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Started by Debarghya DasSep 14, 2021

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Android Studio: How to create a counter by Button click in a widget?

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How can i save the value in the Counter? If i start my Code, then the button is working, but it will reset to zero, so if i click the "+" Button, so it is always by 1. And when i click the "-" Button, then the count is by "-1". It does not go upper or lower. And every 24h i want a reset to zero. Can someone help me?

Code:

import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.widget.RemoteViews;

import java.lang.reflect.Type;

public class Water extends AppWidgetProvider {

private static final String MyOnClickPlus = "Plus";
private static final String MyOnClickMinus = "Minus";
int sum = 0;

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.water);
views.setOnClickPendingIntent(R.id.btnplus, getPendingSelfIntent(context, MyOnClickPlus));
views.setOnClickPendingIntent(R.id.btnminus, getPendingSelfIntent(context, MyOnClickMinus));


appWidgetManager.updateAppWidget(appWidgetIds, views);
super.onUpdate(context, appWidgetManager, appWidgetIds);
}

@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.water);

if(intent.getAction().toString() == MyOnClickPlus){
sum += 1;
views.setTextViewText(R.id.mengeheute, Integer.toString(sum));
}
else if(intent.getAction().toString() == MyOnClickMinus) {
sum -= 1;
views.setTextViewText(R.id.mengeheute, Integer.toString(sum));
}
updateWidget(context, views);
super.onReceive(context, intent);
}

protected static PendingIntent getPendingSelfIntent(Context context, String action) {
Intent intent = new Intent(context, Water.class);
intent.setAction(action);
return PendingIntent.getBroadcast(context, 0, intent, 0);
}

void updateWidget(Context context, RemoteViews remoteViews){
ComponentName widgetComponent = new ComponentName(context, Water.class);
AppWidgetManager.getInstance(context).updateAppWidget(widgetComponent, remoteViews);
}

AndroidManifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.water">

<application
android:allowBackup="true"
android:icon="@drawable/drinkwater"
android:label="@string/app_name"
android:roundIcon="@drawable/drinkwater"
android:supportsRtl="true"
android:theme="@style/Theme.Water">

<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver
android:name=".Water"
android:exported="true">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />

</intent-filter>

<meta-data
android:name="android.appwidget.provider"
android:resource="@xml/water_info" />
</receiver>
</application>

</manifest>

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