类似程序管理器、进程管理器里的软件信息、进程信息，设置一个TrafficInfo结构体来表示流量信息：
package com.example.mobilesafe.engine;
import android.graphics.drawable.Drawable;
/**
* Created by sing on 14-1-26.
* desc:
*/
public class TrafficInfo {
private static final String TAG = "TrafficInfo";
//应用的包名
private String packname;
//应用的名称
private String appname;
//上传的数据
private long tx;
//下载的数据
private long rx;
//应用图标
private Drawable icon;
public String getPackname() {
return packname;
}
public void setPackname(String packname) {
this.packname = packname;
}
public String getAppname() {
return appname;
}
public void setAppname(String appname) {
this.appname = appname;
}
public long getTx() {
return tx;
}
public void setTx(long tx) {
this.tx = tx;
}
public long getRx() {
return rx;
}
public void setRx(long rx) {
this.rx = rx;
}
public Drawable getIcon() {
return icon;
}
public void setIcon(Drawable icon) {
this.icon = icon;
}
}获取流量信息的TrafficInfoProvider：
package com.example.mobilesafe.engine;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.net.TrafficStats;
import java.util.ArrayList;
import java.util.List;
/**
* Created by sing on 14-1-26.
* desc:
*/
public class TrafficInfoProvider {
private static final String TAG = "TrafficInfoProvider";
private PackageManager pm;
private Context context;
public TrafficInfoProvider(Context context) {
this.context = context;
pm = context.getPackageManager();
}
/**
* 返回所有的有互联网访问权限的应用程序的流量信息。
*
* @return
*/
public List<TrafficInfo> getTrafficInfos() {
//获取到配置权限信息的应用程序
List<PackageInfo> packinfos = pm.getInstalledPackages(PackageManager.GET_PERMISSIONS);
//存放具有Internet权限信息的应用
List<TrafficInfo> trafficInfos = new ArrayList<TrafficInfo>();
for (PackageInfo packinfo : packinfos) {
//获取该应用的所有权限信息
String[] permissions = packinfo.requestedPermissions;
if (permissions != null && permissions.length > 0) {
for (String permission : permissions) {
//筛选出具有Internet权限的应用程序
if ("android.permission.INTERNET".equals(permission)) {
//用于封装具有Internet权限的应用程序信息
TrafficInfo trafficInfo = new TrafficInfo();
//封装应用信息
trafficInfo.setPackname(packinfo.packageName);
trafficInfo.setIcon(packinfo.applicationInfo.loadIcon(pm));
trafficInfo.setAppname(packinfo.applicationInfo.loadLabel(pm).toString());
//获取到应用的uid（user id）
int uid = packinfo.applicationInfo.uid;
//TrafficStats对象通过应用的uid来获取应用的下载、上传流量信息
trafficInfo.setRx(TrafficStats.getUidRxBytes(uid));
trafficInfo.setTx(TrafficStats.getUidTxBytes(uid));
trafficInfos.add(trafficInfo);
trafficInfo = null;
break;
}
}
}
}
return trafficInfos;
}
}原理是获取具有internet权限的程序。
TrafficInfoActivity代码：
package com.example.mobilesafe;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.text.format.Formatter;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import com.example.mobilesafe.engine.TrafficInfo;
import com.example.mobilesafe.engine.TrafficInfoProvider;
import java.util.List;
/**
* Created by sing on 14-1-26.
* desc:
*/
public class TrafficInfoActivity extends Activity {
//展示数据列表
private ListView lv;
//获取到所有具有Intenet权限的应用的流量信息
private TrafficInfoProvider provider;
//ProgressBar和TextView（正在加载...）的父控件，用于控制其显示
private View ll_loading;
//封装单个具有Intenet权限的应用的流量信息
private List<TrafficInfo> trafficInfos;
//处理子线程发送过来的消息，更新UI
private Handler handler = new Handler(){
public void handleMessage(android.os.Message msg) {
ll_loading.setVisibility(View.INVISIBLE);
lv.setAdapter(new TrafficAdapter());
};
};
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.trafficinfo_layout);
lv = (ListView) findViewById(R.id.lv_traffic);
provider = new TrafficInfoProvider(this);
ll_loading = findViewById(R.id.ll_loading);
ll_loading.setVisibility(View.VISIBLE);
//获取到具有Internet权限的应用所产生的流量
new Thread(){
public void run() {
trafficInfos = provider.getTrafficInfos();
//想主线程中发送一个空消息，用于通知主线程更新数据
handler.sendEmptyMessage(0);
};
}.start();
}
//数据适配器
private class TrafficAdapter extends BaseAdapter {
public int getCount() {
return trafficInfos.size();
}
public Object getItem(int position) {
return trafficInfos.get(position);
}
public long getItemId(int position) {
return position;
}
//ListView中显示多少个Item，该方法就被调用多少次
public View getView(int position, View convertView, ViewGroup parent) {
View view;
ViewHolder holder = new ViewHolder();
TrafficInfo info = trafficInfos.get(position);
//复用缓存的View
if(convertView==null){
view = View.inflate(getApplicationContext(), R.layout.traffic_item, null);
holder.iv_icon = (ImageView) view.findViewById(R.id.iv_traffic_icon);
holder.tv_name = (TextView) view.findViewById(R.id.tv_traffic_name);
holder.tv_rx = (TextView) view.findViewById(R.id.tv_traffic_rx);
holder.tv_tx = (TextView) view.findViewById(R.id.tv_traffic_tx);
holder.tv_total = (TextView) view.findViewById(R.id.tv_traffic_total);
view.setTag(holder);
}else{
view = convertView;
holder = (ViewHolder) view.getTag();
}
holder.iv_icon.setImageDrawable(info.getIcon());
holder.tv_name.setText(info.getAppname());
//下载所产生的流量
long rx = info.getRx();
//上传所产生的流量
long tx = info.getTx();
//增强程序的健壮性。因为在模拟器上运行时返回值为-1.
if(rx<0){
rx = 0;
}
if(tx<0){
tx = 0;
}
holder.tv_rx.setText(Formatter.formatFileSize(getApplicationContext(), rx));
holder.tv_tx.setText(Formatter.formatFileSize(getApplicationContext(), tx));
//总流量
long total = rx + tx;
//通过Formatter将long类型的数据转换为MB或这KB，当数字较小时，自动采用KB
holder.tv_total.setText(Formatter.formatFileSize(getApplicationContext(), total));
return view;
}
}
//通过static的修饰，保证了栈内存中存在唯一一份字节码且被共用
static class ViewHolder{
ImageView iv_icon;
TextView tv_name;
TextView tv_tx;
TextView tv_rx;
TextView tv_total;
}
}运行效果图： 