java.lang.ClassCastException : android. widget.RelativeLayout$LayoutParams 无法转换为 android.widget.FrameLayout$LayoutParams

Question

我正在使用此代码在相对布局中移动按钮并调整其大小...

触摸屏幕时程序崩溃，可能是什么原因？

    ViewGroup relativeL;


onCreate(){
relativeL = (ViewGroup) findViewById(R.id.relativeLayout);
    relativeL.setOnTouchListener(new RelativeLayout.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            methodMove();
            return true;
        }
    });
}

public void methodMove(){
    View button = findViewById(R.id.helloButton);

    TransitionManager.beginDelayedTransition(relativeL);

    RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    layoutParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, RelativeLayout.TRUE);
    layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
    relativeL.setLayoutParams(layoutParams);
    button.setLayoutParams(new RelativeLayout.LayoutParams(130,250));
}

我尝试将相对布局设置为RelativeLayout类型而不是ViewGroup，但仍然不起作用。指导，...提前谢谢您..

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="my context"
android:id="@+id/relativeLayout">

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Hello World!"
    android:id="@+id/helloButton"/>

Answer 1

我是移动设备，无法检查代码，但您可以尝试更改

button.setLayoutParams(new RelativeLayout.LayoutParams(130,250));

至

button.setLayoutParams(new FrameLayout.LayoutParams(130,250));