我正在尝试制作一个简单的小部件,该部件可以在小部件中以文本方式和图形方式显示电池百分比。文本部分没有问题,但我很难让图形更新部件。当用作小部件的布局背景时,ClipDrawable不起作用
以图形方式,我有根据电池百分比剪辑的电池图像。我正在尝试使用ClipDrawable
。
battery_widget_layout.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/widgetLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal"
android:padding="@dimen/widget_padding"
android:background="@drawable/battery_clip_layer" >
<TextView
android:id="@+id/batteryPercentageWidgetTextView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="@string/battery_percentage_widget_default"
android:gravity="center" />
</LinearLayout>
battery_clip_layer.xml(即ClipDrawable)
<clip xmlns:android="http://schemas.android.com/apk/res/android"
android:clipOrientation="vertical"
android:gravity="bottom"
android:drawable="@drawable/battery_shape" />
BatteryService.java - 接收电池电压事件,并通过更新微件服务a RemoteViews
public class BatteryService extends Service {
private static final String LOG = BatteryService.class.getName();
private final AtomicInteger batteryPercentage = new AtomicInteger(100);
private final BroadcastReceiver batteryUpdateReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
int level = intent.getIntExtra("level", 0);
batteryPercentage.set(level);
updateWidget();
}
};
@Override
public void onCreate() {
super.onCreate();
registerReceiver(batteryUpdateReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
Log.i(LOG, "Created...");
}
@Override
public void onDestroy() {
super.onDestroy();
unregisterReceiver(batteryUpdateReceiver);
Log.i(LOG, "Destroyed...");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i(LOG, "Started...");
updateWidget();
return super.onStartCommand(intent, flags, startId);
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}
private void updateWidget() {
final int percentage = batteryPercentage.get();
log.i(LOG, "Updated... " + percentage);
RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.battery_widget_layout);
remoteViews.setTextViewText(R.id.batteryPercentageWidgetTextView, percentage + "%");
//ATTEMPT 1 - no cigar
remoteViews.setInt(R.drawable.battery_clip_layer, "setLevel", 5000);
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this);
appWidgetManager.updateAppWidget(new ComponentName(this, BatteryAppWidgetProvider.class), remoteViews);
}
private void updateWidgetAttempt2() {
final int percentage = batteryPercentage.get();
Log.i(LOG, "Updated... " + percentage);
//ATTEMPT 2 - still no cigar
Drawable clipLayer = getApplicationContext().getResources().getDrawable(R.drawable.battery_clip_layer);
if (clipLayer instanceof ClipDrawable) {
ClipDrawable clipDrawable = (ClipDrawable) clipLayer;
int level = clipDrawable.getLevel();
if (clipDrawable.setLevel(10000)) {
clipDrawable.invalidateSelf();
}
Log.i(LOG, "Updated clip amount..." + level + " -> " + ((ClipDrawable) clipLayer).getLevel());
}
RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.battery_widget_layout);
remoteViews.setTextViewText(R.id.batteryPercentageWidgetTextView, percentage + "%");
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this);
appWidgetManager.updateAppWidget(new ComponentName(this, BatteryAppWidgetProvider.class), remoteViews);
}
}
在BatteryService
请看看两个不同的尝试来更新小部件(updateWidget()
和updateWidgetAttempt2()
)。这两种尝试都没有成功。
我觉得我正在做一些根本性的错误。我非常感谢任何帮助/建议! :)
你的两次尝试是不正确的。在第一次尝试中,您错误地使用了'setInt()'方法,因为该方法期望第一个'int'成为窗口小部件布局中的'View'的标识(而不是像您尝试的可绘制引用)对任何视图都使用setLevel()方法,该方法存在于drawable类中。你的第二种方法也是不正确的,因为你所做的只是加载一个drawable,将其设置为level,这就是所有,与widget的LinearLayout没有关系。 – Luksprog 2013-04-13 09:58:28
要使用'ClipDrawble',你需要能够在它已经被设置为背景时获得对它的引用,并且改变它的等级或者设置它的等级,然后将其设置为背景。我怀疑你可以使用目标视图在widget中执行上述任何操作。 – Luksprog 2013-04-13 10:00:03
@Luksprog谢谢,能否请您在回答中发布上述信息,我会奖励您的赏金。 – Muel 2013-04-16 08:11:53