Android 简单的MVP封装
转载请注明出处:https://blog.csdn.net/a512337862/article/details/85165567
前言
之前写过一个普通的BaseActivity,Fragment封装https://blog.csdn.net/a512337862/article/details/81448736，这次的MVP封装是在上次的基础上进行添加修改的。主要功能如下：
- Handler的弱引用
- Toast,Loading加载框的显示（可任意在主/子线程中调用）
- Fragment 替换
- activity 跳转
- 沉浸栏相关
- MVP相关
- 其他相关封装
BaseMvpViewImpl
BaseMvpViewImpl是View层需要继承的基类接口，在presenter中通过getView().XXX来调用。这里只封装了Toast,Loading加载框相关的接口。可以根据项目的需求自行添加。
import android.support.annotation.StringRes;
/**
* Author ： BlackHao
* Time : 2018/12/19 19:11
* Description : View 层基类
*/
public interface BaseMvpViewImpl {
/**
* Toast相关
*/
void showToast(@StringRes int strId);
void showToast(String str);
/**
* 加载框相关
*/
void showLoading(@StringRes int strId);
void showLoading(String str);
void showLoading();
void dismissLoading();
}
BaseMvpPresenterImpl
BaseMvpViewImpl是Presenter层需要继承的基类接口，在View层（activity/fragment）中通过getPresenter().XXX来调用。这里只封装了activity/fragment生命周期相关的接口。可以根据项目的需求自行添加。
/**
* Author ： BlackHao
* Time : 2018/12/19 19:48
* Description : Presenter 封装
*/
public interface BaseMvpPresenterImpl {
/**
* 开始创建 View
*/
void onViewCreate();
/**
* View 创建完成
*/
void onViewCreated();
/**
* Activity / fragment 生命周期
*/
void onResume();
void onStart();
void onPause();
void onStop();
void onDestroy();
}
BaseMvpPresenter
BaseMvpPresenter是Presenter的基类，这里主要是对ViewImpl,Context实现了弱引用，并提供获取ViewImpl,Context的方法，避免内存泄漏。
import android.content.Context;
import java.lang.ref.WeakReference;
/**
* Author ： BlackHao
* Time : 2018/12/20 09:05
* Description : Presenter 封装
*/
public abstract class BaseMvpPresenter implements BaseMvpPresenterImpl {
/**
* 弱引用持有,避免造成内存泄漏
*/
private WeakReference mView;
private WeakReference mContext;
public BaseMvpPresenter(Context context, T mView) {
this.mView = new WeakReference<>(mView);
this.mContext = new WeakReference<>(context);
}
public T getView() {
return mView.get();
}
public Context getContext() {
return mContext.get();
}
@Override
public void onViewCreate() {
}
@Override
public void onViewCreated() {
}
@Override
public void onResume() {
}
@Override
public void onStart() {
}
@Override
public void onPause() {
}
@Override
public void onStop() {
}
@Override
public void onDestroy() {
}
}
BaseMvpActivity/BaseMvpFragment
BaseMvpActivity/BaseMvpFragment 是View的基类,只需重写initPresenter()即可通过getPresenter()来获取PresenterImpl,从而调用对应Presenter中的方法。如果不需要调用，可以直接在initPresenter()中返回null。
因为BaseMvpFragment很多方法的实现都是通过调用BaseMvpActivity中的方法来实现的，所以BaseMvpFragment必须在BaseMvpActivity中调用。
BaseMvpActivity
import android.annotation.StringRes;
import android.content.Intent;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.support.annotation.IdRes;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.util.SparseArray;
import android.view.View;
import android.widget.Toast;
import com.balckhao.blackhaoutil.base.LoadingDialog;
import com.balckhao.blackhaoutil.logUtil.LogUtil;
import java.lang.ref.WeakReference;
/**
* Author ： BlackHao
* Time : 2018/12/20 16:38
* Description : Base MVP Activity
*/
public abstract class BaseMvpActivity extends AppCompatActivity implements BaseMvpViewImpl {
//Handler
public WeakHandler handler;
//用于保存对应 FrameLayout当前显示的 Fragment
private SparseArray fragmentArray;
//LogUtil
public LogUtil log;
//加载框
private LoadingDialog loadingDialog;
// Presenter
private T mPresenter;
//使用状态栏模式
private int statusMode = -1;
/**
* 不使用状态栏
*/
public static int NO_STATUS = -1;
/**
* 沉浸式状态栏
*/
public static int TRANSLUCENT_STATUS = 1;
/**
* 隐藏状态栏
*/
public static int HIDE_STATUS = 2;
