version:2.3

fix: update:更新应用卸载安装时桌面实时添加数据
2022-06-25 18:21:10 +08:00
parent 3b8844ba4e
commit dc5455926a
9 changed files with 329 additions and 20 deletions
--- a/app/src/main/java/com/uiui/aios/fragment/BaseFragmentPagerAdapter.java
+++ b/app/src/main/java/com/uiui/aios/fragment/BaseFragmentPagerAdapter.java
@@ -162,7 +162,7 @@ public class BaseFragmentPagerAdapter extends FragmentPagerAdapter {
        notifyItemChanged();
    }

-    private void notifyItemChanged() {
+    public void notifyItemChanged() {
        //刷新之前重新收集位置信息
        setFragmentPositionMapForUpdate();
        notifyDataSetChanged();
--- a/app/src/main/java/com/uiui/aios/fragment/CustomPagerAdapter.java
+++ b/app/src/main/java/com/uiui/aios/fragment/CustomPagerAdapter.java
@@ -0,0 +1,29 @@
+package com.uiui.aios.fragment;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+import androidx.lifecycle.Lifecycle;
+import androidx.viewpager2.adapter.FragmentStateAdapter;
+
+import java.util.List;
+
+public class CustomPagerAdapter extends FragmentStateAdapter {
+    List<Fragment> fragmentList;
+
+    public CustomPagerAdapter(FragmentManager fm, List<Fragment> fragmentList, Lifecycle lifecycle) {
+        super(fm, lifecycle);
+        this.fragmentList = fragmentList;
+    }
+
+    @NonNull
+    @Override
+    public Fragment createFragment(int position) {
+        return fragmentList.get(position);
+    }
+
+    @Override
+    public int getItemCount() {
+        return fragmentList.size();
+    }
+}
--- a/app/src/main/java/com/uiui/aios/fragment/SecondFragment.java
+++ b/app/src/main/java/com/uiui/aios/fragment/SecondFragment.java
@@ -269,13 +269,17 @@ public class SecondFragment extends BaseFragment {
    }

    private void openApp(int position) {
-        Intent intent = new Intent(Intent.ACTION_MAIN);
-        /*知道要跳转应用的包命与目标Activity*/
-        ComponentName componentName = new ComponentName("com.uiui.city", "com.uiui.city.activity.MainActivity");
-        intent.putExtra("position", position);
-        intent.setComponent(componentName);
-        intent.putExtra("", "");//这里Intent传值
-        startActivity(intent);
+        try {
+            Intent intent = new Intent(Intent.ACTION_MAIN);
+            /*知道要跳转应用的包命与目标Activity*/
+            ComponentName componentName = new ComponentName("com.uiui.city", "com.uiui.city.activity.MainActivity");
+            intent.putExtra("position", position);
+            intent.setComponent(componentName);
+            intent.putExtra("", "");//这里Intent传值
+            startActivity(intent);
+        } catch (Exception e) {
+            Log.e(TAG, "openApp: " + e.getMessage());
+        }
    }

