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I have a view with radios, inputs and a button and when I click it, I want to check that all inputs contain information. How can I iterate through the view's elements in the activity and check if every textview meets the aforementioned requirement ? Thanks.
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Run a loop and access them one by one by indexing (Eg. el [i] for i th element). Example: This example implements the above approach. + "iterate over all DOM elements.";
Using v-for with Range The built-in v-for directive allows us to loop through items. We can use a range in the v-for directive to iterate a specified number of times. Let’s replace the contents of our <div> with an unordered list that repeats list items 15 times:
We can use a range in the v-for directive to iterate a specified number of times. Let’s replace the contents of our <div> with an unordered list that repeats list items 15 times: This will result in an unordered list with numbers 1 to 15.
We can loop over the items in a shoppingItems array from the data model. This can be accomplished by adding the v-for directive in the element that should be repeated. Let’s modify the lines in data () so it returns a shoppingItems array with objects:
I've done something similar in some code I don't have with me at the moment, but from memory it should be something like this (assuming a parent view LinearLayout with an id of "layout"):
LinearLayout layout = (LinearLayout)findViewById(R.id.layout); boolean success = formIsValid(layout); public boolean formIsValid(LinearLayout layout) { for (int i = 0; i < layout.getChildCount(); i++) { View v = layout.getChildAt(i); if (v instanceof EditText) { //validate your EditText here } else if (v instanceof RadioButton) { //validate RadioButton } //etc. If it fails anywhere, just return false. } return true; } To apply the method by kcoppock recursively, you can change it to this:
private void loopViews(ViewGroup view) { for (int i = 0; i < view.getChildCount(); i++) { View v = view.getChildAt(i); if (v instanceof EditText) { // Do something } else if (v instanceof ViewGroup) { this.loopViews((ViewGroup) v); } } } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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