我试图创建一个简单的android小部件,显示时间,但使用自定义字体。有人知道怎么做吗?
我试过这个:
Problem showing time using custom font
但这不起作用。第一个getassets()无法工作,因为它需要上下文,如果几秒钟后删除设置自定义字体的行,我将得到失败的绑定器事务错误。
有人能帮我或给我一个教程的链接吗?
用定时器更新时间也是个好习惯吗?
我的密码
JavaGET.java
public class LWidget extends AppWidgetProvider {
//=============================================================================================
//On Update
//=============================================================================================
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {
Timer timer = new Timer();
timer.scheduleAtFixedRate(new MyTime(context, appWidgetManager), 1, 1000);
//views.setImageViewBitmap(R.id.TimeView, buildUpdate(time));
}
//=============================================================================================
//Timer class
//=============================================================================================
private class MyTime extends TimerTask {
RemoteViews remoteViews;
AppWidgetManager appWidgetManager;
ComponentName thisWidget;
DateFormat timeformat = new SimpleDateFormat("kk:mm");
public MyTime(Context context, AppWidgetManager appWidgetManager) {
this.appWidgetManager = appWidgetManager;
remoteViews = new RemoteViews(context.getPackageName(), R.layout.main);
thisWidget = new ComponentName(context, LWidget.class);
}
@Override
public void run() {
Calendar ci = Calendar.getInstance();
String time = timeformat.format(ci.getTime());
remoteViews.setTextViewText(R.id.widget_textview,"Time = " + time);
remoteViews.setImageViewBitmap(R.id.widget_imageview, buildUpdate(time));
appWidgetManager.updateAppWidget(thisWidget, remoteViews);
}
}
//=============================================================================================
//bitmap font
//=============================================================================================
public Bitmap buildUpdate(String time)
{
Bitmap myBitmap = Bitmap.createBitmap(160, 84, Bitmap.Config.ARGB_4444);
Canvas myCanvas = new Canvas(myBitmap);
Paint paint = new Paint();
//if I remove the comment here, getAssets() will not work
//Typeface clock = Typeface.createFromAsset(this.getAssets(),"fonts/Crysta.ttf");
paint.setAntiAlias(true);
paint.setSubpixelText(true);
// paint.setTypeface(clock);
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.WHITE);
paint.setTextSize(65);
paint.setTextAlign(Align.CENTER);
myCanvas.drawText(time, 80, 60, paint);
return myBitmap;
}
//=============================================================================================
//On receive
//=============================================================================================
@Override
public void onReceive(Context context, Intent intent) {
// v1.5 fix that doesn't call onDelete Action
final String action = intent.getAction();
if (AppWidgetManager.ACTION_APPWIDGET_DELETED.equals(action)) {
final int appWidgetId = intent.getExtras().getInt(
AppWidgetManager.EXTRA_APPWIDGET_ID,
AppWidgetManager.INVALID_APPWIDGET_ID);
if (appWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID) {
this.onDeleted(context, new int[] { appWidgetId });
}
} else {
super.onReceive(context, intent);
}
}
}
MIN
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:orientation="vertical"
android:layout_gravity="center"
android:layout_height="wrap_content">
<TextView android:id="@+id/widget_textview"
android:text="@string/widget_text"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_gravity="center_horizontal|center"
android:layout_marginTop="5dip"
android:padding="10dip"
android:textColor="@android:color/black"/>
<ImageView
android:id="@+id/widget_imageview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
ltime_widget_provider.xml文件
<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
android:minWidth="146dip"
android:minHeight="72dip"
android:updatePeriodMillis="10000"
android:initialLayout="@layout/main"
/>
最佳答案
您必须使用AlarmManager
而不是计时器。
您不能使用计时器:AppWidgetProvider
是BroadcastReceiver
的扩展,您的
进程不能保证在回调方法之后继续运行
返回。
使用代码because作为参考。
getAssets()无法工作,因为它需要上下文onUpdate()
提供了一个Context
,不是吗?