如何使一个小部件Android的切换按钮 [英] How to make a toggle button for a widget android

问题描述

所以，我创建了一个小部件，而我尽我所能来模拟一个切换按钮。感觉小部件不支持改变依赖于它的国家的形象我使用的ImageButton和规划的切换按钮。

So I've created a widget, and I'm tried my best to simulate a toggle button. Sense Widget doesn't support a toggle button I'm using a imagebutton and plan on changing the image depending on it's state.

唯一的问题是它的状态不会被保存，我不知道为什么。

Only problem is it's state isn't being saved and I'm not sure why.

package com.tdubstudios.beastmode;

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 android.widget.Toast;

public class WidgetClass extends AppWidgetProvider{

private static final String ACTION_WIDGET_RECEIVER = "ActionRecieverWidget";  
private RemoteViews views;  

public boolean beastmodeOn = false;

public void onUpdate(Context context, AppWidgetManager appWidgetManager,  
       int[] appWidgetIds) {  
   final int N = appWidgetIds.length;
   views = new RemoteViews("com.tdubstudios.beastmode", R.layout.widget_layout);

   // Perform this loop procedure for each App Widget that belongs to this  
   // provider  
   for (int i = 0; i < N; i++) {  
       int appWidgetId = appWidgetIds[i];  
       Intent intent = new Intent(context, WidgetClass.class);  
       intent.setAction(ACTION_WIDGET_RECEIVER);  
       PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);  

       views.setOnClickPendingIntent(R.id.widget_ib, pendingIntent);  

       // Tell the AppWidgetManager to perform an update on the current App  
      // Widget  
       appWidgetManager.updateAppWidget(appWidgetId, views);  
   }
}  

@Override  
public void onReceive(Context context, Intent intent) {  
     if (intent.getAction().equals(ACTION_WIDGET_RECEIVER)) { 
         if(beastmodeOn){
             beastmodeOn = false;
             Toast.makeText(context, "beastmode is now off", Toast.LENGTH_SHORT).show();
         }else{
             beastmodeOn = true;
             Toast.makeText(context, "beastmode is now ON", Toast.LENGTH_SHORT).show();
         }
     }  
     super.onReceive(context, intent);  
}  

@Override
public void onDeleted(Context context, int[] appWidgetIds) {
    super.onDeleted(context, appWidgetIds);
    Toast.makeText(context, "onDelete has been called in widgetClass", Toast.LENGTH_LONG).show();
}

}

不管我多少次preSS的按钮，我总是得到敬酒beastmode是现在

No matter how many times I press the button I always get the toast "beastmode is now ON"

有什么建议？

感谢您。

编辑：

好了，所以我说这code：

Ok so I added this code:

Log.i("widget","BEFORE beastmode is: "+beastmodeOn);
             beastmodeOn = true;
             Toast.makeText(context, "beastmode is now ON", Toast.LENGTH_SHORT).show();
             Log.i("widget","AFTER beastmode is: "+beastmodeOn);

和我的日志给我这个回：

and my log gives me this back:

 BEFORE beastmode is: false
 AFTER beastmode is: true

这给了我这个我每次preSS的按钮。所以，很显然它会创建一个新的实例，或者诸如此类的话。一旦执行就必须销毁所有变量值什么的，也许有人有更多的知识知道正确的话。

It gives me this EVERY time I press the button. So obviously it creates a new instance or something to that effect. Once it executes it must destroy all variable values or something, maybe someone with more knowledge knows the right words.

因此​​，没有人知道周围的工作呢？

So does anyone know a work around then?

推荐答案

所以我不知道到底为什么上面没有工作，我假设，因为它会创建一个新的实例。我设法通过使用共享preferences跟踪切换，使周围虽然工作。也许不是最好的方式做到这一点，但它的作品，所以我很高兴。

So I don't exactly know why the above didn't work, I'm assuming because it creates a new instance. I've managed to make a work around though by using SharedPreferences to keep track of the toggle. Probably not the best way to do it but it works, so I'm happy.

有关其他人在这里有这个问题亚去：

For anyone else having this problem here ya go:

package com.tdubstudios.beastmode;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.preference.PreferenceManager;
import android.widget.RemoteViews;
import android.widget.Toast;

public class WidgetClass extends AppWidgetProvider {

    private static final String ACTION_WIDGET_RECEIVER = "ActionRecieverWidget";
    private RemoteViews views;

    public boolean beastmodeOn;

    public void onUpdate(Context context, AppWidgetManager appWidgetManager,
            int[] appWidgetIds) {
        final int N = appWidgetIds.length;
        views = new RemoteViews("com.tdubstudios.beastmode",
                R.layout.widget_layout);

        // Perform this loop procedure for each App Widget that belongs to this
        // provider
        for (int i = 0; i < N; i++) {
            int appWidgetId = appWidgetIds[i];
            Intent intent = new Intent(context, WidgetClass.class);
            intent.setAction(ACTION_WIDGET_RECEIVER);
            PendingIntent pendingIntent = PendingIntent.getBroadcast(context,
                    0, intent, 0);

            views.setOnClickPendingIntent(R.id.widget_ib, pendingIntent);

            SharedPreferences prefs = PreferenceManager
                    .getDefaultSharedPreferences(context);
            boolean value = prefs.getBoolean("beastmodeOn", false);

            if (value) {
                Editor editor = prefs.edit();
                editor.putBoolean("beastmodeOn", false);
                editor.commit();
            }

            appWidgetManager.updateAppWidget(appWidgetId, views);
        }
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(ACTION_WIDGET_RECEIVER)) {

            SharedPreferences prefs = PreferenceManager
                    .getDefaultSharedPreferences(context);
            boolean value = prefs.getBoolean("beastmodeOn", false);
            Editor editor = prefs.edit();

            if (value) {
                beastmodeOn = true;
            } else {
                beastmodeOn = false;
            }

            if (beastmodeOn) {
                Toast.makeText(context, "beastmode is now off",
                        Toast.LENGTH_SHORT).show();

                editor.putBoolean("beastmodeOn", false);
                editor.commit();
            } else {
                Toast.makeText(context, "beastmode is now ON",
                        Toast.LENGTH_SHORT).show();

                editor.putBoolean("beastmodeOn", true);
                editor.commit();
            }
        }
        super.onReceive(context, intent);
    }

    @Override
    public void onDeleted(Context context, int[] appWidgetIds) {
        SharedPreferences prefs = PreferenceManager
                .getDefaultSharedPreferences(context);
        boolean value = prefs.getBoolean("beastmodeOn", false);

        if (value) {
            Editor editor = prefs.edit();
            editor.putBoolean("beastmodeOn", false);
            editor.commit();
        }

        super.onDeleted(context, appWidgetIds);
    }
}

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