Question

我正在学习按照https://looksok.wordpress.com/2012/12/15/android-complete-widget-tutorial-including-source-code/

的教程创建Android小部件

教程展示了如何使用一个按钮和图像构建android小部件。按下按钮将更改显示的图像。

public class MyWidgetIntentReceiver extends BroadcastReceiver {

private static int clickCount = 0;

@Override
public void onReceive(Context context, Intent intent) {
    if(intent.getAction().equals("pl.looksok.intent.action.CHANGE_PICTURE")){
        updateWidgetPictureAndButtonListener(context);
    }
}

private void updateWidgetPictureAndButtonListener(Context context) {
    RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_demo);
    remoteViews.setImageViewResource(R.id.widget_image, getImageToSet());

    //REMEMBER TO ALWAYS REFRESH YOUR BUTTON CLICK LISTENERS!!!
    remoteViews.setOnClickPendingIntent(R.id.widget_button, MyWidgetProvider.buildButtonPendingIntent(context));

    MyWidgetProvider.pushWidgetUpdate(context.getApplicationContext(), remoteViews);
}

private int getImageToSet() {
    clickCount++;
    return clickCount % 2 == 0 ? R.drawable.me : R.drawable.wordpress_icon;
}

}

我想要做的是将clickCount扩展到多个（12张图片）。作者评论说：将drawable放在ArrayList中，单击按钮后获取与clickCount对应的drawable 如果达到ArrayList的大小，请记住重置计数器以避免IndexOutOfBounds异常

但我真的不知道如何做到这一点，因为我刚开始掌握Java和Android开发知识。

Answer 1

这就是我的成就：

public class MyWidgetIntentReceiver extends BroadcastReceiver {

private static int clickCount = 0;

@Override
public void onReceive(Context context, Intent intent) {
    if(intent.getAction().equals("com.example.intent.action.CHANGE_PICTURE")){
        updateWidgetPictureAndButtonListener(context);
    }
}

private void updateWidgetPictureAndButtonListener(Context context) {
    RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_demo);
    remoteViews.setImageViewResource(R.id.widget_image, getImageToSet());

    //REMEMBER TO ALWAYS REFRESH YOUR BUTTON CLICK LISTENERS!!!
    remoteViews.setOnClickPendingIntent(R.id.widget_button, MyWidgetProvider.buildButtonPendingIntent(context));

    MyWidgetProvider.pushWidgetUpdate(context.getApplicationContext(), remoteViews);
}

private int getImageToSet() {

    clickCount++;
    if (clickCount == 1) {
        return R.drawable.image1 ;
    }
    if (clickCount == 2) {
        return R.drawable.image2 ;
    }
    if (clickCount == 3) {
        return R.drawable.image3 ;
    }
    clickCount = 0;
    return R.drawable.image4 ;
}
}

将clickCount扩展为2个以上的项目

1 个答案: