imagebutton

问题 I am trying to create a button with image and no text from the [Design] view on Visual Studio 2010. I drag & dropped the button, then I click the Image Property, I select a png image from my resource file, but the property always remain empty and the button doesn't have image neither on the [Design] view or in the compiled program. I tried setting the image on the Form.Designer.cs file with: // // button1 // this.button1.Location = new System.Drawing.Point(73, 11); this.button1.Name =

问题 I have been trying to switch the state of my buttons from on to off and vice versa, by adding an image for on and adding an image for off state. I tried through xml, however I was just able to temporarily switch it upon click (by using press/focus etc). Here is the code for the same: fragment_justin: <RelativeLayout android:id="@+id/top_bar_container" android:layout_width="match_parent" android:layout_height="48.5dp" android:layout_alignParentTop="true" android:background="@color/background

问题 I want to create an event to change what my image button looks like, but only when it is being pushed down. So far I have been using an onTouch listener, but that just changes it permanently. I can't find anything like an onKyeUpListener() type of thing for the button. Does anything like this exist? SOLVED final ImageButton button = (ImageButton) findViewById(R.id.ImageButton01); button.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event)

问题 I have a widget on my home screen with several ImageButtons which have default background images. Through the configuration activity, I can change the image on any of the ImageButtons. The problem is that when the screen is rotated, the image on the ImageButton disapears and it changes back to the default image. I don't know why this happens or how to fix it 回答1: When the screen is rotated the entire appwidget is rebuilt using the last RemoteViews object you passed to AppWidgetManager

问题 i have a recyclerview in my MainActivity and i'm showing no of items in list manner through RecyclerView.Adapter . here is my recyclerview_list_items.xml file, <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="10dp"> <ImageView android:id="@+id/person_photo" android:layout_width="50dp" android:layout_height=

问题 I have a listview to which I add rows with 1 imagebutton .. I tried to set the imagebutton the setfocusable false but still not working .. item_list.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="160dp" android:descendantFocusability="blocksDescendants" android:id="@+id/RL_item"> <ImageButton android:layout_width="200dp" android:layout_height="fill_parent" android

问题 I have a listview to which I add rows with 1 imagebutton .. I tried to set the imagebutton the setfocusable false but still not working .. item_list.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="160dp" android:descendantFocusability="blocksDescendants" android:id="@+id/RL_item"> <ImageButton android:layout_width="200dp" android:layout_height="fill_parent" android

问题 Is there a way I can find what resource a particular ImageButton is set to, at any given time? For eg: I have an ImageButton that I set to R.drawable.btn_on onCreate. Later, at some point, the ImageButton gets set to R.drawable.btn_off . I want to be able to check what resource the ImageButton is set to in my code. Thanks Chris 回答1: Just use setTag() and getTag() to associate and retrieve custom data for your ImageView . 回答2: You could define your own class as a child of ImageButton , add a

问题 I created a state-list selector file item_bg_selector.xml in the drawable folder like this : <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_selected="true" android:drawable="@drawable/item_background_selected" /> <item android:state_focused="true" android:drawable="@drawable/item_background_selected" /> <item android:state_pressed="true" android:drawable="@drawable/item_background_selected" /> <item android:drawable="@android:color/transparent"/> <

问题 I'm new to android development I developing a new app with imagebutton to facebook profile/page I tried this code but this code open the facebook in the browser public class AboutActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_about); ImageButton f = (ImageButton)findViewById(R.id.f_logo); f.setOnClickListener(new OnClickListener() { public void onClick(View arg0) { Intent