/**
* 全屏（隐藏状态栏和导航栏）
*/
public static int FULL_SCREEN_STATUS = 3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//初始化Log
log = LogUtil.getInstance();
//初始化fragmentArray
fragmentArray = new SparseArray<>();
//
loadingDialog = new LoadingDialog();
//获取presenter
mPresenter = initPresenter();
if (mPresenter != null)
mPresenter.onViewCreate();
//初始化UI
initUI();
//初始化weakHandler
initHandler();
//隐藏 ActionBar
if (getSupportActionBar() != null) {
getSupportActionBar().hide();
}
//更改状态栏模式
statusMode = getStatusMode();
if (statusMode == TRANSLUCENT_STATUS) {
translucentStatus();
} else if (statusMode == HIDE_STATUS) {
hideStatusBar();
}
//view 初始化完成
getWindow().getDecorView().post(new Runnable() {
@Override
public void run() {
//
if (mPresenter != null)
mPresenter.onViewCreated();
//初始化数据
initData();
//添加listener
initListener();
}
});
}
/**
* 初始化UI
*/
protected abstract void initUI();
/**
* UI初始化完成,初始化数据
*/
protected abstract void initData();
/**
* UI初始化完成,初始化接口
*/
protected abstract void initListener();
/**
* 子类要处理 handler的消息，重写该方法
*/
protected abstract void handleMessage(Message msg);
/**
* 初始化 Handler
*/
private void initHandler() {
handler = new WeakHandler(this);
}
/**
* 初始化 presenter
*/
protected abstract T initPresenter();
/**
* 获取 presenter
*/
public T getPresenter() {
return mPresenter;
}
/**
* 获取状态栏模式（默认无状态栏模式，修改状态栏模式只需重写该方法）
*/
public int getStatusMode() {
return NO_STATUS;
}
/**
* 显示 Toast（可以在子线程中调用）
*/
@Override
public void showToast(final String str) {
if (!isUIThread()) {
handler.post(new Runnable() {
@Override
public void run() {
showToast(str);
}
});
return;
}
Toast.makeText(BaseMvpActivity.this, str, Toast.LENGTH_SHORT).show();
}
/**
* 显示 Toast（可以在子线程中调用）
*/
@Override
public void showToast(@StringRes int strId) {
showToast(getString(strId));
}
/**
* 加载框相关
*/
@Override
public void showLoading(@StringRes int strId) {
showLoading(getString(strId));
}
@Override
public void showLoading(final String str) {
if (!isUIThread()) {
handler.post(new Runnable() {
@Override
public void run() {
showLoading(str);
}
});
return;
}
log.e("show : " + str);
loadingDialog.setLoadingTxt(str);
loadingDialog.show(getSupportFragmentManager(), "loading");
}
@Override
public void showLoading() {
showLoading("");
}
@Override
public void dismissLoading() {
if (!isUIThread()) {
handler.post(new Runnable() {
@Override
public void run() {
dismissLoading();
}
});
return;
}
loadingDialog.dismiss();
}
/**
* 替换 fragment
*
* @param frameId frameLayout id
* @param showFragment 需要显示的 Fragment
*/
public void replaceFragment(@IdRes int frameId, Fragment showFragment) {
Fragment currentFragment = fragmentArray.get(frameId);
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
//用于fragment的显示与隐藏
if (currentFragment != null && currentFragment != showFragment) {
if (!showFragment.isAdded()) { // 先判断是否被add过
transaction.hide(currentFragment).add(frameId, showFragment).commit(); // 隐藏当前的fragment，add下一个到Activity中
} else {
transaction.hide(currentFragment).show(showFragment).commit(); // 隐藏当前的fragment，显示下一个
}
fragmentArray.put(frameId, showFragment);
} else if (currentFragment == null) {
if (!showFragment.isAdded()) { // 先判断是否被add过
transaction.add(frameId, showFragment).commit(); // 隐藏当前的fragment，add下一个到Activity中
} else {
transaction.show(showFragment).commit(); // 隐藏当前的fragment，显示下一个
}
fragmentArray.put(frameId, showFragment);
}
}
/**
* activity 跳转
*
* @param target 需要跳转的 Activity
* @param bundle bundle
* @param isCloseSelf 是否关闭当前的 activity
*/
