文件多线程下载实现

 

布局文件

 1 - <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity">
 2 - <LinearLayout android:id="@+id/ll" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal">
 3 - <EditText android:id="@+id/pathET" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:inputType="textUri" android:text="http://192.168.1.251:8080/WebServer/FeiQ.exe">
 4   <requestFocus /> 
 5   </EditText>
 6   <ImageButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="download" android:src="@android:drawable/ic_media_play" /> 
 7   </LinearLayout>
 8   <ProgressBar android:id="@+id/downloadPB" style="?android:attr/progressBarStyleHorizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@id/ll" android:layout_marginTop="20dp" /> 
 9   <TextView android:id="@+id/percentTV" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/downloadPB" android:text="0%" /> 
10   <TextView android:id="@+id/progressTV" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_below="@id/downloadPB" android:text="0/0" /> 
11   </RelativeLayout>

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