Android 常用java代码

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
        WindowManager.LayoutParams.FLAG_FULLSCREEN);//设置全屏显示

        Button button = findViewById(R.id.b1); // id of button
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //执行代码
            }
        });