public void openActivity(Class target, Bundle bundle, boolean isCloseSelf) {
Intent intent = new Intent(this, target);
if (bundle != null) {
intent.putExtras(bundle);
}
startActivity(intent);
if (isCloseSelf) {
finish();
}
}
/**
* activity 跳转（不需要传值）
*
* @param target 需要跳转的Activity
*/
public void openActivity(Class target) {
openActivity(target, null, false);
}
/**
* activity 跳转
*
* @param target 需要跳转的 Activity
* @param bundle bundle
* @param requestCode requestCode
*/
public void openActivityForResult(Class target, Bundle bundle, int requestCode) {
Intent intent = new Intent(this, target);
if (bundle != null) {
intent.putExtras(bundle);
}
startActivityForResult(intent, requestCode);
}
/**
* 生命周期相关
*/
@Override
protected void onResume() {
super.onResume();
if (mPresenter != null)
mPresenter.onResume();
}
@Override
protected void onPause() {
super.onPause();
if (mPresenter != null)
mPresenter.onPause();
}
@Override
protected void onStart() {
super.onStart();
if (mPresenter != null)
mPresenter.onStart();
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mPresenter != null)
mPresenter.onDestroy();
}
@Override
protected void onStop() {
super.onStop();
if (mPresenter != null)
mPresenter.onStop();
}
/**
* 判断当前线程是否在主线程
*/
public boolean isUIThread() {
return Thread.currentThread().getId() == Looper.getMainLooper().getThread().getId();
}
/**
* 沉浸式状态栏
*/
public void translucentStatus() {
//5.0及以上系统才支持
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.L) {
View decorView = getWindow().getDecorView();
int option = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
decorView.setSystemUiVisibility(option);
getWindow().setStatusBarColor(Color.TRANSPARENT);
}
}
/**
* 隐藏状态栏
*/
public void hideStatusBar() {
View decorView = getWindow().getDecorView();
int option = View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(option);
}
@Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
//Android 4.4及以上系统才支持
if (statusMode == FULL_SCREEN_STATUS && hasFocus && Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
View decorView = getWindow().getDecorView();
decorView.setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
}
}
/**
* 弱引用 handler
*/
public static class WeakHandler extends Handler {
WeakReference weakReference;
WeakHandler(BaseMvpActivity activity) {
this.weakReference = new WeakReference<>(activity);
}
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
BaseMvpActivity activity = (BaseMvpActivity) weakReference.get();
switch (msg.what) {
default:
if (activity != null) {
activity.handleMessage(msg);
}
break;
}
}
}
}
BaseMvpFragment
import android.annotation.StringRes;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.IdRes;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.util.SparseArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.balckhao.blackhaoutil.logUtil.LogUtil;
/**
* Author ： BlackHao
* Time : 2018/12/20 16:38
* Description : Base MVP Fragment (必须在 BaseMvpActivity 中调用)
*/
public abstract class BaseMvpFragment extends Fragment implements BaseMvpViewImpl {
//用于保存对应 FrameLayout当前显示的 Fragment
private SparseArray fragmentArray;
//LogUtil
public LogUtil log;
// Presenter
private T mPresenter;
//Activity
private BaseMvpActivity activity;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
activity = (BaseMvpActivity) getActivity();
mPresenter = initPresenter();
//
fragmentArray = new SparseArray<>();
log = activity.log;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(initLayoutId(), container, false);
initUI(view);
