我們如何改變小部件按鈕的圖像？

Question

我「米試圖找到一種方法來改變按鈕我爲了顯示應用程序的當前狀態的圖像。

這是我迄今所做的......

HelloWidgetProvider。 java的

public class HelloWidgetProvider extends AppWidgetProvider { 



@Override 
public void onDeleted(Context context, int[] appWidgetIds) { 
// TODO Auto-generated method stub 
//super.onDeleted(context, appWidgetIds); 
Toast.makeText(context, "onDeleted()", Toast.LENGTH_LONG).show(); 
} 

@Override 
public void onDisabled(Context context) { 
// TODO Auto-generated method stub 
//super.onDisabled(context); 
Toast.makeText(context, "onDisabled()", Toast.LENGTH_LONG).show(); 
} 



@Override 
public void onEnabled(Context context) { 
// TODO Auto-generated method stub 
//super.onEnabled(context); 
Toast.makeText(context, "onEnabled()", Toast.LENGTH_LONG).show(); 
} 

public static String MY_WIDGET_UPDATE = "MY_OWN_WIDGET_UPDATE"; 

@Override 
public void onUpdate(Context context, AppWidgetManager appWidgetManager, 
int[] appWidgetIds) { 
// TODO Auto-generated method stub 


CharSequence strWidgetText = "App Status"; 

RemoteViews updateViews = new RemoteViews(context.getPackageName(), R.layout.hellowidget_layout); 

updateViews.setTextViewText(R.id.widgettext, strWidgetText); 
appWidgetManager.updateAppWidget(appWidgetIds, updateViews); 

super.onUpdate(context, appWidgetManager, appWidgetIds); 
Toast.makeText(context, "onUpdate()", Toast.LENGTH_LONG).show(); 

} 




@Override 
public void onReceive(Context context, Intent intent) { 
    // TODO Auto-generated method stub 
    super.onReceive(context, intent); 

// if(MY_WIDGET_UPDATE.equals(intent.getAction())){ 
    Toast.makeText(context, "onReceiver()", Toast.LENGTH_LONG).show(); 
    //} 
} 

} 
<?xml version="1.0" encoding="utf-8"?> 

hellowidget_layout.xml

<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" 
android:layout_width="wrap_content" 
android:layout_height="fill_parent" 
> 
<Button 
android:id="@+id/widgettext" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:textColor="#000000" 
android:background="@drawable/icon" 
android:text="Test Button" 
/> 
</LinearLayout> 

hellowidgetproviderinfo.xml

<?xml version="1.0" encoding="utf-8"?> 
<appwidget-provider 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:minWidth="146dp" 
    android:minHeight="72dp" 
    android:updatePeriodMillis="1000" 
    android:initialLayout="@layout/hellowidget_layout" 
> 
</appwidget-provider> 

請幫我.... 感謝

Answer 1

我已經實現小部件，我有顯示的ImageButton的切換按鈕來更改圖像和文字

這裏是ToogleImageWidget類

public class ToggleImageWidget extends AppWidgetProvider { 
    private static boolean status = false; 
    private RemoteViews remoteViews; 
    private ComponentName watchWidget; 
    @Override 
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) 
    { 
     remoteViews = new RemoteViews(context.getPackageName(), R.layout.main); 
     watchWidget = new ComponentName(context, ToggleImageWidget.class); 
     //remoteViews.setTextViewText(R.id.tbutton, "Time = " + format.format(new Date())); 
     Intent intentClick = new Intent(context,ToggleImageWidget.class); 
     intentClick.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, ""+appWidgetIds[0]); 

     PendingIntent pendingIntent = PendingIntent.getBroadcast(context, appWidgetIds[0],intentClick, 0); 
     remoteViews.setOnClickPendingIntent(R.id.img_btn, pendingIntent); 
     appWidgetManager.updateAppWidget(watchWidget, remoteViews); 
    } 
    @Override 
    public void onReceive(Context context, Intent intent) { 
     super.onReceive(context, intent); 
     if (intent.getAction()==null) { 
      Bundle extras = intent.getExtras(); 
      if(extras!=null) { 
       //int widgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID); 

       remoteViews = new RemoteViews(context.getPackageName(), R.layout.main); 
       if(status){ 
        remoteViews.setImageViewResource(R.id.img_btn, R.drawable.radio_btn_off_img); 
        remoteViews.setTextViewText(R.id.widget_textview, "Off"); 
        status = false; 
       }else{ 
        remoteViews.setImageViewResource(R.id.img_btn, R.drawable.radio_btn_img); 
        remoteViews.setTextViewText(R.id.widget_textview, "On"); 
        status = true; 
       } 

       watchWidget = new ComponentName(context, ToggleImageWidget.class); 

       (AppWidgetManager.getInstance(context)).updateAppWidget(watchWidget, remoteViews); 
       //Toast.makeText(context, "Clicked "+status, 2000).show(); 
      } 
     } 
     else { 
      super.onReceive(context, intent); 
     } 
    } 
} 

這裏是我的main.xml文件的代碼

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/LinearLayout01" 
    android:layout_height="50dp" 
    android:background="#55ffffff" 
    android:layout_width="100dp" 
    android:orientation="horizontal" android:gravity="center_vertical|center_horizontal"> 
    <ImageButton android:layout_width="32dp" android:layout_height="32dp" 
    android:id="@+id/img_btn" android:background="@drawable/radio_btn_off_img" /> 
    <TextView 
     android:layout_weight="1" 
     android:layout_width="wrap_content" 
     android:layout_height="fill_parent" 
     android:gravity="center_vertical" 
     android:paddingLeft="5dp" 
     android:textColor="@android:color/black" 
     android:text="Off" 
     android:textSize="8pt" 
     android:id="@+id/widget_textview"/> 
</LinearLayout> 

這裏是我的AndroidManifest.xml文件的代碼

<application android:icon="@drawable/icon" android:label="@string/app_name"> 
     <receiver android:name=".ToggleImageWidget" android:label="ToggleImageWidget"> 
      <intent-filter> 
       <action android:name="android.appwidget.action.APPWIDGET_UPDATE" /> 
      </intent-filter> 
      <meta-data 
       android:name="android.appwidget.provider" 
       android:resource="@xml/img_widget_provider" /> 
     </receiver> 

    </application> 

，並在這裏被存儲在RES我img_widget_provider.xml文件的代碼/你有xml目錄如果它不存在，則創建xml目錄到res目錄中。

<?xml version="1.0" encoding="utf-8" ?> 
<appwidget-provider 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:minWidth="146dp" 
    android:initialLayout="@layout/main" 
    android:updatePeriodMillis="1000" 
    android:minHeight="144dp"/>