LoadingButton in Android

LoadingButton in Android

A LoadingButton typically indicates a process is occurring after a user action, and the UI gives feedback about this process. While there isn't a default LoadingButton component in the Android SDK, it's fairly easy to create one. Here's a guide on how you can create a basic LoadingButton using a Button and a ProgressBar.

1. Define the LoadingButton Layout:

In the layout XML, you can combine a Button and a ProgressBar within a FrameLayout:

<FrameLayout android:id="@+id/loadingButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:clickable="true" android:focusable="true"> <Button android:id="@+id/button" android:layout_width="match_parent" android:layout_height="match_parent" android:text="Submit" /> <ProgressBar android:id="@+id/progressBar" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:visibility="gone" /> </FrameLayout>

2. Handle Loading State in Your Activity or Fragment:

In your Kotlin code, you can toggle between the loading state and the default state:

val loadingButton = findViewById<FrameLayout>(R.id.loadingButton) val button = findViewById<Button>(R.id.button) val progressBar = findViewById<ProgressBar>(R.id.progressBar) loadingButton.setOnClickListener { // Perform your asynchronous task here (e.g., network request) showLoading(true) // For demonstration, simulate a delay and then revert to the default state Handler(Looper.getMainLooper()).postDelayed({ showLoading(false) }, 3000) } fun showLoading(isLoading: Boolean) { if (isLoading) { button.visibility = View.INVISIBLE progressBar.visibility = View.VISIBLE loadingButton.isClickable = false } else { button.visibility = View.VISIBLE progressBar.visibility = View.GONE loadingButton.isClickable = true } }

This setup makes the Button invisible and shows the ProgressBar while loading. Once the loading completes, the Button becomes visible again, and the ProgressBar disappears.

You can further enhance this by adding animations, custom backgrounds, or other UI enhancements to match your app's theme and user experience requirements. There are also third-party libraries available that offer more advanced loading buttons with extended features, so depending on your needs, you might want to explore those as well.

Examples

  1. Implementing loading state in Android button:

    • To implement a loading state in an Android button, you can use a combination of ProgressBar and Button. Toggle their visibility based on the loading state.
    <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <Button android:id="@+id/loadingButton" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Click Me" /> <ProgressBar android:id="@+id/loadingProgressBar" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_centerHorizontal="true" android:visibility="invisible" /> </RelativeLayout> 
    Button loadingButton = findViewById(R.id.loadingButton); ProgressBar loadingProgressBar = findViewById(R.id.loadingProgressBar); // Set OnClickListener to handle button click and show loading state loadingButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // Show loading state loadingButton.setEnabled(false); loadingProgressBar.setVisibility(View.VISIBLE); // Perform asynchronous task // Hide loading state loadingButton.setEnabled(true); loadingProgressBar.setVisibility(View.INVISIBLE); } });

  2. Creating a progress button in Android with example code:

    • Create a custom button that extends AppCompatButton and includes a ProgressBar. Toggle their visibility to represent the loading state.
    public class ProgressButton extends AppCompatButton { private ProgressBar progressBar; public ProgressButton(Context context, AttributeSet attrs) { super(context, attrs); init(); } private void init() { progressBar = new ProgressBar(getContext(), null, android.R.attr.progressBarStyleSmall); // Set ProgressBar attributes and add it to the layout // ... // Set OnClickListener to handle button click and show loading state setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // Show loading state setEnabled(false); progressBar.setVisibility(View.VISIBLE); // Perform asynchronous task // Hide loading state setEnabled(true); progressBar.setVisibility(View.INVISIBLE); } }); } }

  3. Custom LoadingButton implementation in Android:

    • Create a custom LoadingButton class that encapsulates the loading state logic. This can extend AppCompatButton and handle loading state internally.
    public class LoadingButton extends AppCompatButton { private ProgressBar progressBar; public LoadingButton(Context context, AttributeSet attrs) { super(context, attrs); init(); } private void init() { progressBar = new ProgressBar(getContext(), null, android.R.attr.progressBarStyleSmall); // Set ProgressBar attributes and add it to the layout // ... // Set OnClickListener to handle button click and show loading state setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { showLoadingState(); // Perform asynchronous task hideLoadingState(); } }); } private void showLoadingState() { setEnabled(false); progressBar.setVisibility(View.VISIBLE); } private void hideLoadingState() { setEnabled(true); progressBar.setVisibility(View.INVISIBLE); } }

  4. Loading animation for buttons in Android app development:

    • Use animations to create loading effects for buttons. For example, you can rotate a ProgressBar or use custom animations.
    <rotate xmlns:android="http://schemas.android.com/apk/res/android" android:fromDegrees="0" android:toDegrees="360" android:pivotX="50%" android:pivotY="50%" android:duration="1000" android:interpolator="@android:anim/linear_interpolator" />

  5. Android LoadingButton library and usage:

    • Utilize existing libraries, such as the Ladda library, for implementing loading buttons in Android. Add the library dependency and follow its documentation for usage.

    Ladda Library GitHub Repository

  6. Handling button state changes in Android with loading:

    • Implement a state machine or use boolean flags to track the loading state of a button. Update the UI accordingly when the loading state changes.
    boolean isLoading = false; // Set OnClickListener to handle button click and show/hide loading state loadingButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (!isLoading) { // Show loading state isLoading = true; loadingButton.setEnabled(false); loadingProgressBar.setVisibility(View.VISIBLE); // Perform asynchronous task // Hide loading state isLoading = false; loadingButton.setEnabled(true); loadingProgressBar.setVisibility(View.INVISIBLE); } } });

  7. LoadingButton XML layout examples in Android:

    • Create XML layouts that include loading buttons with progress indicators, as shown in the previous examples.
    <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <LoadingButton android:id="@+id/loadingButton" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Click Me" /> <ProgressBar android:id="@+id/loadingProgressBar" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_centerHorizontal="true" android:visibility="invisible" /> </RelativeLayout>

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