public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    String stConfigFp = null;
    String stPkgName = null;
    EditText pkgEdittext = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        stConfigFp = "pkgname";
        pkgEdittext = findViewById(R.id.packageEdit);

        Button verifyButton = findViewById(R.id.verifyButton);
        verifyButton.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        try {
            stPkgName = pkgEdittext.getText().toString();
            FileOutputStream out = openFileOutput(stConfigFp, MODE_WORLD_READABLE);
            out.write(stPkgName.getBytes());
            out.close();
            Toast.makeText(MainActivity.this, "包名为：" + stPkgName + "", Toast.LENGTH_LONG).show();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

public class MainHook implements IXposedHookLoadPackage {


    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    @Override
    public void handleLoadPackage(final XC_LoadPackage.LoadPackageParam loadPackageParam) throws Throwable {

        String stCfgFp = "/data/data/cn.yongye.xposedunsheller/files/pkgname";
        String stUnpackPkgNa = FileUtils.getContent(stCfgFp).trim();
        if(loadPackageParam.packageName.contentEquals(stUnpackPkgNa)){

            Class clsDexClassLoader = loadPackageParam.classLoader.loadClass("dalvik.system.DexClassLoader");

            XposedHelpers.findAndHookConstructor(clsDexClassLoader, String.class, String.class, String.class, ClassLoader.class, new XC_MethodHook() {
                @Override
                protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
                    super.beforeHookedMethod(param);
                    String stCfgFp = "/data/data/cn.yongye.xposedunsheller/files/pkgname";
                    String stUnpackPkgNa = FileUtils.getContent(stCfgFp).trim();
                    if(loadPackageParam.packageName.contentEquals(stUnpackPkgNa)){
                        XposedBridge.log("找到指定APP，开始脱壳");
                        XposedBridge.log("获取到原DEX文件位置：" + param.args[0]);
                        String stDumpFp = "/data/data/" + loadPackageParam.packageName + "/cache/dump.dex";
                        XposedBridge.log("Dump文件到" + stDumpFp);
                        FileUtils.cpFile((String) param.args[0], stDumpFp);
                    }
                }
                @Override
                protected void afterHookedMethod(MethodHookParam param) throws Throwable {
                    super.afterHookedMethod(param);

                }
            });
        }
    }
}