Android基于特征码查杀手机病毒

package com.example.thefinalproject;

import java.util.List;

import com.example.thefinalproject.R;

import MD5.MD5Encoder;
import android.app.Activity;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.Signature;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.MotionEvent;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.ScrollView;
import android.widget.TextView;

public class AntiVirus extends Activity {
protected static final int STOP = 100;
private ImageView iv;
private ProgressBar pb;
private LinearLayout ll;
private AnimationDrawable anim;
private ScrollView sv;
private SQLiteDatabase db;
private boolean flagscanning = false;
private Handler handler = new Handler() {

@Override
public void handleMessage(Message msg) {

super.handleMessage(msg);
 if(msg.what==STOP){
     ll.removeAllViews();
 anim.stop();
 
 }
String str = (String) msg.obj;
 TextView tv = new TextView(getApplicationContext());
 tv.setText(str);
 ll.setOrientation(LinearLayout.VERTICAL);
 ll.addView(tv);
 sv.scrollBy(0, 20);

System.out.println(str);
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.antivirus_screen);
db = SQLiteDatabase.openDatabase("/sdcard/antivirus.db", null,
SQLiteDatabase.OPEN_READONLY);
iv = (ImageView) this.findViewById(R.id.iv);
pb = (ProgressBar) this.findViewById(R.id.progressBar1);
ll = (LinearLayout) this.findViewById(R.id.ll);
iv.setBackgroundResource(R.drawable.anti_anim);
sv = (ScrollView) this.findViewById(R.id.sv);
anim = (AnimationDrawable) iv.getBackground();
}

@Override
public boolean onTouchEvent(MotionEvent event) {
if(flagscanning)
return false;

if (event.getAction() == MotionEvent.ACTION_UP) {
flagscanning= true;
anim.start();
new Thread() {
public void run() {
List<PackageInfo> infos = getPackageManager()
.getInstalledPackages(
PackageManager.GET_UNINSTALLED_PACKAGES
| PackageManager.GET_SIGNATURES);
// 获取每一个应用程序的签名 获取到这个签名后 需要在数据库里面查询
pb.setMax(infos.size());
int total = 0;
int virustotal = 0;
for (PackageInfo info : infos) {
total++;
try {
sleep(20);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Message msg = Message.obtain();
msg.obj = "正在扫描" + info.packageName;
handler.sendMessage(msg);
Signature[] signs = info.signatures;
String str = signs[0].toCharsString();
String md5 = MD5Encoder.encode(str);

if("6c20c50051ad1dedce0528e0f3dfbc96".equals(md5)){
System.err.println("----------");
}
Cursor cursor = db.rawQuery(
"select desc from datable where md5=?",
new String[] { md5 });
if (cursor.moveToFirst()) {
String desc = cursor.getString(0);
msg = Message.obtain();
msg.obj = info.packageName + ": " + desc;

handler.sendMessage(msg);
virustotal++;
}
cursor.close();
pb.setProgress(total);

}
Message msg = Message.obtain();
msg.what = STOP;
msg.obj = "扫描完毕 ,共发现" + virustotal + "个病毒";
handler.sendMessage(msg);
flagscanning = false;
pb.setProgress(0);
};
}.start();
}
return super.onTouchEvent(event);
}

@Override
protected void onDestroy() {
if (db.isOpen())
db.close();
super.onDestroy();
}
}
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