Android仿知乎分享

使用 BottomSheetDialog 实现仿知乎分享控件

1. 首先获取手机内所有支持分享的应用，得到 ResolveInfo 对象，利用反射获取应用图标等信息
2. 然后用 RecyclerView 的 GridLayoutManager 网格布局展示，自己实现点击事件就可以了
   
   下面来一张图看的更加直观些
3. 
   首先获取手机内支持分享的这些应用封装为Util类：

   /**
    * 获取手机内所有支持分享的应用列表
    */
   public static ArrayList getShareAppList(Context context, Intent intent) {
       ArrayList shareAppInfos = new ArrayList<>();
       PackageManager packageManager = context.getPackageManager();
       List resolveInfos = getShareApps(context, intent);
       if (null == resolveInfos) {
           return null;
       } else {
           for (ResolveInfo resolveInfo : resolveInfos) {
               AppInfo appInfo = new AppInfo();
               appInfo.setPkgName(resolveInfo.activityInfo.packageName);
               appInfo.setLaunchClassName(resolveInfo.activityInfo.name);
               appInfo.setAppName(resolveInfo.loadLabel(packageManager).toString());
               appInfo.setAppIcon(resolveInfo.loadIcon(packageManager));
               shareAppInfos.add(appInfo);
           }
       }
       return shareAppInfos;
   }
   /**
    * 查询手机内所有支持分享的应用列表
    */
   public static List getShareApps(Context context, Intent intent) {
       List resolveInfoList;
       PackageManager pm = context.getPackageManager();
       resolveInfoList = pm.queryIntentActivities(intent, PackageManager.COMPONENT_ENABLED_STATE_DEFAULT);
       // 按名称排序
       ResolveInfo.DisplayNameComparator comparator = new ResolveInfo.DisplayNameComparator(pm);
       Collections.sort(resolveInfoList, comparator);
       return resolveInfoList;
   }

   接下来就是打开activity的按钮展示分享的应用列表了：

   private ArrayList mAppinfoList;
   private AppInfoAdapter mAdapter;
   private RecyclerView mRecyclerView;
   private Intent shareIntent;
   {
       shareIntent = new Intent(Intent.ACTION_SEND);
       shareIntent.setType("text/plain");
       shareIntent.putExtra(Intent.EXTRA_TEXT, "www.baidu.com");
   }
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       initView();
   }
   @Override
   protected void onStart() {
       super.onStart();
       mAppinfoList = Utils.getShareAppList(this, shareIntent);
   }
   private void initView() {
       Button btn = findViewById(R.id.btn);
       btn.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View v) {
             showDialog();
           }
       });
   }
   private void showDialog() {
       BottomSheetDialog mBottomSheetDialog = new BottomSheetDialog(this);
       mBottomSheetDialog.setContentView(R.layout.dialog_bottom_sheet);
       initBottomDialog(mBottomSheetDialog);
       mBottomSheetDialog.show();
   }
   
   private void initBottomDialog(final Dialog dialog) {
       mAdapter = new AppInfoAdapter(this, mAppinfoList);
       mRecyclerView = dialog.findViewById(R.id.list_view);
       mRecyclerView.setLayoutManager(new GridLayoutManager(this, 4));
       mRecyclerView.setAdapter(mAdapter);
       mAdapter.setOnItemClickLitener(new AppInfoAdapter.OnItemClickLitener() {
           @Override
           public void onItemClick(AppInfo appInfo, View view, int position) {
               Intent intent = new Intent(Intent.ACTION_SEND);
               intent.setComponent(new ComponentName(appInfo.getPkgName(), appInfo.getLaunchClassName()));
               intent.setType("text/plain");
               intent.putExtra(Intent.EXTRA_TEXT, "www.baidu.com");
               startActivity(intent);
           }
           @Override
           public void onItemLongClick(AppInfo appInfo, View view, int position) {
               // 打开应用信息界面
               Intent intent = new Intent();
               intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
               intent.setData(Uri.parse("package:" + appInfo.getPkgName()));
               startActivity(intent);
           }
       });
   }

   这样到此就结束了，可以实现自定义仿知乎分享的需求，以下链接是完整代码，需要的可以点击下载  https://download.csdn.net/download/lou_liang/10691605