Actionbar uses a custom layout and has a blank space that is not filled to solve the problem

When creating an empty activity in android studio, the actionbar is still
used as the default status bar. Using a custom layout in the actionbar can more flexibly meet more scenarios, functions, layouts, and interface requirements.
However, when the actionbar uses a custom layout, there will be a blank The situation that is not covered, as shown in the figure below:

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Solution:

        Toolbar parent =(Toolbar) baseBinding.getRoot().getParent();//我使用了viewbinding
        //Toolbar parent =(Toolbar) customActionBarView.getParent();
        parent.setPadding(0,0,0,0);
        parent.setContentInsetsAbsolute(0,0);   

This code works regardless of whether toolbar is used in your custom layout

Actionbar uses the complete code of custom layout:

        //若继承自AppCompatActivity,使用:
        ActionBar actionBar =getSupportActionBar();
        //若继承自Activity,使用:
        //ActionBar actionBar = getActionBar();
        actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
        actionBar.setDisplayShowHomeEnabled(false);
        actionBar.setDisplayShowCustomEnabled(true);
        actionBar.setCustomView(baseBinding.getRoot());  //我使用了viewbinding 
        //actionBar.setCustomView(R.layout.titlebar_layout);  
        actionBar.setElevation(0);
        actionBar.getCustomView().findViewById(R.id.titlebar_left).setOnClickListener(
        new View.OnClickListener() {
    
    
            @Override
            public void onClick(View view) {
    
    
                onBackPressed();
            }
        });

        Toolbar parent =(Toolbar) baseBinding.getRoot().getParent();
        //Toolbar parent =(Toolbar) customActionBarView.getParent();
        parent.setPadding(0,0,0,0);
        parent.setContentInsetsAbsolute(0,0); 

The final effect is as follows:
insert image description here

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Origin blog.csdn.net/Duker_tec/article/details/122369310