Android中ProgressBar用法简单实例
本文实例讲述了Android中ProgressBar用法。分享给大家供大家参考，具体如下：
在android中会经常用到ProgressBar,下面通过举例来说明如何使用ProgressBar。
importandroid.app.Activity;
importandroid.os.Bundle;
importandroid.os.Handler;
importandroid.os.Message;
importandroid.view.View;
importandroid.view.View.OnClickListener;
importandroid.widget.Button;
importandroid.widget.ProgressBar;
publicclassA03ActivityextendsActivity{
privateProgressBarrectangle,circle;
privateButtonshowProgressBar;
privatefinalstaticintSTOP=0x10000;
privatefinalstaticintNEXT=0x10001;
privateintcount=0;
/**Calledwhentheactivityisfirstcreated.*/
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
rectangle=(ProgressBar)findViewById(R.id.rectangle);
circle=(ProgressBar)findViewById(R.id.circle);
showProgressBar=(Button)findViewById(R.id.showProgressBar);
rectangle.setIndeterminate(false);
circle.setIndeterminate(false);
showProgressBar.setOnClickListener(newOnClickListener(){
@Override
publicvoidonClick(Viewv){
//TODOAuto-generatedmethodstub
rectangle.setVisibility(View.VISIBLE);
circle.setVisibility(View.VISIBLE);
rectangle.setMax(100);
rectangle.setProgress(0);
circle.setProgress(0);
Threadt=newThread(newRunnable(){
@Override
publicvoidrun(){
//TODOAuto-generatedmethodstub
for(inti=0;i<20;i++){
try{
count=(i+1)*5;
Thread.sleep(1000);
if(count==19){
Messagemsg=newMessage();
msg.what=STOP;
handler.sendMessage(msg);
break;
}
else{
Messagemsg=newMessage();
msg.what=NEXT;
handler.sendMessage(msg);
}
}catch(InterruptedExceptione){
//TODOAuto-generatedcatchblock
e.printStackTrace();
}
}
}
});
t.start();
}
});
}
privateHandlerhandler=newHandler(){
@SuppressWarnings("static-access")
publicvoidhandleMessage(Messagemsg){
switch(msg.what){
caseSTOP:
rectangle.setVisibility(View.GONE);
circle.setVisibility(View.GONE);
Thread.currentThread().interrupt();
break;
caseNEXT:
if(!Thread.currentThread().interrupted()){
rectangle.setProgress(count);
circle.setProgress(count);
}
break;
}
}
};
}
res/layout/main.xml如下所示：
<?xmlversion="1.0"encoding="utf-8"?> <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical"> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello"/> <ProgressBar android:id="@+id/rectangle" android:layout_width="fill_parent" android:layout_height="wrap_content" style="?android:attr/progressBarStyleHorizontal" mce_style="?android:attr/progressBarStyleHorizontal" android:visibility="gone" /> <ProgressBar android:id="@+id/circle" android:layout_width="wrap_content" android:layout_height="wrap_content" style="?android:attr/progressBarStyleLarge" mce_style="?android:attr/progressBarStyleLarge" android:visibility="gone" /> <Button android:id="@+id/showProgressBar" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="showProgressBar" /> </LinearLayout>
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希望本文所述对大家Android程序设计有所帮助。