Use Android Support Library V4 to build a responsive UI interface
Use Android Support Library V4 to build a responsive UI interface
introduction:
The user interface requirements of Android applications are usually diversified. Different screen size and device type require different layouts to adapt to different screen size and direction.In order to facilitate developers to build a Responsive UI, the Android platform provides Android Support Library V4, which contains some useful classes and tools to facilitate developers to manage user interfaces on different devices.
This article will introduce how to use Android Support Library V4 to build a responsive UI interface and provide some Java code examples.
1. Import android support library v4:
To use Android Support Library V4, you need to introduce it to the project first.Please follow the steps below:
1. In the built.gradle file of the project, add the following dependencies:
dependencies {
implementation 'com.android.support:support-v4:28.0.0'
}
2. In Android Studio, click "Sync now" to depend on the synchronous project.
Second, build a responsive UI interface:
The following is some suggestions and methods to build a responsive UI interface with Android Support Library V4:
1. Use Fragment:
Fragment is a reusable UI component in Android applications that can flexibly adjust the layout in different screen size and direction.Using Fragment can modularize the UI function for easy reuse and management.
Use Fragment in Activity, you can dynamically add, remove or replace the Fragment according to the screen size and direction.For example, two different layouts can be created, one is suitable for large screens, one is suitable for small screens, and then to choose which Fragment is used according to the screen size and direction of the device.
The following is an example of using Fragment:
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (findViewById(R.id.fragment_container) != null) {
if (savedInstanceState != null) {
return;
}
MyFragment myFragment = new MyFragment();
getSupportFragmentManager().beginTransaction()
.add(R.id.fragment_container, myFragment).commit();
}
}
}
2. Use telescopic layout:
Android Support Library V4 contains some scalable layouts, such as LinearlayoutCompat and ConstraintLayout.These layouts can automatically adjust the position and size of the element according to the screen size and direction to adapt to different devices.
The following is an example of using LinearlayoutCompat layout:
<android.support.v7.widget.LinearLayoutCompat
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Hello World!" />
<TextView
android:id="@+id/textView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Hello Android!" />
</android.support.v7.widget.LinearLayoutCompat>
3. Summary:
Using Android Support Library V4 can easily build a responsive UI interface to adapt to different devices.This article introduces some suggestions and methods of using Android Support Library V4, and provides some Java code examples.Using Android Support Library V4 can make developers easily handle user interface requirements on different devices and improve applications compatibility and user experience.
Reference information:
1. Android Developers - Support Library
https://developer.android.com/topic/libraries/support-library/index.html
2. Android Developers - Fragments
https://developer.android.com/guide/components/fragments
3. Android Developers - LinearLayoutCompat
https://developer.android.com/reference/android/support/v7/widget/LinearLayoutCompat
