Butterknife

依赖

apply plugin: 'com.android.application'

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.0"
    defaultConfig {
        applicationId ""
        minSdkVersion 24
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'

  
    //绑定控件
    implementation 'com.jakewharton:butterknife:10.0.0'
    annotationProcessor 'com.jakewharton:butterknife-compiler:10.0.0'
    
}

Activity使用

    public class MainActivity extends AppCompatActivity {
    
        //获取控件
        @BindView(R.id.name)
        EditText name;
    
        @BindView(R.id.btn)
        Button btn;
        @BindView(R.id.txt)
        TextView txt;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            //绑定处理
            ButterKnife.bind(this);
        }
    
        //按钮点击事件处理
        @OnClick(R.id.btn)
        public void onViewClicked() {
    
            if (TextUtils.isEmpty(name.getText().toString().trim())){
                return;
            }
    
            if (name.getText().toString().trim().length() < 6){
                return;
            }
    
            txt.setText(name.getText());
        }
    }

Fragment使用：

    public class BlankFragment extends Fragment {
    
    
        @BindView(R.id.txt)
        TextView txt;
        @BindView(R.id.btn)
        Button btn;
    
    
        Unbinder unbinder;
    
        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            // Inflate the layout for this fragment
            View inflate = inflater.inflate(R.layout.fragment_blank, container, false);
            unbinder = ButterKnife.bind(this, inflate);
            return inflate;
        }
    
        @Override
        public void onDestroyView() {
            super.onDestroyView();
            unbinder.unbind();
        }
    
        @OnClick(R.id.btn)
        public void onViewClicked() {
    
        }
    }