Est-il possible d'afficher une barre de progression de rotation dans un bouton? par exemple. comme arrière-plan dessinable?
Oui.
Vous pouvez créer un AnimationDrawable, comme décrit ici , puis utiliser la balise drawableLeft
(par exemple) dans le XML de votre bouton. ainsi:
<Button
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:background="@drawable/your_background_drawable_resource"
Android:drawableLeft="@drawable/your_animation_drawable_resource"
Android:text="@string/your_text_res">
</Button>
Oui ... Il suffit d'enrouler le bouton et la barre de progression dans une disposition relative, comme ça ...
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:Android="http://schemas.Android.com/apk/res/Android"
Android:orientation="vertical" Android:layout_width="match_parent"
Android:layout_height="match_parent"
Android:weightSum="1">
<RelativeLayout
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:layout_gravity="center_horizontal">
<ProgressBar
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:id="@+id/progressBar"
Android:layout_gravity="right"
Android:layout_alignTop="@+id/btnConnect"
Android:layout_alignRight="@+id/btnConnect"
Android:layout_alignEnd="@+id/btnConnect" />
<Button
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:text="Connect"
Android:id="@+id/btnConnect"
Android:layout_gravity="center_horizontal"
Android:layout_marginTop="30dp"
Android:width="200dp"
Android:focusable="false"
Android:focusableInTouchMode="false" />
</RelativeLayout>
<TextView
Android:id="@+id/txtConnectStatus"
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:layout_below="@+id/btnConnect"
Android:layout_alignParentBottom="true"
Android:layout_centerHorizontal="true"
Android:text="Status : Not connected"
Android:textSize="12dp"
Android:layout_gravity="center_horizontal" />
<LinearLayout
Android:orientation="vertical"
Je voulais publier l'exemple d'image, mais je n'ai pas encore assez de réputation ...;)
J'avais le même problème, j'ai donc créé un bouton spécialisé pour cela: LoadingProgressButton
Incluez le bouton comme ceci:
<br.com.simplepass.loading_button_lib.CircularProgressButton
Android:id="@+id/btn_id"
Android:layout_width="match_parent"
Android:layout_height="wrap_content"
Android:background="@drawable/circular_border_shape"
app:spinning_bar_width="4dp" <!-- Optional -->
app:spinning_bar_color="#FFF" <!-- Optional -->
app:spinning_bar_padding="6dp" <!-- Optional -->
Et utilisez-le comme ceci:
CircularProgressButton btn = (CircularProgressButton) findViewById(R.id.btn_id)
btn.startAnimation();
[do some async task. When it finishes]
//You can choose the color and the image after the loading is finished
btn.doneLoagingAnimation(fillColor, bitmap);
[or just revert de animation]
btn.revertAnimation();
J'ai fait un exemple de code comme ci-dessous .. J'espère que mes codes vous aideront :)
[main.xml]
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:Android="http://schemas.Android.com/apk/res/Android"
Android:orientation="vertical"
Android:layout_width="fill_parent"
Android:layout_height="fill_parent"
Android:gravity="center"
>
<Button
Android:id="@+id/wheel_button"
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:background="@drawable/icon_spin_animation"
/>
</LinearLayout>
[icon_spin_animation.xml]
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:Android="http://schemas.Android.com/apk/res/Android"
Android:id="@+id/selected" Android:oneshot="false">
<item Android:drawable="@drawable/wheel_db_update01" Android:duration="50"/>
<item Android:drawable="@drawable/wheel_db_update02" Android:duration="50"/>
<item Android:drawable="@drawable/wheel_db_update03" Android:duration="50"/>
<item Android:drawable="@drawable/wheel_db_update04" Android:duration="50"/>
<item Android:drawable="@drawable/wheel_db_update05" Android:duration="50"/>
<item Android:drawable="@drawable/wheel_db_update06" Android:duration="50"/>
</animation-list>
[Code d'activité]
public class ProgressOnTheButtonActivity extends Activity implements OnClickListener {
/** Called when the activity is first created. */
AnimationDrawable mFrameAnimation = null;
boolean mbUpdating = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btnWheel = (Button)findViewById(R.id.wheel_button);
btnWheel.setOnClickListener(this);
mFrameAnimation = (AnimationDrawable) btnWheel.getBackground();
}
public void onClick(View v) {
if(v.getId() == R.id.wheel_button) {
if(!mbUpdating) {
mbUpdating = true;
new AsyncTaskForUpdateDB().execute("");
}
}
}
private class AsyncTaskForUpdateDB extends AsyncTask<String, Integer, ResultOfAsyncTask> {
@Override
protected void onPreExecute() {
mFrameAnimation.start();
super.onPreExecute();
}
@Override
protected ResultOfAsyncTask doInBackground(String... strData) {
ResultOfAsyncTask result = new ResultOfAsyncTask();
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return result;
}
@Override
protected void onPostExecute(ResultOfAsyncTask result) {
mFrameAnimation.stop();
mbUpdating = false;
}
@Override
protected void onCancelled() {
mFrameAnimation.stop();
mbUpdating = false;
super.onCancelled();
}
@Override
protected void onProgressUpdate(Integer... progress) {
}
}
private class ResultOfAsyncTask {
int iErrorCode = 0;
}
}
Pour faire fonctionner Animatable
drawables, vous devez étendre la classe Button
et appeler Animatable.start()
pour les drawables. J'ai fait une implémentation pour cela:
package com.example.yourapplication;
import Android.content.Context;
import Android.graphics.drawable.Animatable;
import Android.graphics.drawable.Drawable;
import Android.support.v7.widget.AppCompatButton;
import Android.util.AttributeSet;
public class AnimateCompoundDrawableButton extends AppCompatButton {
public AnimateCompoundDrawableButton(Context context) {
super(context);
}
public AnimateCompoundDrawableButton(Context context, AttributeSet attrs) {
super(context, attrs);
}
public AnimateCompoundDrawableButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
public void setCompoundDrawables(Drawable left, Drawable top, Drawable right, Drawable bottom) {
super.setCompoundDrawables(left, top, right, bottom);
startIfAnimatable(left);
startIfAnimatable(top);
startIfAnimatable(right);
startIfAnimatable(bottom);
}
@Override
public void setCompoundDrawablesRelative(Drawable start, Drawable top, Drawable end, Drawable bottom) {
super.setCompoundDrawablesRelative(start, top, end, bottom);
startIfAnimatable(start);
startIfAnimatable(top);
startIfAnimatable(end);
startIfAnimatable(bottom);
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
// Makes a copy of the array, however we cannot do this otherwise.
for (Drawable drawable : getCompoundDrawables()) {
startIfAnimatable(drawable);
}
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
// Makes a copy, however we cannot do this otherwise.
for (Drawable drawable : getCompoundDrawables()) {
stopIfAnimatable(drawable);
}
}
private void startIfAnimatable(Drawable drawable) {
if (drawable instanceof Animatable) {
((Animatable) drawable).start();
}
}
private void stopIfAnimatable(Drawable drawable) {
if (drawable instanceof Animatable) {
((Animatable) drawable).stop();
}
}
}
Une autre option consiste à utiliser le nifty Spezi-Views , il contient un ProgressButton qui est assez facile à utiliser:
<de.halfreal.spezi.views.ProgressButton
Android:id="@+id/button1"
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:text="Press me"
app:selectedText="I am loaded"
app:unselectedText="Press me again"
app:loadingDrawable="@drawable/spinner"
/>
et en code:
...
//show a rotation spinner, and no text (or the loading text)
progressButton.enableLoadingState();
//show no animation, but the selected/ unselected text
progressButton.disableLoadingState();
...