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2014/10/16 ¤W¤È 08:19:51
android Programming Glossary: mycustomviewfindViewById() returns null for custom component in layout XML, not for other components http://stackoverflow.com/questions/1691569/findviewbyid-returns-null-for-custom-component-in-layout-xml-not-for-other-co main.xml including these elements and others some.package.MyCustomView android id @ id foo some other params TextView android id @.. boring findViewById R.id.boring ...find other elements... MyCustomView foo MyCustomView findViewById R.id.foo if foo null Log.d TAG.. R.id.boring ...find other elements... MyCustomView foo MyCustomView findViewById R.id.foo if foo null Log.d TAG epic fail The other..
Declaring a custom android UI element using XML http://stackoverflow.com/questions/2695646/declaring-a-custom-android-ui-element-using-xml 1.0 encoding utf 8 resources declare styleable name MyCustomView attr name android text attr name android textColor attr name.. a getContext .obtainStyledAttributes attrs R.styleable.MyCustomView Use a Log.i test a.getString R.styleable.MyCustomView_android_text.. Use a Log.i test a.getString R.styleable.MyCustomView_android_text Log.i test a.getColor R.styleable.MyCustomView_android_textColor..
Android Custom View Constructor http://stackoverflow.com/questions/2884501/android-custom-view-constructor parameters mean. Is there a description of these public MyCustomView super public MyCustomView Context context super context public.. a description of these public MyCustomView super public MyCustomView Context context super context public MyCustomView Context context.. public MyCustomView Context context super context public MyCustomView Context context AttributeSet attrs super context attrs public..
http://stackoverflow.com/questions/3441396/defining-custom-attrs of a custom view declare styleable declare styleable name MyCustomView attr name my_custom_attribute attr name android gravity declare.. android layout_height fill_parent org.example.mypackage.MyCustomView android layout_width fill_parent android layout_height wrap_content.. in the constructor of your custom view as follows. public MyCustomView Context context AttributeSet attrs int defStyle super context..
Concise way of writing new DialogPreference classes? http://stackoverflow.com/questions/4505845/concise-way-of-writing-new-dialogpreference-classes you need to use the getEditor method like so private MyCustomView myView @Override protected void onBindDialogView View view super.onBindDialogView.. view was created by my custom onCreateDialogView myView MyCustomView view SharedPreferences sharedPreferences getSharedPreferences..
http://stackoverflow.com/questions/5216658/pinch-zoom-for-custom-view mScaleDetector private float mScaleFactor 1.f public MyCustomView Context mContext ... Your view code ... mScaleDetector new ScaleGestureDetector..
Android library project uses declare-styleable — how to compile? http://stackoverflow.com/questions/6471742/android-library-project-uses-declare-styleable-how-to-compile 1.0 encoding utf 8 resources declare styleable name MyCustomView attr name android text attr name android textColor attr name..
findViewById() returns null for custom component in layout XML, not for other components http://stackoverflow.com/questions/1691569/findviewbyid-returns-null-for-custom-component-in-layout-xml-not-for-other-co in layout XML not for other components I have a res layout main.xml including these elements and others some.package.MyCustomView android id @ id foo some other params TextView android id @ id boring some other params In my Activity's onCreate I do this.. onCreate I do this setContentView R.layout.main TextView boring findViewById R.id.boring ...find other elements... MyCustomView foo MyCustomView findViewById R.id.foo if foo null Log.d TAG epic fail The other elements are found successfully but foo.. this setContentView R.layout.main TextView boring findViewById R.id.boring ...find other elements... MyCustomView foo MyCustomView findViewById R.id.foo if foo null Log.d TAG epic fail The other elements are found successfully but foo comes back null...
Declaring a custom android UI element using XML http://stackoverflow.com/questions/2695646/declaring-a-custom-android-ui-element-using-xml as follows 1. Declare attributes in values attrs.xml xml version 1.0 encoding utf 8 resources declare styleable name MyCustomView attr name android text attr name android textColor attr name extraInformation format string declare styleable resources.. to call. private void init AttributeSet attrs TypedArray a getContext .obtainStyledAttributes attrs R.styleable.MyCustomView Use a Log.i test a.getString R.styleable.MyCustomView_android_text Log.i test a.getColor R.styleable.MyCustomView_android_textColor.. a getContext .obtainStyledAttributes attrs R.styleable.MyCustomView Use a Log.i test a.getString R.styleable.MyCustomView_android_text Log.i test a.getColor R.styleable.MyCustomView_android_textColor Color.BLACK Log.i test a.getString R.styleable.MyCustomView_extraInformation..
Android Custom View Constructor http://stackoverflow.com/questions/2884501/android-custom-view-constructor choices do or don't do why I should implement them or what the parameters mean. Is there a description of these public MyCustomView super public MyCustomView Context context super context public MyCustomView Context context AttributeSet attrs super context.. I should implement them or what the parameters mean. Is there a description of these public MyCustomView super public MyCustomView Context context super context public MyCustomView Context context AttributeSet attrs super context attrs public MyCustomView.. Is there a description of these public MyCustomView super public MyCustomView Context context super context public MyCustomView Context context AttributeSet attrs super context attrs public MyCustomView Context context AttributeSet attrs Map params..
http://stackoverflow.com/questions/3441396/defining-custom-attrs then you can do that in the name as follows. An example of a custom view declare styleable declare styleable name MyCustomView attr name my_custom_attribute attr name android gravity declare styleable When defining your custom attributes in XML on.. android orientation vertical android layout_width fill_parent android layout_height fill_parent org.example.mypackage.MyCustomView android layout_width fill_parent android layout_height wrap_content android gravity center whatever my_custom_attribute.. Finally to access that custom attribute you normally do so in the constructor of your custom view as follows. public MyCustomView Context context AttributeSet attrs int defStyle super context attrs defStyle TypedArray a context.obtainStyledAttributes..
Concise way of writing new DialogPreference classes? http://stackoverflow.com/questions/4505845/concise-way-of-writing-new-dialogpreference-classes the changed preference value in onDialogClosed . Otherwise you need to use the getEditor method like so private MyCustomView myView @Override protected void onBindDialogView View view super.onBindDialogView view the view was created by my custom.. onBindDialogView View view super.onBindDialogView view the view was created by my custom onCreateDialogView myView MyCustomView view SharedPreferences sharedPreferences getSharedPreferences myView.setValue1 sharedPreferences.getString myKey1 myDefaultValue1..
http://stackoverflow.com/questions/5216658/pinch-zoom-for-custom-view only a few lines of code you'll need private ScaleGestureDetector mScaleDetector private float mScaleFactor 1.f public MyCustomView Context mContext ... Your view code ... mScaleDetector new ScaleGestureDetector context new ScaleListener @Override public..
Android library project uses declare-styleable — how to compile? http://stackoverflow.com/questions/6471742/android-library-project-uses-declare-styleable-how-to-compile of attributes that could be found in values attrs.xml xml version 1.0 encoding utf 8 resources declare styleable name MyCustomView attr name android text attr name android textColor attr name extraInformation format string declare styleable resources..
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