进度条（Progressbar）

//进度条
public class ProgressBarActivity extends Activity { private ProgressBar progressBarDefaultStyle1;
private ProgressBar progressBarDefaultStyle2;
private Button button; private Handler handler = new Handler(){
public void handleMessage(Message msg) {
int flag = msg.arg1;
if(flag <= 100){
progressBarDefaultStyle1.setProgress(flag);
}
if (flag <= 200) {
progressBarDefaultStyle2.setProgress(flag/2); }
if (flag==201){
progressBarDefaultStyle1.setProgress(0);
progressBarDefaultStyle2.setProgress(0);
button.setEnabled(true);
timerTask.cancel();
}
}
};
private Timer timer = new Timer();
private SendMsgTimerTask timerTask = new SendMsgTimerTask(); @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.progress_bar); progressBarDefaultStyle1 = (ProgressBar)findViewById(R.id.progressBarDefaultStyle1Id);
progressBarDefaultStyle2 = (ProgressBar)findViewById(R.id.progressBarDefaultStyle2Id);
button = (Button) findViewById(R.id.buttonId); button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
button.setEnabled(false);
timer.schedule(timerTask, 5, 100);
}
}); } class SendMsgTimerTask extends TimerTask{
int flag = 0;
public void run() {
Message msg = new Message();
msg.arg1 = ++flag;
handler.sendMessage(msg);
Log.i("msg.arg1", "发消息:"+msg.arg1);
}
} @Override
protected void onDestroy() {
super.onDestroy();
timer.cancel();
}}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="5dp" > <!-- 定义一个普通大小的环形进度条 --> <ProgressBar
android:id="@+id/progressBarInverseStyleId"
style="@android:style/Widget.ProgressBar.Inverse"
android:layout_width="wrap_content"
android:layout_height="wrap_content" /> <!-- 定义一个大环形进度条 --> <ProgressBar
android:id="@+id/progressBarLargeStyleId"
style="@android:style/Widget.ProgressBar.Large"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/progressBarInverseStyleId" /> <!-- 定义一个大环形进度条 --> <ProgressBar
android:id="@+id/progressBarLargeInverseStyleId"
style="@android:style/Widget.ProgressBar.Large.Inverse"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/progressBarLargeStyleId" /> <!-- 定义一个小环形进度条 --> <ProgressBar
android:id="@+id/progressBarSmallStyleId"
style="@android:style/Widget.ProgressBar.Small"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/progressBarLargeInverseStyleId" /> <!-- 定义一个小环形进度条 -->
<ProgressBar
android:id="@+id/progressBarSmallInverseStyleId"
style="@android:style/Widget.ProgressBar.Small.Inverse"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/progressBarSmallStyleId" /> <!-- 定义一个默认样式的水平进度条 -->
<ProgressBar
android:id="@+id/progressBarDefaultStyle1Id"
style="@android:style/Widget.ProgressBar.Horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/progressBarSmallInverseStyleId"
android:max="100" /> <!-- 定义一个指定样式的水平进度条 -->
<!-- bar_state是一个图片状态文件 -->
<ProgressBar
android:id="@+id/progressBarDefaultStyle2Id"
style="@android:style/Widget.ProgressBar.Horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/progressBarDefaultStyle1Id"
android:max="100"
android:progressDrawable="@drawable/bar_state" /> <Button
android:id="@+id/buttonId"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/progressBarDefaultStyle2Id"
android:text="模拟耗时操作" /></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<!-- 定义轨道的背景 -->
<item android:id="@android:id/background" android:drawable="@drawable/no"/>
<!-- 定义轨道的成功图像 -->
<item android:id="@android:id/progress" android:drawable="@drawable/yes"/>
</layer-list>