    private void getGoods() {
--- a/app/src/main/java/com/uiui/aios/fragment/ViewPager2Adapter.java
+++ b/app/src/main/java/com/uiui/aios/fragment/ViewPager2Adapter.java
@@ -0,0 +1,227 @@
+package com.uiui.aios.fragment;
+
+import android.util.SparseArray;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+import androidx.fragment.app.FragmentPagerAdapter;
+import androidx.fragment.app.FragmentTransaction;
+import androidx.lifecycle.Lifecycle;
+import androidx.viewpager2.adapter.FragmentStateAdapter;
+
+import java.util.List;
+
+/**
+ * 加载显示Fragment的ViewPagerAdapter基类
+ * 提供可以刷新的方法
+ *
+ * @author Fly
+ * @e-mail 1285760616@qq.com
+ * @time 2018/3/22
+ */
+public class ViewPager2Adapter extends FragmentStateAdapter {
+    private List<Fragment> mFragmentList;
+    private FragmentManager mFragmentManager;
+    /**
+     * 下面两个值用来保存Fragment的位置信息，用以判断该位置是否需要更新
+     */
+    private SparseArray<String> mFragmentPositionMap;
+    private SparseArray<String> mFragmentPositionMapAfterUpdate;
+
+    public ViewPager2Adapter(FragmentManager fm, List<Fragment> fragments, Lifecycle lifecycle) {
+        super(fm, lifecycle);
+        mFragmentList = fragments;
+        mFragmentManager = fm;
+        mFragmentList = fragments;
+        mFragmentPositionMap = new SparseArray<>();
+        mFragmentPositionMapAfterUpdate = new SparseArray<>();
+        setFragmentPositionMap();
+        setFragmentPositionMapForUpdate();
+    }
+
+    /**
+     * 保存更新之前的位置信息，用<hashCode, position>的键值对结构来保存
+     */
+    private void setFragmentPositionMap() {
+        mFragmentPositionMap.clear();
+        for (int i = 0; i < mFragmentList.size(); i++) {
+            mFragmentPositionMap.put(Long.valueOf(getItemId(i)).intValue(), String.valueOf(i));
+        }
+    }
+
+    /**
+     * 保存更新之后的位置信息，用<hashCode, position>的键值对结构来保存
+     */
+    private void setFragmentPositionMapForUpdate() {
+        mFragmentPositionMapAfterUpdate.clear();
+        for (int i = 0; i < mFragmentList.size(); i++) {
+            mFragmentPositionMapAfterUpdate.put(Long.valueOf(getItemId(i)).intValue(), String.valueOf(i));
+        }
+    }
+
+//    /**
+//     * 在此方法中找到需要更新的位置返回POSITION_NONE，否则返回POSITION_UNCHANGED即可
+//     */
+//    @Override
+//    public int getItemPosition(Object object) {
+//        int hashCode = object.hashCode();
+//        //查找object在更新后的列表中的位置
+//        String position = mFragmentPositionMapAfterUpdate.get(hashCode);
+//        //更新后的列表中不存在该object的位置了
+//        if (position == null) {
+//            return POSITION_NONE;
+//        } else {
+//            //如果更新后的列表中存在该object的位置, 查找该object之前的位置并判断位置是否发生了变化
+//            int size = mFragmentPositionMap.size();
+//            for (int i = 0; i < size ; i++) {
+//                int key = mFragmentPositionMap.keyAt(i);
+//                if (key == hashCode) {
+//                    String index = mFragmentPositionMap.get(key);
+//                    if (position.equals(index)) {
+//                        //位置没变依然返回POSITION_UNCHANGED
+//                        return POSITION_UNCHANGED;
+//                    } else {
+//                        //位置变了
+//                        return POSITION_NONE;
+//                    }
+//                }
+//            }
+//        }
+//        return POSITION_UNCHANGED;
+//    }
+
+    /**
+     * 将指定的Fragment替换/更新为新的Fragment
+     *
+     * @param oldFragment 旧Fragment
+     * @param newFragment 新Fragment
+     */
+    public void replaceFragment(Fragment oldFragment, Fragment newFragment) {
+        int position = mFragmentList.indexOf(oldFragment);
+        if (position == -1) {
+            return;
+        }
+        //从Transaction移除旧的Fragment
+        removeFragmentInternal(oldFragment);
+        //替换List中对应的Fragment
+        mFragmentList.set(position, newFragment);
+        //刷新Adapter
+        notifyItemChanged();
+    }
+
+    /**
+     * 将指定位置的Fragment替换/更新为新的Fragment，同{@link #replaceFragment(Fragment oldFragment, Fragment newFragment)}
+     *
+     * @param position    旧Fragment的位置
+     * @param newFragment 新Fragment
+     */
+    public void replaceFragment(int position, Fragment newFragment) {
+        Fragment oldFragment = mFragmentList.get(position);
+        removeFragmentInternal(oldFragment);
+        mFragmentList.set(position, newFragment);
+        notifyItemChanged();
+    }
+
+    /**
+     * 移除指定的Fragment
+     *
+     * @param fragment 目标Fragment
+     */
+    public void removeFragment(Fragment fragment) {
+        //先从List中移除
+        mFragmentList.remove(fragment);
+        //然后从Transaction移除
+        removeFragmentInternal(fragment);
+        //最后刷新Adapter
+        notifyItemChanged();
+    }
+
+    /**
+     * 移除指定位置的Fragment，同 {@link #removeFragment(Fragment fragment)}
+     *
+     * @param position
+     */
+    public void removeFragment(int position) {
+        Fragment fragment = mFragmentList.get(position);
+        //然后从List中移除
+        mFragmentList.remove(fragment);
+        //先从Transaction移除
+        removeFragmentInternal(fragment);
+        //最后刷新Adapter
+        notifyItemChanged();
+    }
+
+    /**
+     * 添加Fragment
+     *
+     * @param fragment 目标Fragment
+     */
+    public void addFragment(Fragment fragment) {
+        mFragmentList.add(fragment);
+        notifyItemChanged();
+    }
+
+    /**
+     * 在指定位置插入一个Fragment
+     *
+     * @param position 插入位置
+     * @param fragment 目标Fragment
+     */
+    public void insertFragment(int position, Fragment fragment) {
+        mFragmentList.add(position, fragment);
+        notifyItemChanged();
+    }
+
+    private void notifyItemChanged() {
+        //刷新之前重新收集位置信息
+        setFragmentPositionMapForUpdate();
+        notifyDataSetChanged();
+        setFragmentPositionMap();
+    }
+
+    /**
+     * 从Transaction移除Fragment
+     *
+     * @param fragment 目标Fragment
+     */
+    private void removeFragmentInternal(Fragment fragment) {
+        FragmentTransaction transaction = mFragmentManager.beginTransaction();
+        transaction.remove(fragment);
+        transaction.commitNow();
+    }
+
+    @NonNull
+    @Override
+    public Fragment createFragment(int position) {
+        return mFragmentList.get(position);
+    }
+
+//    @Override
+//    public Fragment getItem(int position) {
+//        return mFragmentList.get(position);
+//    }
+//
+//    @Override
+//    public int getCount() {
+//        return mFragmentList.size();
+//    }
+
+    /**
+     * 此方法不用position做返回值即可破解fragment tag异常的错误
+     */
+    @Override
+    public long getItemId(int position) {
+        // 获取当前数据的hashCode，其实这里不用hashCode用自定义的可以关联当前Item对象的唯一值也可以，只要不是直接返回position
+        return mFragmentList.get(position).hashCode();
+    }
+
+    @Override
+    public int getItemCount() {
+        return mFragmentList.size();
+    }
+
+    public List<Fragment> getFragments() {
+        return mFragmentList;
+    }
+}