我有TextView的编程方式添加到的LinearLayout和一些外部事件，我想，以减少该TextView的底缘至-10，为我尝试以下。

  LinearLayout.LayoutParams lastTxtParams =新LinearLayout.LayoutParams（LinearLayout.LayoutParams.WRAP_CONTENT，LinearLayout.LayoutParams.WRAP_CONTENT）;
lastTxtParams.setMargins（0，0，0，-10）;
mOldTextView.setLayoutParams（lastTxtParams）;
mOldTextView.invalidate（）;
 

时的修改已添加到视图部件的保证金的正确方法？ 一些它是如何不工作。

  TextView的forgot_pswrd =（TextView中）findViewById（R.id.ForgotPasswordText）;
    forgot_pswrd.setOnTouchListener（本）;
    LinearLayout.LayoutParams LLP =新LinearLayout.LayoutParams（LayoutParams.WRAP_CONTENT，LayoutParams.WRAP_CONTENT）;
    llp.setMargins（50，0，0，0）; // llp.setMargins（左，上，右，下）;
    forgot_pswrd.setLayoutParams（LLP）;
 

我这样做，它完美地工作。 也许因为你给的值-ve，这就是为什么你的code不工作。 你只要把你在哪里创建视图的引用这个code。

I have TextView added Programmatically in to LinearLayout and on some external events I want to decrease bottom margin of that TextView to -10, for that I tried following.

LinearLayout.LayoutParams lastTxtParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
lastTxtParams.setMargins(0, 0, 0, -10);
mOldTextView.setLayoutParams(lastTxtParams);
mOldTextView.invalidate();

Is the right way of modifying Margin of widget that has been added to View? Some how it is not working.

    TextView forgot_pswrd = (TextView) findViewById(R.id.ForgotPasswordText);
    forgot_pswrd.setOnTouchListener(this);     
    LinearLayout.LayoutParams llp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    llp.setMargins(50, 0, 0, 0); // llp.setMargins(left, top, right, bottom);
    forgot_pswrd.setLayoutParams(llp);

I did this and it worked perfectly. Maybe as you are giving the value in -ve, that's why your code is not working. You just put this code where you are creating the reference of the view.