android-activity

问题 I have an activity that creates an intent, puts some extras with putExtra() and calls the startService(intent) to start a service. This service calculates some stuff based on the extras and then I want to send the result back to the activity. In which way can I do this? I tried to create an intent on my service and broadcast it using sendBroadcast(). I have a broadcastReceiver on the activity but Im not sure if I register it correctly. Im confused! Is there any other way to do so? Something

问题 This code is not reading the value from the spinner it's reading only the first value always, btnResult.setOnClickListener(new View.OnClickListener() { final String USN = spnConversions.getSelectedItem().toString(); @Override public void onClick(View v) { Intent i = new Intent(getApplicationContext(), DatabaseResult.class); i.putExtra("getData",USN.toString()); startActivity(i); } }); 回答1: Why you are using onClickListener for Spinner ? You should use OnItemSelectedListener() for Spinner see

问题 An app has 2 activities, A and B. A has instance data that is saved @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putInt("foo", 0); } and A has int bar; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // ... if (savedInstanceState != null) { bar = savedInstanceState.getInt("foo"); } else { bar = -1; } } to restore the data. Activity B has the actionbar enabled and @Override public void onCreate

问题 Please have a look at the following code. I am ONLY posting the important sections of the code. activity_game.xml <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/fullView" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal

问题 I want to create simple swipe gestures between two activity ,i have searched a lot got something like below.But my doubt is how could i swipe the activity or view using swipe gesture!! class MyGestureDetector extends SimpleOnGestureListener { @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { try { if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH) return false; // right to left swipe if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE &&

问题 I am trying to write a simple cordova-plugin for android, but I am stuck into a crash that I don't know how to resolve. I basically followed these steps to create simple plugin and it worked fine. http://www.mat-d.com/site/tutorial-creating-a-cordova-phonegap-plugin-for-android-app/ Yet, my plugin must call an activity that is packaged as an .aar file. Basically I have a full blown application with java/layouts that needs to be triggered by the plugin. I followed these steps to add my .aar

问题 What is the below animation supposed to do? <?xml version="1.0" encoding="utf-8"?> <rotate xmlns:android="http://schemas.android.com/apk/res/android" android:fromDegrees="0" android:toDegrees="360" android:pivotX="50%" android:pivotY="50%" android:interpolator="@android:anim/linear_interpolator" android:duration="1000" /> Easy enough. It should represent a clockwise rotation about the centre. Just spin around once, then stop. Right? And so it does... when I apply it to a View. But when I

问题 Code: private void setSpans(Editable s, @ColorInt int backgroundColor) { BackgroundColorSpan[] spans = s.getSpans(0, s.length(), BackgroundColorSpan.class); String[] words; if (s.toString().endsWith(" ")) { words = (s.toString() + "X").split("\\s"); } else { words = s.toString().split("\\s"); } int completedWordsCount = words.length - 1; if (spans.length != completedWordsCount) { for (BackgroundColorSpan span : spans) { s.removeSpan(span); } int currentIndex = 0; for (int i = 0; i < words

问题 I'm new to android programming and I don't understand what I'm doing wrong. I try to make a button like this in the xml file: <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/btnText" android:id="@+id/button" android:layout_centerVertical="true" android:layout_centerHorizontal="true" /> This works fine, without the android:text="@string/btnText" part... My strings.xml file looks like this: <string name="btnText">GO!</string> I get this

问题 This question already has answers here : Best practice: AsyncTask during orientation change (9 answers) Closed 4 years ago . Use case: The user start the app that will load a captcha. The user fill the captcha and try to download some information. Problem: If the user rotate the device while downloading the Activity is destroyed. At the end of the execution the AsyncTask is trying to update the destroyed Activity and the result is a "View not attached to window manager". "Wrong" solution: I