简单创建Android(安卓)MVVM模式代码

import android.Manifest;import android.Manifest.permission;import android.annotation.SuppressLint;import android.content.Intent;import android.os.Build.VERSION;import android.os.Build.VERSION_CODES;import android.os.Bundle;import android.view.MenuItem;import android.view.WindowManager;import com.afollestad.materialdialogs.MaterialDialog;import com.elvishew.xlog.BuildConfig;import com.elvishew.xlog.XLog;import com.hexavii.core.R;import com.hexavii.core.arch.base.livedata.DataState;import com.hexavii.core.arch.base.viewmodel.BasicAndroidViewModel;import com.hexavii.core.arch.base.viewmodel.BasicViewModel;import com.hexavii.core.arch.tools.permission.RxPermissions;import com.hexavii.core.arch.utils.ToastUtil;import androidx.annotation.CallSuper;import androidx.annotation.NonNull;import androidx.annotation.Nullable;import androidx.appcompat.app.ActionBar;import androidx.appcompat.app.AppCompatActivity;import androidx.core.app.NavUtils;import androidx.core.app.TaskStackBuilder;import androidx.lifecycle.ViewModel;import io.reactivex.Observable;public abstract class BaseActivity extends AppCompatActivity implements  IBasicUIProcess {  protected static final boolean DEBUG = BuildConfig.DEBUG;  private VM mViewModel;  protected boolean isPad = false;  private MaterialDialog mDialog;  @CallSuper  @Override  protected void onCreate(Bundle savedInstanceState) {//    requestWindowFeature(Window.FEATURE_NO_TITLE);    super.onCreate(savedInstanceState);    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,      WindowManager.LayoutParams.FLAG_FULLSCREEN);    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);    requestPermissions();    if (DEBUG) {      XLog.d(getLocalClassName() + ":" + savedInstanceState);    }    isPad = getResources().getBoolean(R.bool.is_pad);    //页面接受的参数方法    initParam(savedInstanceState);    mViewModel = getViewModel();    initView(mViewModel);    //页面数据初始化方法    initData(savedInstanceState, mViewModel);    //页面事件监听的方法，一般用于ViewModel层转到View层的事件注册    initViewObservable(mViewModel);  }  // 请求权限  @SuppressLint("CheckResult")  public void requestPermissions() {    RxPermissions perm = RxPermissions.with(this);    Observable observable;    if (VERSION.SDK_INT >= VERSION_CODES.P) {      observable = perm.request(permission.FOREGROUND_SERVICE, permission.CAMERA,        permission.READ_PHONE_STATE,        permission.READ_EXTERNAL_STORAGE, permission.WRITE_EXTERNAL_STORAGE,        Manifest.permission.DISABLE_KEYGUARD);    } else {      observable = perm.request(permission.CAMERA, permission.READ_PHONE_STATE,        permission.READ_EXTERNAL_STORAGE, permission.WRITE_EXTERNAL_STORAGE,        Manifest.permission.DISABLE_KEYGUARD);    }    observable.doOnNext(granted -> {      if (!granted) {        XLog.i("权限未申请");        ToastUtil.showLongToast(BaseActivity.this, "应用必要权限未授予");      }      onPermissionsGranted(granted);    }).subscribe();  }  protected void onPermissionsGranted(boolean granted) {}  @Override  protected void onNewIntent(final Intent intent) {    super.onNewIntent(intent);    if (DEBUG) {      XLog.d("onNewIntent: " + getLocalClassName());    }  }  @Override  protected void onRestart() {    super.onRestart();    if (DEBUG) {      XLog.d("onRestart: " + getLocalClassName());    }  }  @CallSuper  @Override  protected void onStart() {    super.onStart();    if (DEBUG) {      XLog.d("onStart: " + getLocalClassName());    }  }  @Override  protected void onRestoreInstanceState(Bundle savedInstanceState) {    super.onRestoreInstanceState(savedInstanceState);    if (DEBUG) {      XLog.d("onRestoreInstanceState: " + getLocalClassName());    }  }  @CallSuper  @Override  protected void onResume() {    super.onResume();    if (DEBUG) {      XLog.d("resume: " + getLocalClassName());    }  }  @CallSuper  @Override  protected void onPause() {    super.onPause();    if (DEBUG) {      XLog.d("stop: " + getLocalClassName());    }  }  @Override  protected void onSaveInstanceState(@NonNull Bundle outState) {    super.onSaveInstanceState(outState);    if (DEBUG) {      XLog.d("onSaveInstanceState: " + getLocalClassName());    }  }  @Override  protected void onStop() {    super.onStop();    if (DEBUG) {      XLog.d("stop: " + getLocalClassName());    }  }  @CallSuper  @Override  protected void onDestroy() {    super.onDestroy();    if (DEBUG) {      XLog.d("onDestroy: " + getLocalClassName());    }    // 解除ViewModel生命周期感应    ViewModel vm = getViewModel();    if (null != vm) {      if (vm instanceof BasicViewModel) {        getLifecycle().removeObserver((BasicViewModel) vm);      } else if (vm instanceof BasicAndroidViewModel) {        getLifecycle().removeObserver((BasicAndroidViewModel) vm);      }    }    mViewModel = null;    if (null != mDialog) {      mDialog.dismiss();      mDialog = null;    }  }  @Override  public VM createViewModel() {    return null;  }  @Override  public void initView(VM vm) {  }  @Override  public void initParam(@Nullable final Bundle savedInstanceState) {  }  @Override  public void initData(Bundle savedInstanceState, VM vm) {  }  public VM getViewModel() {    if (null == mViewModel) {      mViewModel = createViewModel();    }    return mViewModel;  }  @Override  public void initViewObservable(VM vm) {    if (null != vm) {      if (vm instanceof BasicViewModel) {        registerStateCallBack(((BasicViewModel) vm).getState());        // 让ViewModel拥有View的生命周期感应        getLifecycle().addObserver((BasicViewModel) vm);      } else if (vm instanceof BasicAndroidViewModel) {        registerStateCallBack(((BasicAndroidViewModel) vm).getState());        // 让ViewModel拥有View的生命周期感应        getLifecycle().addObserver((BasicAndroidViewModel) vm);      }    }  }  protected void registerStateCallBack(DataState state) {    state.observe(this, this::onStateChanged);  }  protected void onStateChanged(Integer state) {    if (null != mDialog) {      mDialog.dismiss();      mDialog = null;    }    switch (state) {      case DataState.DIALOG_LOADING:        mDialog = new MaterialDialog.Builder(this)          .content(R.string.api_loading)          .progress(true, 0).show();        break;      case DataState.CONTENT:        break;      case DataState.EMPTY:        break;      case DataState.ERROR:        break;      case DataState.ACTIVITY_FINISHED:        finish();        break;    }  }  /**   * 跳转页面   *   * @param clz   *     所跳转的目的Activity类   */  public void startActivity(Class<?> clz) {    startActivity(new Intent(this, clz));  }  /**   * 跳转页面   *   * @param clz   *     所跳转的目的Activity类   * @param bundle   *     跳转所携带的信息   */  public void startActivity(Class<?> clz, Bundle bundle) {    Intent intent = new Intent(this, clz);    if (bundle != null) {      intent.putExtras(bundle);    }    startActivity(intent);  }  /**   * 跳转容器页面   *   * @param canonicalName   *     规范名 : Fragment.class.getCanonicalName()   */  public void startContainerActivity(String canonicalName) {    startContainerActivity(canonicalName, null);  }  /**   * 跳转容器页面   *   * @param canonicalName   *     规范名 : Fragment.class.getCanonicalName()   * @param bundle   *     跳转所携带的信息   */  public void startContainerActivity(String canonicalName, Bundle bundle) {    Intent intent = new Intent(this, ContainerActivity.class);    intent.putExtra(ContainerActivity.FRAGMENT, canonicalName);    if (bundle != null) {      intent.putExtra(ContainerActivity.BUNDLE, bundle);    }    startActivity(intent);  }  protected void setDisplayHomeAsUpEnable(boolean enable) {    // Show the Up button in the action bar.    ActionBar actionBar = getSupportActionBar();    if (actionBar != null) {      actionBar.setDisplayHomeAsUpEnabled(enable);    }  }  @Override  public boolean onOptionsItemSelected(MenuItem item) {    int id = item.getItemId();    if (id == android.R.id.home) {      Intent upIntent = NavUtils.getParentActivityIntent(this);      if (null == upIntent) {        finish();      } else if (NavUtils.shouldUpRecreateTask(this, upIntent)) {        // This activity is NOT part of this app's task, so create a new task        // when navigating up, with a synthesized back stack.        TaskStackBuilder.create(this)                        // Add all of this activity's parents to the back stack                        .addNextIntentWithParentStack(upIntent)                        // Navigate up to the closest parent                        .startActivities();      } else {        // This activity is part of this app's task, so simply        // navigate up to the logical parent activity.        NavUtils.navigateUpTo(this, upIntent);      }      return true;    }    return super.onOptionsItemSelected(item);  }  @Override  public void startActivity(final Intent intent) {    super.startActivity(intent);    overridePendingTransition(R.anim.fade_out, R.anim.fade_in);  }}

