android文件下載進度

1. 誰知道怎樣在安卓手機通知欄里顯示下載進度條啊

通知欄顯示所用到的布局文件content_view.xml

主運行類：

packageyyy.testandroid4;

importjava.util.Timer;

importjava.util.TimerTask;

importandroid.app.Activity;

importandroid.app.AlertDialog.Builder;

importandroid.app.Notification;

importandroid.app.NotificationManager;

importandroid.app.PendingIntent;

importandroid.content.DialogInterface;

importandroid.content.Intent;

importandroid.content.pm.PackageManager.NameNotFoundException;

importandroid.os.Bundle;

importandroid.os.Handler;

importandroid.os.Message;

importandroid.view.View;

importandroid.view.View.OnClickListener;

importandroid.widget.Button;

importandroid.widget.RemoteViews;

importandroid.widget.Toast;

{

privateHandlerhandler=newHandler(){

@Override

publicvoidhandleMessage(Messagemsg){

//TODOAuto-generatedmethodstub

super.handleMessage(msg);

switch(msg.what){

case0:

notif.contentView.setTextViewText(R.id.content_view_text1,len+"%");

notif.contentView.setProgressBar(R.id.content_view_progress,100,len,false);

manager.notify(0,notif);

break;

case1:

Toast.makeText(TestAndroid4Activity.this,"下載完成",0).show();

break;

default:

break;

}

}

};

privateButtonupdate,cancel;

privateintlocalVersion,serverVersion;

privateintlen;

;

privateNotificationnotif;

/**.*/

@Override

publicvoidonCreate(BundlesavedInstanceState){

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

update=(Button)findViewById(R.id.update);

update.setOnClickListener(newOnClickListener(){

@Override

publicvoidonClick(Viewarg0){

//TODOAuto-generatedmethodstub

//點擊通知欄後打開的activity

Intentintent=newIntent(TestAndroid4Activity.this,OtherActivity.class);

PendingIntentpIntent=PendingIntent.getActivity(TestAndroid4Activity.this,0,intent,0);

manager=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);

notif=newNotification();

notif.icon=R.drawable.logo;

notif.tickerText="新通知";

//通知欄顯示所用到的布局文件

notif.contentView=newRemoteViews(getPackageName(),R.layout.content_view);

notif.contentIntent=pIntent;

manager.notify(0,notif);

newDownLoadThread().start();

}

});

}

}

{

privateTimertimer=newTimer();

@Override

publicvoidrun(){

//TODOAuto-generatedmethodstub

super.run();

timer.schele(newTimerTask(){

@Override

publicvoidrun(){

//TODOAuto-generatedmethodstub

Messagemsg=newMessage();

msg.what=0;

msg.obj=len;

handler.sendMessage(msg);

if(len==100){

timer.cancel();

handler.sendEmptyMessage(1);

}

}

},0,1000);

len=0;

try{

while(len<100){

len++;

Thread.sleep(1000);

}

}catch(InterruptedExceptione){

//TODOAuto-generatedcatchblock

e.printStackTrace();

}

}

}

}

2. android studio 一打開項目下方就又有個下載進度條，每次打開都要下載，怎麼回事啊

如果是第一次導入的項目，她會去網路倉庫下載你build.gride里導入的包比如http請求的，或者第三方組件的包。會有各種類似下載的進度條。之後打開都是檢查版本什麼的，還有初始化項目，也會耗費一定的時間