在AppWidget中的位图上没有在画布上绘制文本

Question

我想在位图上添加文本并在App-Widget上的ImageView中设置它，这是我的代码：

RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget);
Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.img);
Canvas canvas = new Canvas(bitmap.copy(Bitmap.Config.ARGB_8888, true));
Paint paint = new Paint();
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.WHITE);
paint.setTextSize(20);
paint.setTextAlign(Paint.Align.CENTER);
paint.setAntiAlias(true);
//int xPos = (canvas.getWidth() / 2);
//int yPos = (int) ((canvas.getHeight() / 2) - ((paint.descent() + paint.ascent()) / 2));
int xPos = (canvas.getWidth() / 2);
int yPos = (canvas.getHeight() / 2);
canvas.drawText("My Text", xPos, yPos, paint);
views.setImageViewBitmap(R.id.widgetImg, bitmap);
appWidgetManager.updateAppWidget(appWidgetId, views);

但是在AppWidget中，它只是简单的图像（R.drawable.img），并且没有文字。 有人知道这个问题吗？

Answer 1

根据this回答刚改变了这句话：

Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.img);
Canvas canvas = new Canvas(bitmap.copy(Bitmap.Config.ARGB_8888, true));

为：

Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.img);
bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);
Canvas canvas = new Canvas(bitmap);