[Android development] The realization of the three settings in the upper right corner of the apk

1. First, create a menu resource file in the res directory, and then create a menu.xml file. The name can be chosen by yourself. Copy the following content to the past

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/menu1"
        android:orderInCategory="101"
        app:showAsAction="never"
        android:title="test1" />
    <item
        android:id="@+id/menu2"
        android:orderInCategory="101"
        app:showAsAction="never"
        android:title="test2" />
</menu>

2. Realize the display of three points in the code

     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         getMenuInflater().inflate(R.menu.menu,menu);
         return true;
     }

3. Implement the click function of three points in the code

	public boolean onOptionsItemSelected(MenuItem item){
        switch (item.getItemId()){
            case R.id.menu1:
                Toast.makeText(getApplicationContext(),"1",Toast.LENGTH_SHORT).show();
                break;
            case R.id.menu2:
                Toast.makeText(getApplicationContext(),"2",Toast.LENGTH_SHORT).show();
                break;
        }
        return super.onOptionsItemSelected(item);
    }

4. Do not let the setting bar cover the title bar, just add it to the themes file under the res\values ​​folder

<item name="overlapAnchor">false</item>