[Lesson19] View Binding

build.gradle (app):

//Android Studio 4.0 或更高版本
android {
    ...
    buildFeatures {
        viewBinding true
    }
}

activity_main:

<LinearLayout
       android:orientation="vertical"
       android:layout_width="match_parent"
       android:layout_height="match_parent">
       
       <TextView android:id="@+id/tv_text"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"/>
</LinearLayout>

进行build 或 rebuild後，每个 Layout 就会对应生成一个绑定类别。如：MainActivity 的 Layout 为 activity_main，就会产生一个「ActivityMainBinding.java」

MainActivity:

public class MainActivity extends AppCompatActivity {
    private ResultProfileBinding binding;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       
       binding = ResultProfileBinding.inflate(getLayoutInflater());
       View view = binding.getRoot();
       setContentView(view);
       
       binding.tvText.setText("hello world");
    }
}

谢谢大家愿意花时间阅读，小弟弟我在此鞠躬