Button click event

Button click event generally has four methods:

 

1: Anonymous inner class

2: Custom inner class

3: Implement the click event interface through the current Activity

4: Bind in the xml file

Anonymous inner class format:

<Button
    android:id="@+id/bt1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="custom click event"></Button>

Add id processing to the button attribute in the xml file

Anonymous inner class format:

Button bt1=findViewById(R.id.bt1);
bt1.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {

    }
});

Custom inner class format:

/ custom inner class
        Button bt1=findViewById(R.id.bt1);
        MyClickListener mc=new MyClickListener();
        bt1.setOnClickListener(mc);


    }

    class MyClickListener implements View.OnClickListener {
        @Override
        public void onClick(View view) {

        }
    }

 The current Activity implements the click event interface:

 Make the current activity implement this interface

    Button bt1=findViewById(R.id.bt1);
    bt1.setOnClickListener(this);


}

@Override
public void onClick(View view) {

}

Just override this method 

Bind in xml file:

android:onClick="Myclick"

Call the onclick attribute, the latter value is the method to be bound, you need to rewrite it yourself

 public void Myclick(View v) {
        switch (v.getId()) {
            case R.id.bt1:
                break;
            case R.id.bt2:
                break;
        }
    }

 Control multiple buttons at the same time by matching switch and id

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