# 话不多说，直接上代码
## MainActivity.class
~~~
package com.gyk.xposedmodule;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import de.robv.android.xposed.XposedBridge;
public class MainActivity extends AppCompatActivity {
private EditText editText1;
private EditText editText2;
private EditText editText3;
private String kapai1 = "J";
private String kapai2 = "Q";
private String kapai3 = "K";
private Button button;
public static Context context = null;
private static String[] kapais = {"A","2","3","4","5","6","7","8","9","10","J","Q","K"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = getApplicationContext();
editText1 = (EditText) findViewById(R.id.editText1);
editText2 = (EditText)findViewById(R.id.editText2);
editText3 = (EditText)findViewById(R.id.editText3);
editText1.setText(kapai1);
editText2.setText(kapai2);
editText3.setText(kapai3);
button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
kapai1 = editText1.getText().toString();
kapai2 = editText2.getText().toString();
kapai3 = editText3.getText().toString();
kapai1 = kapai1.trim().toUpperCase();
kapai2 = kapai2.trim().toUpperCase();
kapai3 = kapai3.trim().toUpperCase();
editText1.setText(kapai1);
editText2.setText(kapai2);
editText3.setText(kapai3);
List<String> list = new ArrayList<>(Arrays.asList(kapais));
int i1 = list.indexOf(kapai1) + 10;
int i2 = list.indexOf(kapai2) + 10;
int i3 = list.indexOf(kapai3) + 10;
String strNums = i1 + "," + i2 + "," + i3;
String path ="";
// 获取到当前环境的存储路径
path = context.getFilesDir().getAbsolutePath();
boolean flag = saveFile(path,strNums);
String toastMsg = "";
if(flag) {
toastMsg = "卡牌已经保存，地址为" + path;
} else {
toastMsg = "卡牌保存失败！";
}
Toast t = Toast.makeText(getApplicationContext(),toastMsg , Toast.LENGTH_LONG);
t.show();
}
});
}
// 保存文件
public static boolean saveFile(String path,String strNums){
FileOutputStream outputStream;
try{
outputStream = new FileOutputStream(new File(path + "/puke.txt"));
outputStream.write(strNums.getBytes());
outputStream.flush();
outputStream.close();
return true;
}catch (Exception e) {
e.printStackTrace();
}
return false;
}
}
~~~
## HookClass.class
~~~
package com.gyk.xposedmodule;
import android.app.Application;
import android.content.Context;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.List;
import de.robv.android.xposed.IXposedHookLoadPackage;
import de.robv.android.xposed.XC_MethodHook;
import de.robv.android.xposed.XposedBridge;
import de.robv.android.xposed.XposedHelpers;
import de.robv.android.xposed.callbacks.XC_LoadPackage;
public class HookClass implements IXposedHookLoadPackage {
@Override
public void handleLoadPackage(XC_LoadPackage.LoadPackageParam lpparam) throws Throwable {
XposedBridge.log("========hook到包：" + lpparam.packageName + "============");
String weNeedPackage = "com.ify.dd";
if (lpparam.packageName.equals(weNeedPackage)) {
XposedBridge.log("=====hook到了我们要的包:" + lpparam.packageName);
// hook我们需要的类，由于是多dex，所以需要特殊处理
XposedHelpers.findAndHookMethod(Application.class, "attach", Context.class, new XC_MethodHook() {
@Override
protected void afterHookedMethod(MethodHookParam param) throws Throwable {
final Context context = (Context) param.args[0];
ClassLoader cl = (context.getClassLoader());
Class<?> hookclass = null;
Class<?> argClass = null;
try {
hookclass = cl.loadClass("com.tongdaxing.xchat_core.room.face.FaceCoreImpl");
argClass = cl.loadClass("com.tongdaxing.xchat_core.room.face.FaceInfo");
} catch (Exception e) {
XposedBridge.log("jyy寻找xxx.xxx.xxx报错");
return;
}
XposedBridge.log("寻找xxx.xxx.xxx成功");
XposedHelpers.findAndHookMethod(hookclass,
"generateRandomNumber",
int.class,
argClass,
new XC_MethodHook(){
//进行hook操作
@Override
protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
XposedBridge.log("=====hook方法前=====");
if(param != null && param.args.length > 0){
XposedBridge.log("查看参数");
for (int i = 0; i < param.args.length; i++) {
XposedBridge.log("arg：" + param.args[i]);
}
XposedBridge.log("========拦截前完毕=====");
}
}
@Override
protected void afterHookedMethod(MethodHookParam param) throws Throwable {
super.afterHookedMethod(param);
XposedBridge.log("=====hook方法后=====");
Object obj = param.getResultOrThrowable();
String text = readData();
String[] strPukes = text.split(",");
Integer[] pukeIds = new Integer[3];
for (int i = 0; i < strPukes.length; i++) {
pukeIds[i] = Integer.parseInt(strPukes[i]);
}
List<Integer> list = Arrays.asList(pukeIds);
XposedBridge.log("========"+ pukeIds[2] +"==========");
param.setResult(list);
}
});
}
});
}
}
// 读取文件信息
public static String readData() {
// 由于无法获取到MainActivity的content，所以路径手写
String path = "/data/user/0/io.va.exposed/virtual/data/user/0/com.gyk.xposedmodule/files/puke.txt";
File file = new File(path);
try {
FileInputStream fis = new FileInputStream(file);
BufferedReader br = new BufferedReader(new InputStreamReader(fis));
StringBuilder sb = new StringBuilder("");
String line = null;
while((line = br.readLine()) != null) {
sb.append(line);
}
return sb.toString();
} catch (Exception e) {
e.printStackTrace();
}
return "真sb";
}
}
~~~