//
if (mPresenter != null)
mPresenter.onViewCreate();
return view;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
initData();
initListener();
if (mPresenter != null)
mPresenter.onViewCreated();
}
/**
* 初始化UI
*/
protected abstract int initLayoutId();
/**
* 初始化UI
*/
protected abstract void initUI(View view);
/**
* UI初始化完成,初始化数据
*/
protected abstract void initData();
/**
* UI初始化完成,初始化接口
*/
protected abstract void initListener();
/**
* 初始化 presenter
*/
protected abstract T initPresenter();
/**
* 获取 presenter
*/
public T getPresenter() {
return mPresenter;
}
/**
* 显示 Toast（可以在子线程中调用）
*/
@Override
public void showToast(final String str) {
activity.showToast(str);
}
/**
* 显示 Toast（可以在子线程中调用）
*/
@Override
public void showToast(@StringRes int strId) {
showToast(getString(strId));
}
/**
* 加载框相关
*/
@Override
public void showLoading(@StringRes int strId) {
showLoading(getString(strId));
}
@Override
public void showLoading(String str) {
activity.showLoading(str);
}
@Override
public void showLoading() {
activity.showLoading();
}
@Override
public void dismissLoading() {
activity.dismissLoading();
}
/**
* 替换 fragment
*
* @param frameId frameLayout id
* @param showFragment 需要显示的 Fragment
*/
public void replaceFragment(@IdRes int frameId, Fragment showFragment) {
Fragment currentFragment = fragmentArray.get(frameId);
FragmentTransaction transaction = getFragmentManager().beginTransaction();
//用于fragment的显示与隐藏
if (currentFragment != null && currentFragment != showFragment) {
if (!showFragment.isAdded()) { // 先判断是否被add过
transaction.hide(currentFragment).add(frameId, showFragment).commit(); // 隐藏当前的fragment，add下一个到Activity中
} else {
transaction.hide(currentFragment).show(showFragment).commit(); // 隐藏当前的fragment，显示下一个
}
fragmentArray.put(frameId, showFragment);
} else if (currentFragment == null) {
if (!showFragment.isAdded()) { // 先判断是否被add过
transaction.add(frameId, showFragment).commit(); // 隐藏当前的fragment，add下一个到Activity中
} else {
transaction.show(showFragment).commit(); // 隐藏当前的fragment，显示下一个
}
fragmentArray.put(frameId, showFragment);
}
}
/**
* activity 跳转
*
* @param target 需要跳转的 Activity
* @param bundle bundle
* @param isCloseSelf 是否关闭当前的 activity
*/
public void openActivity(Class target, Bundle bundle, boolean isCloseSelf) {
Intent intent = new Intent(getContext(), target);
if (bundle != null) {
intent.putExtras(bundle);
}
startActivity(intent);
if (isCloseSelf) {
activity.finish();
}
}
/**
* activity 跳转（不需要传值）
*
* @param target 需要跳转的Activity
*/
public void openActivity(Class target) {
openActivity(target, null, false);
}
/**
* activity 跳转
*
* @param target 需要跳转的 Activity
* @param bundle bundle
* @param requestCode requestCode
*/
public void openActivityForResult(Class target, Bundle bundle, int requestCode) {
Intent intent = new Intent(getContext(), target);
if (bundle != null) {
intent.putExtras(bundle);
}
startActivityForResult(intent, requestCode);
}
/**
* 生命周期相关
*/
@Override
public void onResume() {
super.onResume();
if (mPresenter != null)
mPresenter.onResume();
}
@Override
public void onPause() {
super.onPause();
if (mPresenter != null)
mPresenter.onPause();
}
@Override
public void onStart() {
super.onStart();
if (mPresenter != null)
mPresenter.onStart();
}
@Override
public void onDestroy() {
super.onDestroy();
if (mPresenter != null)
mPresenter.onDestroy();
}
@Override
public void onStop() {
super.onStop();
if (mPresenter != null)
mPresenter.onStop();
}
}
结语
- 源码以及测试demo下载地址：https://github.com/LuoChen-Hao/BlackHaoUtil
- 有任何问题请留言。