relativelayout | 易学教程

[android]how to get 4 buttons at the bottom and each 2 button is beside each other

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问题 I find majority teaching online is about 2 button beside each other but I couldnt obtain the arrangement wanted as in the image. When I put in the relativelayout, all the button overlap together no matter I put android:layout_above:"XX" All my total, 0.00, back and pay button , i need to out them at the bottom. this is my original code: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android

简单实现顶部和底部工具栏

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我们今天讲的主要就是android屏幕上的顶部与底部的工具栏，这样我们就可以在一个界面上实现很多种功能了，这样我们的用户用起来也比较好用，至于上面都有什么功能，那就看大家怎么来实现了这两个工具栏全是用布局来实现的。底部工具栏布局代码： <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:background="@drawable/bottom" android:layout_width="fill_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/edit" android:text="测试" android:gravity="center_horizontal" android:drawableTop="@drawable/ic_dialog_alert" android:layout_alignParentLeft="true" android:layout_width="80dip" android:layout_height="wrap_content"> </TextView>

Dynamically add layouts (Relative Layouts) beneath each other in Android

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问题 I am trying to create a method where each time I click a button, I want the screen to display a Relative Layout box below one that is currently there or create one at the top if there isn't one there and I want it to keep creating them below from each button click. Currently using this method, nothing happens when the button is clicked. Here is the code that I have so far and can someone please help me see what I am doing wrong and what I can do to fix this issue: public void createNewLayout(

Dynamically add layouts (Relative Layouts) beneath each other in Android

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Vertically centering two TextViews in a RelativeLayout

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问题 What's Happening I am writing a PopupWindow containing two TextViews, where the second TextView should be centered vertically in the popup, and the first TextView should be directly above it. The problem is that the RelativeLayout seems to be treating the two TextViews as a single element, and vertically centering the middle of them. I want the lower TextView to be the one centered, though, and the upper one to be resting just above it (hence the android:layout_above="@id/first_name" ). XML

android.widget.RadioButton cannot be cast to android.widget.Spinner

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问题 I am using relative layout for one of my activity, but it stops, whenever i launch this activity. The error is "android.widget.RadioButton cannot be cast to android.widget.Spinner". The xml file is as follows: <EditText android:id="@+id/edit_age" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_alignLeft="@id/edit_first_name" android:layout_below="@+id/edit_first_name" android:ems="10" android:hint="@string/age" android:inputType="number" > <requestFocus /> <

How to get ViewGroup after inflate layout in Android?

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问题 I have layout with my custom view like this : <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:focusable="true" android:focusableInTouchMode="true" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="@+id/imageView1" android:layout_marginLeft="30dp" android:layout

Drag and Drop for imageview not working

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问题 My RelativeLayout has an image. I am just trying to make it draggable in the entire layout.The issue is that every time I drag and drop, it goes back to the original position. Here is my drag_layout.xml <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:id="@+id/mainView" android:background="@drawable/bg_animation" tools:context="com.example

Differences between: myView.getLayoutParams().height = screenHeight and myView.setLayoutParams(lp)?

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问题 When it comes to change the height of a layout dynamically, I usually set the desired dimensions using LayoutParams like: RelativeLayout myView = (RelativeLayout) v.findViewById(R.id.myView); RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams( RelativeLayout.LayoutParams.FILL_PARENT, screenHeight); myView.setLayoutParams(lp); But there is this shorter version as well: myView.getLayoutParams().height = screenHeight; Both are working in my case, I would prefer the second version

Differences between: myView.getLayoutParams().height = screenHeight and myView.setLayoutParams(lp)?

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