Android项目实战_手机安全卫士流量统计

## 1.抽屉控件
SlidingDrawer：一定要配置android:handle（把手）和android:content（内容），并在子View中添加把手和内容的布局
```java
<SlidingDrawer
android:layout_width="match_parent"
android:layout_height="match_parent"
android:content="@+id/content"
android:handle="@+id/handle"
android:orientation="horizontal" >

<ImageView
android:id="@id/handle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/detail" />

<LinearLayout
android:id="@id/content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#22000000"
android:gravity="center"
android:orientation="vertical" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="我是抽屉里面的内容" />
</LinearLayout>
</SlidingDrawer>
```
## 2.获取总流量
```java
TrafficStats.getMobileRxBytes(); //总的移动网络下载流量
TrafficStats.getMobileTxBytes();//总的移动网络上传流量
TrafficStats.getTotalRxBytes();//总的下载流量
TrafficStats.getTotalTxBytes();//总的网络流量
```
## 3.获取单个应用的流量
```java
PackageManager pm = context.getPackageManager();
List<PackageInfo> packInfos = pm.getInstalledPackages(0);

packageInfo.applicationInfo.uid

TrafficStats.getUidRxBytes(int uid);//某个应用的下载流量
TrafficStats.getUidTxBytes(int uid);//某个应用的上传流量
```
## 4.流量信息保存位置
上传：/proc/uid_stat/[uid]/tcp_snd |udp_snd
下载：/proc/uid_stat/[uid]/tcp_rcv |udp_rcv

## 5.获取文件的数字摘要
```java
/**
* 根据文件路径得到文件的md5算法生成的数字摘要
* @param path
* @return
*/
private String getFileMd5(String path){
try {
File file = new File(path);
//得到一个数字摘要器
MessageDigest digest = MessageDigest.getInstance("MD5");
FileInputStream fis = new FileInputStream(file);
byte[] buffer = new byte[1024];
int len = 0;
while((len = fis.read(buffer))!=-1){
digest.update(buffer,0,len);
}
byte[] result = digest.digest();
StringBuilder sb = new StringBuilder();
for(byte b:result){
int number = b&0xff;
String str = Integer.toHexString(number);
if(str.length()==1){
sb.append("0");
}
sb.append(str);
}
return sb.toString();
} catch (Exception e) {
e.printStackTrace();
return "";
}
}

 package com.hb.mobilesafe.activities;

 import com.hb.demo_mobilesafe.R;

 import android.app.Activity;
 import android.net.TrafficStats;
 import android.os.Bundle;
 import android.text.format.Formatter;
 import android.view.Window;
 import android.widget.TextView;

 public class FlowStatisticAcitivty extends Activity {
     private TextView tv_wifimobile;
     private TextView tv_mobilestastic;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         requestWindowFeature(Window.FEATURE_NO_TITLE);
         setContentView(R.layout.activity_flowstastic);
         tv_mobilestastic=(TextView) findViewById(R.id.tv_mobilestastic);
         tv_wifimobile=(TextView) findViewById(R.id.tv_wifimobile);
         long totalRxBytes = TrafficStats.getTotalRxBytes();//下行
         long totalTxBytes = TrafficStats.getTotalTxBytes();//上行

         long mobileRxBytes = TrafficStats.getMobileRxBytes();
         long mobileTxBytes = TrafficStats.getMobileTxBytes();

         tv_wifimobile.setText(Formatter.formatFileSize(this, totalRxBytes + totalTxBytes));
         tv_mobilestastic.setText(Formatter.formatFileSize(this, mobileRxBytes + mobileTxBytes));

     }

 }