xposed框架下通过Toast显示任意Application包名

最近玩了玩xposed框架，首先简单的写了一个能够在打开任意应用时通过Toast输出它的包名的小module，稍微的记录一下，其他也没有什么代码，主要就是hook了Instumentation的callApplicationOnCreate方法。主要代码如下

package com.example.classbrick.qqbrick;import android.app.Application;import android.content.Context;import android.widget.Toast;import com.example.classbrick.qqbrick.utils.MyLog;import de.robv.android.xposed.IXposedHookLoadPackage;import de.robv.android.xposed.XC_MethodHook;import de.robv.android.xposed.XposedHelpers;import de.robv.android.xposed.callbacks.XC_LoadPackage;/** * Created by classbrick on 2017/5/30. */public class main implements IXposedHookLoadPackage {    private static final String TAG = "QQBrick.main";    @Override    public void handleLoadPackage(XC_LoadPackage.LoadPackageParam loadPackageParam) throws Throwable {        final Class<?> clazz = XposedHelpers.findClass("android.app.Instrumentation", null);        XposedHelpers.findAndHookMethod(clazz, "callApplicationOnCreate", Application.class                , new XC_MethodHook() {            @Override            protected void beforeHookedMethod(MethodHookParam param) throws Throwable {                super.beforeHookedMethod(param);            }            @Override            protected void afterHookedMethod(MethodHookParam param) throws Throwable {                super.afterHookedMethod(param);                Context context = null;                if(param.args[0] instanceof Application){                    context = ((Application) param.args[0]).getApplicationContext();                } else {                    MyLog.i(TAG, "hook callApplicationOnCreate failed");                    return;                }                Toast.makeText(context, context.getPackageName(), Toast.LENGTH_SHORT).show();            }        });    }}