我有一个带有2个活动的小应用程序(比如A和B)和appWidget。当我点击小部件时,我开始一个活动,在做一些事情的同时为小部件设置动画。我是这样做的;
Intent intent = new Intent(context, DialogActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.main);
RemoteViews.setOnClickPendingIntent(R.id.imageButton1, pendingIntent);
然后onCreate
中的活动执行此操作:
Paint p = new Paint();
p.setStyle(Paint.Style.FILL);
p.setColor(Color.TRANSPARENT);
logger.debug("inizializzo movie"); //$NON-NLS-1$
Movie movie;
InputStream is = null;
long moviestart = 0;
is = this.getResources().openRawResource(R.drawable.gifanimata);
movie = Movie.decodeStream(is);
taskIsrunning = true;
//this is an AsyncTask that at the end of the work sets taskIsrunning = false
new InitTask().execute(this);
while (taskIsrunning) {
Bitmap bitmap = Bitmap.createBitmap(100, 100, Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawRect(0, 0, 100, 100, p);
long now = android.os.SystemClock.uptimeMillis();
if (moviestart == 0) { // first time
moviestart = now;
}
int relTime = (int) ((now - moviestart) % movie.duration());
movie.setTime(relTime);
movie.draw(canvas, 0, 0);
updateViews.setImageViewBitmap(R.id.imageButton1, bitmap);
widgetManager.updateAppWidget(theWidget, updateViews);
try {
Thread.sleep(500);
} catch (Exception e) {
throw e;
}
}
最后,从这个活动(女巫完全透明)我展示了一个对话框。 这就像我想要的那样,但问题出在这里:
当我启动活动时,如果之前我打开了应用程序的第一个活动(活动A)并使用主页按钮关闭它(活动保持在堆栈中),而不是用后退按钮关闭它,从窗口小部件启动的活动显示对话框,显示对话框,但活动A也是如此。
我尝试设置清单android:noHistory =“true”并且问题已解决,但如果从活动A i启动活动B,后退按钮将不会显示活动A.