Android实现MVVM架构数据刷新详解流程 Android实现MVVM架构数据刷新详解

效果图
示例结构图

代码解析

导入dataBinding
实体类
xml视图
VM
绑定视图与数据层

效果图

文章图片

示例结构图

文章图片

代码解析

导入dataBinding

dataBinding{enabled = true}

实体类继承BaseObservable

public class Sensor extends BaseObservable

为字段添加@Bindable

@Bindablepublic String getTmpValue() {return tmpValue; }

显示图片
图片添加@BindingAdapter

@BindingAdapter( "tmpImage" )

示例采用本地图片，没有采用网络图片

@BindingAdapter( "tmpImage" )public static void setTmpImage(ImageView view, int tmpImage) {view.setImageDrawable( view.getContext().getResources().getDrawable( tmpImage ) ); }

为图片路径绑定字段

@Bindablepublic int getTmpImage() {return tmpImage; }

绑定实体类

根据设置@BindingAdapter( “tmpImage” )设置里的内容，设置属性

实体类全部代码

public class Sensor extends BaseObservable {private String tmpValue; private String humValue; private String lightValue; private String humanValue; private String smokeValue; private String fireValue; private int tmpImage; private int humImage; private int lightImage; private int humanImage; private int smokeImage; private int fireImage; public Sensor(){}public Sensor(int tmpImage,int humImage,int lightImage,int humanImage,int smokeImage,int fireImage){this.tmpImage = tmpImage; this.humImage = humImage; this.lightImage = lightImage; this.humanImage = humanImage; this.smokeImage = smokeImage; this.fireImage = fireImage; }@Bindablepublic String getTmpValue() {return tmpValue; }public void setTmpValue(String tmpValue) {this.tmpValue = https://www.it610.com/article/tmpValue; notifyPropertyChanged( BR.tmpValue ); }@Bindablepublic String getHumValue() {return humValue; }public void setHumValue(String humValue) {this.humValue = humValue; notifyPropertyChanged( BR.humValue ); }@Bindablepublic String getLightValue() {return lightValue; }public void setLightValue(String lightValue) {this.lightValue = lightValue; notifyPropertyChanged( BR.lightValue ); }@Bindablepublic String getHumanValue() {return humanValue; }public void setHumanValue(String humanValue) {this.humanValue = humanValue; notifyPropertyChanged( BR.humanValue ); }@Bindablepublic String getSmokeValue() {return smokeValue; }public void setSmokeValue(String smokeValue) {this.smokeValue = smokeValue; notifyPropertyChanged( BR.smokeValue ); }@Bindablepublic String getFireValue() {return fireValue; }public void setFireValue(String fireValue) {this.fireValue = fireValue; notifyPropertyChanged( BR.fireValue ); }@Bindablepublic int getTmpImage() {return tmpImage; }@BindingAdapter("tmpImage" )public static void setTmpImage(ImageView view, int tmpImage) {view.setImageDrawable( view.getContext().getResources().getDrawable( tmpImage ) ); }@Bindablepublic int getLightImage() {return lightImage; }@BindingAdapter( "lightImage" )public static void setLightImage(ImageView view,int lightImage) {view.setImageDrawable( view.getContext().getResources().getDrawable( lightImage ) ); }@Bindablepublic int getHumanImage() {return humanImage; }@BindingAdapter( "humanImage" )public static void setHumanImage(ImageView view,int humanImage) {view.setImageDrawable( view.getContext().getResources().getDrawable( humanImage ) ); }@Bindablepublic int getSmokeImage() {return smokeImage; }@BindingAdapter( "smokeImage" )public static void setSmokeImage(ImageView view,int smokeImage) {view.setImageDrawable( view.getContext().getResources().getDrawable( smokeImage ) ); }@Bindablepublic int getFireImage() {return fireImage; }@BindingAdapter( "fireImage" )public static void setFireImage(ImageView view,int fireImage) {view.setImageDrawable( view.getContext().getResources().getDrawable( fireImage ) ); }@Bindablepublic int getHumImage() {return humImage; }@BindingAdapter( "humImage" )public static void setHumImage(ImageView view,int humImage) {view.setImageDrawable( view.getContext().getResources().getDrawable( humImage ) ); }}

xml视图

VM 接收数据
调用Handle类的接口，接收传感器数据(随机数据)

private void InitData(){handle.setHandleDta( new Handle.HandleData() {@Overridepublic void getSensorValue(int[] value) {new Thread( ()->{while (true){try {Thread.sleep( 5000 ); } catch (InterruptedException e) {e.printStackTrace(); }sensor.setTmpValue( value[0]+"℃"); sensor.setHumValue( value[1]+"RH" ); sensor.setLightValue( value[2]+"LUX" ); sensor.setSmokeValue( value[3]+"%" ); sensor.setFireValue( value[4]+"%" ); sensor.setHumanValue( value[5] == 1 ? "有人" : "无人" ); }} ).start(); }}); }

发送数据
建立接口，回调数据

public interface HandleData{void getSensorValue(int[] value); }public void setHandleDta(HandleData handleDta){int[] value = https://www.it610.com/article/ReturnData(); handleDta.getSensorValue(value); }

【Android实现MVVM架构数据刷新详解流程】制造数据

private void RefreshSensorValue(){thread = new Thread( ()->{while (true){try {Thread.sleep( 2000 ); } catch (InterruptedException e) {e.printStackTrace(); }/*温度*/value[0] = RandomRange(35,30); /*湿度*/value[1] = RandomRange(80,75); /*光照值*/value[2] = RandomRange(120,100); /*烟雾*/value[3] = RandomRange(60,50); /*火焰*/value[4] = RandomRange(30,25); /*红外*/value[5] = RandomRange(2,0); Log.d( "TAG",value[5]+"" ); }} ); thread.start(); }

绑定视图与数据层

public class MainActivity extends AppCompatActivity {private ActivityMainBinding binding; @Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate( savedInstanceState ); binding = DataBindingUtil.setContentView( this,R.layout.activity_main ); binding.setViewmodel( new ViewModel() ); }}

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