
<itemandroid:id="@android:id/progress">
<clip>
<shape>
<cornersandroid:radius="5dip"/>
<gradient
android:startColor="#ffffd300"
android:centerColor="#ffffb600"
android:centerY="0.75"
android:endColor="#ffffcb00"
android:angle="270"
/>
</shape>
</clip>
</item>
</layer-list>

<clip
android:clipOrientation="vertical" 定義滾動的方向 vertical為垂直方向
android:drawable="@drawable/progress1" 定義進度的圖片
android:gravity="bottom" > 定義進度的開始位置
</clip> 

<?xmlversion="1.0"encoding="utf-8"?>
<layer-listxmlns:android="http://schemas.android.com/apk/res/android">
<itemandroid:id="@android:id/progress">
<clip
android:clipOrientation="vertical"
android:drawable="@drawable/progress1"
android:gravity="bottom">
</clip>
</item>
</layer-list>

<Button
android:id="@+id/btStart"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="150dp"
android:text="開始"/>
<ProgressBar
android:id="@+id/pbPic"
style="@android:style/Widget.ProgressBar.Horizontal"
android:layout_width="50dp"
android:layout_height="68dp"
android:background="@drawable/progress2"
android:max="100"
android:progress="0"
android:progressDrawable="@drawable/progress_vertical" /> <!-- 在此屬性上應(yīng)用 -->
<TextView
android:id="@+id/txtProgress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>

publicclass ProgressActivity extends Activity { 
ProgressBar pb = null;
TextView txtProgress;
Handler handler = new Handler();
@Override
publicvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
System.out.println("主題=" + getTheme() + "");
pb = (ProgressBar) findViewById(R.id.pbPic);
Button btnStart = (Button) findViewById(R.id.btStart);//按鈕
txtProgress = (TextView) findViewById(R.id.txtProgress);//顯示進度
btnStart.setOnClickListener(new OnClickListener() {//按鈕點擊事件
publicvoid onClick(View v) {
new Thread(new Runnable() {//創(chuàng)建并啟動線程，使用線程執(zhí)行模擬的任務(wù)
publicvoid run() {
for (inti = 0; i < 100; i++) { //循環(huán)100遍
try {
handler.post(new Runnable() { //更新界面的數(shù)據(jù)
publicvoid run() {
pb.incrementProgressBy(1);//增加進度
txtProgress.setText(pb.getProgress() + "%");//顯示完成的進度
}
});
Thread.sleep(100);
} catch (InterruptedException e) {
}
}
}
}).start();
}
});
}
}