The android.content.res TypedArray is a class that provides access to an array of homogeneous values typed to a desired format. It is used to retrieve values from the Android resources and can be used to specify attributes in XML resources.
The hasValue() method of the TypedArray class is used to check if a specified attribute is defined in the array. The method returns a boolean value, true if the attribute is defined and false otherwise.
Example 1: TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.MyCustomView); if (array.hasValue(R.styleable.MyCustomView_customAttribute)) { int customVal = array.getColor(R.styleable.MyCustomView_customAttribute, Color.RED); }
In this example, we create a TypedArray object by calling the obtainStyledAttributes() method of the context object. We then check if the "customAttribute" is defined in the array by calling the hasValue() method. If it is defined, we can retrieve its value using the getColor() method.
Example 2: TypedArray array = getResources().obtainTypedArray(R.array.my_array); if (array.hasValue(0)) { int val = array.getInt(0, 0); }
In this example, we retrieve an array of integers from the resources by calling the obtainTypedArray() method of the getResources() object. We then check whether the first element of the array is defined by calling the hasValue() method. If it is defined, we can retrieve its value using the getInt() method.
The android.content.res.TypedArray class is included in the android.content.res package.
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