关键代码快速定位-TextUtils

Java.perform(function () {
    console.log("start hooking...");
    function showstack() {
        var log = Java.use("android.util.Log");
        var Throwable = Java.use("java.lang.Throwable");
        console.log(log.getStackTraceString(Throwable.$new()))
    }
      var TextUtils=Java.use("android.text.TextUtils");
      TextUtils.isEmpty.implementation=function (a){
          if(a=="1888888888"){
              showstack();
              console.log(a);
          }
          return this.isEmpty(a);
    }
})

判断变量是否为空