Android 0 Basics 30th: Two minutes master Framelayout frame layout

Original: Android 0 Basics 30th: Two minutes master Framelayout frame layout

Before learning the linear layout, relative layout, and table layout, this issue is to learn the fourth layout of--framelayout frame layout.

I. Understanding Framelayout

Frame layouts are the simplest of the Android layouts, using framelayout tags.

The frame layout creates an empty area (called a frame with each control occupying one frame) for each control that is added to it. When you design an interface with frame layout, you can only display a control in the upper-left corner of the screen, and if you add multiple controls, the controls will appear in the upper-left corner of the screen in order.

The following table shows the XML attributes commonly used in framelayout and the related method descriptions.

Framelayout contains child elements that are also controlled by framelayout.layoutparams, so it contains child elements that can also specify android:layout_gravity properties. This property controls how the child element is aligned in the framelayout.

Ii. examples

Next, learn the usage of framelayout using a simple example program.

Also using the Widgetsample project, continue to use the Activity_main.xml file in the app/main/res/layout/directory, where the following code snippet is populated:

<?XML version= "1.0" encoding= "Utf-8"?><Framelayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent">    <TextViewAndroid:layout_width= "300DP"Android:layout_height= "300DP"android:layout_gravity= "Center"Android:background= "#FF33ffff" />    <TextViewAndroid:layout_width= "240DP"Android:layout_height= "240DP"android:layout_gravity= "Center"Android:background= "#FF33ccff" />    <TextViewAndroid:layout_width= "180DP"Android:layout_height= "180DP"android:layout_gravity= "Center"Android:background= "#FF3399ff" />    <TextViewAndroid:layout_width= "120DP"Android:layout_height= "120DP"android:layout_gravity= "Center"Android:background= "#FF3366ff" />    <TextViewAndroid:layout_width= "60DP"Android:layout_height= "60DP"android:layout_gravity= "Center"Android:background= "#FF3300ff" /></Framelayout>

The above interface layout definition uses the Framelayout layout and adds 5 TextView to the layout container, which reduces the height and width of the 5 TextView-so that the first TextView added will not be completely obscured; Background color gradient for 5 textview.

To run the program, you can see the interface effect shown:

Frame layouts are displayed on a frame-by-frame interface, and can often be used in game development.

Here, Framelayout's example ends, and more usage about framelayout can be practiced in more hands.

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Past period Summary share:

Android 0 Basics Introduction 1th: Android's past life

Android 0 Basics Section 2nd: Android system Architecture and application components those things

Android 0 Basics Section 3rd: Bring you up to talk about Android development environment

Android 0 Basics 4th: Installing and configuring the JDK correctly Ko fu the first trick

Android 0 Basics 5th: Use ADT bundles to easily meet the goddess

Android 0 Basics 6th: Configuration Optimization SDK Manager, official dating goddess

Android 0 Basics 7th: Take care of Android simulator and start the Sweet journey

Android 0 Basics 8th: HelloWorld, the starting point for my first trip

Android 0 Basics 9th: Android app, no code can be developed

Android 0 Basics Section 10th: Development IDE Big upgrade, finally ushered in Android Studio

Android 0 Basics Introductory Section 11th: Simple steps to take you to fly, run Android Studio project

Android 0 Basics 12th: Get familiar with the Android studio interface and start selling

Android 0 Basics 13th: Android Studio Configuration optimization to create a development tool

Android 0 Basics 14th: Using high-speed genymotion, stepping into the rocket era

Android 0 Basics Section 15th: Mastering the Android Studio project structure, sailing

Android 0 Basics Section 16th: Android User Interface Development overview

Android 0 Basics Section 17th: TextView Properties and Methods Daquan

Android 0 Basics Section 18th: EditText properties and how to use them

Android 0 Basics section 19th: Button usage explained

Android 0 Basics Section 20th: checkbox and RadioButton Usage Daquan

Android 0 Basics Section 21st: ToggleButton and switch usage Daquan

Android 0 Basics Section 22nd: ImageView's properties and methods Daquan

Android 0 Basics Section 23rd: ImageButton and Zoombutton use Daquan

Android 0 Basics Section 24th: Customize view simple to use to create your own controls

Android 0 Basics Section 25th: Simple and most commonly used linearlayout linear layouts

Android 0 Basics Section 26th: Two alignments, layout_gravity and gravity differ greatly

Android 0 Basics section 27th: Using padding and margin correctly

Android 0 Basics Section 28th: Easy to master relativelayout relative layout

Android 0 Basics 29th: Use tablelayout table layouts

Android 0 Basics 30th: Two minutes master Framelayout frame layout