public final void setText(CharSequence text)

public hook(){
    //保存原方法
    Class clazz = Class.forName("android.widget.TextView");
    Method method = clazz.getDeclaredMethod("setText", CharSequence.class)
    replaceMethod(getClassLoader(), MainActivity.class.getName(), "orig", method);//orig是本地写的一个方法，用来保存被替换的原方法
    
    //替换成新方法
    method = MainActivity.class.getDeclaredMethod("newSetText", CharSequence.class);//newSetText是自己写的方法
    replaceMethod(getClassLoader(), clazz.getName(), "setText", method);
}

private void replaceMethod(ClassLoader classLoader, String clz, String meth, Method method) {    
      try {        
            Class<?> clazz = classLoader.loadClass(clz);        
            if(clazz != null) {            
                              clazz = AndFix.initTargetClass(clazz);            
                              Method src = clazz.getDeclaredMethod(meth, method.getParameterTypes());            
                              AndFix.addReplaceMethod(src, method);        
            }    
          } catch (Exception e) { Log.e(TAG, "replaceMethod", e);  }
}

com.example.git.andfixtest E/AndroidRuntime: FATAL EXCEPTION: main
                        Process: com.example.git.andfixtest, PID: 19530
                        java.lang.ClassCastException: android.support.v7.widget.AppCompatButton cannot be cast to android.view.View
                                                      at android.animation.StateListAnimator.getTarget(StateListAnimator.java:104)
                                                      at android.animation.StateListAnimator.start(StateListAnimator.java:186)
                                                      at android.animation.StateListAnimator.setState(StateListAnimator.java:181)
                                                      at android.view.View.drawableStateChanged(View.java:19159)