BaseActivity创建新的类依赖于它

然后创建BAsicViewModel

import androidx.lifecycle.Lifecycle;import androidx.lifecycle.LifecycleOwner;import androidx.lifecycle.MutableLiveData;import androidx.lifecycle.ViewModel;public class BasicViewModel extends ViewModel implements IBasicViewModel {  private DataState mState;  private MutableLiveData mTitle;  public DataState getState() {    if (mState == null) {      mState = DataState.getInstance();    }    return mState;  }  public MutableLiveData getNavTitle() {    if (mTitle == null) {      mTitle = new MutableLiveData<>();    }    return mTitle;  }  @Override  public void onAny(LifecycleOwner owner, Lifecycle.Event event) {  }  @Override  public void onCreate() {  }  @Override  public void onDestroy() {  }  @Override  public void onStart() {  }  @Override  public void onStop() {  }  @Override  public void onResume() {  }  @Override  public void onPause() {  }}

DataState类

import androidx.lifecycle.MutableLiveData;public class DataState extends MutableLiveData {  public static final int ACTIVITY_FINISHED = -2;  public static final int DIALOG_LOADING = -1;  public static final int LOADING = 0;  public static final int CONTENT = 2;  public static final int EMPTY = 3;  public static final int ERROR = 4;  public void setActivityFinished() {    setValue(ACTIVITY_FINISHED);  }  public void postActivityFinished() {    postValue(ACTIVITY_FINISHED);  }  public void setDialogLoading() {    setValue(DIALOG_LOADING);  }  public void postDialogLoading() {    postValue(DIALOG_LOADING);  }  public void setLoading() {    setValue(LOADING);  }  public void postLoading() {    postValue(LOADING);  }  public void setContent() {    setValue(CONTENT);  }  public void postContent() {    postValue(CONTENT);  }  public void setEmpty() {    setValue(EMPTY);  }  public void postEmpty() {    postValue(EMPTY);  }  public void setError() {    setValue(ERROR);  }  public void postError() {    postValue(ERROR);  }  public static DataState getInstance() {    return new DataState();  }}

然后在activity_xxxml中设置

这段代码一定要在标签里面

主界面Activity可以这么写

package com.hexavii.facepassage.compare.ui;import android.content.Context;import android.content.Intent;import android.os.Bundle;import androidx.databinding.DataBindingUtil;import androidx.lifecycle.ViewModelProvider;import com.hexavii.core.arch.base.BaseActivity;import com.hexavii.core.arch.tools.systemui.SystemUiHelper;import com.hexavii.facepassage.R;import com.hexavii.facepassage.compare.viewmodel.FaceCompareViewModel;import com.hexavii.facepassage.databinding.ActivityFaceCompareBinding;public class FaceCompareActivity   extends BaseActivity {  public static void start(Context context,int value) {    Intent starter = new Intent(context, FaceCompareActivity.class);    starter.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED      | Intent.FLAG_ACTIVITY_CLEAR_TASK);    starter.putExtra("type",value);    context.startActivity(starter);  }  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);  }  @Override  public void onWindowFocusChanged(boolean hasFocus) {    if (hasFocus) {      SystemUiHelper uiHelper = new SystemUiHelper(this, SystemUiHelper.LEVEL_IMMERSIVE,        SystemUiHelper.FLAG_IMMERSIVE_STICKY);      uiHelper.hide();    }  }  @Override  public void initView(FaceCompareViewModel faceCompareViewModel) {    ActivityFaceCompareBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_face_compare);    binding.setViewModel(getViewModel());    binding.setLifecycleOwner(this);  }  @Override  public void initData(Bundle savedInstanceState, FaceCompareViewModel faceCompareViewModel) {    super.initData(savedInstanceState, faceCompareViewModel);  }  @Override  public FaceCompareViewModel createViewModel() {    return new ViewModelProvider(this).get(FaceCompareViewModel.class);  }  @Override  public void initViewObservable(FaceCompareViewModel vm) {    super.initViewObservable(vm);    vm.getCheckState().observe(this, state -> {      if (null == state ) {        return;      }    });  }}

viewModel这么实现

package com.hexavii.facepassage.compare.viewmodel;import androidx.lifecycle.MutableLiveData;import com.hexavii.core.arch.base.viewmodel.BasicViewModel;public class FaceCompareViewModel extends BasicViewModel {  private MutableLiveData mCheckState = new MutableLiveData<>();  public MutableLiveData getCheckState() {    return mCheckState;  }}

然后就可以设置xml中的实现了

以下为MVVM 模式 Android端实现是不是很简单~

更多相关文章

随机推荐