Implementation of the OnClick event for Android development

From the beginning of 2015 to learn Android development, now the OnClick event implementation written down, recorded, for reference.

Implement button click Function, let TextView display a line of text, the simplest onclick event.

Direct Sticker Code:

     Public void Onclick_method (view view) {        String contextstring= "Click on this button to achieve the click function";        TextView TextView=(TextView) Findviewbyid (R.ID.TESTTV);        Textview.settext (contextstring);           }

Layout file:

    <TextViewAndroid:id= "@+id/testtv"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:hint= "@string/hello_world"/>    <ButtonAndroid:onclick= "Onclick_method"Android:id= "@+id/button"Android:layout_below= "@id/testtv"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "click"        />

Take a look at the following implementations:

Before clicking:

After clicking:

See there are other ways, but I feel this is the most simple and clear, later development and use of this can be.

Implementation of the OnClick event for Android development