Android编程实现简单流量管理功能实例

package cn.itcast.mobilesafe.ui;import java.util.List;import android.app.Activity;import android.content.Intent;import android.content.pm.PackageManager;import android.content.pm.ResolveInfo;import android.graphics.drawable.Drawable;import android.net.TrafficStats;import android.os.Bundle;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;import cn.itcast.mobilesafe.R;import cn.itcast.mobilesafe.util.TextForMater;public class TrafficManagerActivity extends Activity {  private TextView _3gTotal;  private TextView wifiTotal;  private ListView content;  private String mobileTraffic;  private String wifiTraffic;  private PackageManager pm;  private TrafficAdapter adapter;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    pm = getPackageManager();    setContentView(R.layout.traffic_manager);    _3gTotal = (TextView) this.findViewById(R.id._3gTotal);    wifiTotal = (TextView) this.findViewById(R.id.wifiTotal);    content = (ListView) this.findViewById(R.id.content);    setTotalData();    adapter = new TrafficAdapter();    content.addHeaderView(View.inflate(this, R.layout.traffic_title, null));    content.setAdapter(adapter);  }  private void setTotalData() {    long mobileRx = TrafficStats.getMobileRxBytes();    long mobileTx = TrafficStats.getMobileTxBytes();    long totalRx = TrafficStats.getTotalRxBytes();    long totalTx = TrafficStats.getTotalTxBytes();    long wifiRx = totalRx - mobileRx;    long wifiTx = totalTx - mobileTx;    mobileTraffic = TextForMater.getDataSize(mobileRx + mobileTx);    _3gTotal.setText(mobileTraffic);    wifiTraffic = TextForMater.getDataSize(wifiTx + wifiRx);    wifiTotal.setText(wifiTraffic);  }  private class TrafficAdapter extends BaseAdapter{    List<ResolveInfo> resolveInfos ;    public TrafficAdapter() {      super();      Intent intent = new Intent();      intent.setAction("android.intent.action.MAIN");      intent.addCategory("android.intent.category.LAUNCHER");      resolveInfos = pm.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);    }    @Override    public int getCount() {      return resolveInfos.size();    }    @Override    public Object getItem(int position) {      return position;    }    @Override    public long getItemId(int position) {      return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {      View view ;      if(null == convertView){        view = View.inflate(getApplicationContext(), R.layout.traffic_item, null);      }else{        view = convertView;      }      ViewHolder holder = new ViewHolder();      holder.iv_traffic_icon = (ImageView) view.findViewById(R.id.iv_traffic_icon);      holder.tv_traffic_name = (TextView) view.findViewById(R.id.tv_traffic_name);      holder.tv_traffic_tx = (TextView) view.findViewById(R.id.tv_traffic_tx);      holder.tv_traffic_rx = (TextView) view.findViewById(R.id.tv_traffic_rx);      ResolveInfo info = resolveInfos.get(position);      String appName = info.loadLabel(pm).toString();      holder.tv_traffic_name.setText(appName);      Drawable icon = info.loadIcon(pm);      holder.iv_traffic_icon.setImageDrawable(icon);      int uid = info.activityInfo.applicationInfo.uid;      holder.tv_traffic_rx.setText(TextForMater.getDataSize(TrafficStats.getUidRxBytes(uid)));      holder.tv_traffic_tx.setText(TextForMater.getDataSize(TrafficStats.getUidTxBytes(uid)));      return view;    }  }  static class ViewHolder{    ImageView iv_traffic_icon;    TextView tv_traffic_name;    TextView tv_traffic_tx;    TextView tv_traffic_rx;  }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical" >  <TableLayout    android:layout_width="fill_parent"    android:layout_height="wrap_content" >    <TableRow      android:layout_width="fill_parent"      android:layout_height="wrap_content" >      <TextView        android:layout_width="0dip"        android:layout_height="wrap_content"        android:layout_weight="1"        android:text="2G/3G总流量" />      <TextView        android:id="@+id/_3gTotal"        android:layout_width="0dip"        android:layout_height="wrap_content"        android:layout_weight="1" />    </TableRow>    <TableRow      android:layout_width="fill_parent"      android:layout_height="wrap_content" >      <TextView        android:layout_width="0dip"        android:layout_height="wrap_content"        android:layout_weight="1"        android:text="Wifi总流量" />      <TextView        android:id="@+id/wifiTotal"        android:layout_width="0dip"        android:layout_height="wrap_content"        android:layout_weight="1" />    </TableRow>  </TableLayout>  <SlidingDrawer    android:id="@+id/ll_sd_traffic"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:content="@+id/content"    android:handle="@+id/handle"    android:orientation="vertical" >    <ImageView      android:id="@id/handle"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:src="@drawable/notification" />    <ListView      android:id="@id/content"      android:layout_width="fill_parent"      android:layout_height="fill_parent" >    </ListView>  </SlidingDrawer></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:gravity="center_vertical"  android:orientation="horizontal" >  <ImageView    android:id="@+id/iv_traffic_icon"    android:layout_width="0dip"    android:layout_height="wrap_content"    android:layout_weight="1"    android:src="@drawable/ic_launcher" />  <TextView    android:id="@+id/tv_traffic_name"    android:layout_width="0dip"    android:layout_height="wrap_content"    android:layout_weight="1"    android:gravity="center_horizontal"    android:text="名称" />  <TextView    android:id="@+id/tv_traffic_tx"    android:layout_width="0dip"    android:layout_height="wrap_content"    android:layout_weight="1"    android:gravity="center_horizontal"    android:text="上传" />  <TextView    android:id="@+id/tv_traffic_rx"    android:layout_width="0dip"    android:layout_height="wrap_content"    android:layout_weight="1"    android:gravity="center_horizontal"    android:text="下载" /></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:gravity="center_vertical"  android:orientation="horizontal" >  <TextView    android:layout_width="0dip"    android:layout_height="wrap_content"    android:layout_weight="1"    android:gravity="center_horizontal"    android:text="图标" />  <TextView    android:layout_width="0dip"    android:layout_height="wrap_content"    android:layout_weight="1"    android:gravity="center_horizontal"    android:text="名称" />  <TextView    android:layout_width="0dip"    android:layout_height="wrap_content"    android:layout_weight="1"    android:gravity="center_horizontal"    android:text="上传" />  <TextView    android:layout_width="0dip"    android:layout_height="wrap_content"    android:layout_weight="1"    android:gravity="center_horizontal"    android:text="下载" /></LinearLayout>