Android获取本地所有应用

这里写了一个demo，获取手机本地所有应用，加载图标和名字，并且可以点击打开该应用，无需任何权限。

效果如下：

应用实体类AppInfo:

data class AppInfo(val pkg: String, val icon: Int, val name: String, val intent: Intent)

NativeAppProvider类用于获取本地应用，根据当前targetsdk版本分为6.0以上和以下分别加载本地应用：

public class NativeAppProvider {

    public static List<AppInfo> checkInstallApps(Context context) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
            return checkInstallAppsBeforeL(context);
        } else {
            return checkInstallAppsAfterL(context);
        }
    }

    private static List<AppInfo> checkInstallAppsBeforeL(Context context) {
        List<AppInfo> apps = new ArrayList<>();
        PackageManager pm = context.getPackageManager();
        try {
            List<PackageInfo> packageInfos = pm.getInstalledPackages(0);
            for (int i = 0; i < packageInfos.size(); i++) {
                PackageInfo pkgInfo = packageInfos.get(i);
                ApplicationInfo appInfo = pkgInfo.applicationInfo;
                if (TextUtils.equals(context.getPackageName(), pkgInfo.packageName)) continue;
                Intent intent = getLaunchIntent(pm, pkgInfo.packageName);
                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED | Intent.FLAG_ACTIVITY_CLEAR_TOP);
                AppInfo app = new AppInfo(pkgInfo.packageName, appInfo.icon, appInfo.loadLabel(pm).toString(), intent);
                apps.add(app);
            }
        } catch (Exception e) {
            //
        }
        return apps;
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    private static List<AppInfo> checkInstallAppsAfterL(Context context) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) return null;
        LauncherApps launcherApps = (LauncherApps) context.getSystemService(Context.LAUNCHER_APPS_SERVICE);
        if (launcherApps == null) return null;
        List<AppInfo> apps = new ArrayList<>();
        try {
            List<LauncherActivityInfo> activityInfos = launcherApps.getActivityList(null, Process.myUserHandle());
            for (LauncherActivityInfo activityInfo : activityInfos) {
                ApplicationInfo appInfo = activityInfo.getApplicationInfo();
                Intent intent = new Intent(Intent.ACTION_MAIN);
                intent.addCategory(Intent.CATEGORY_LAUNCHER);
                intent.setPackage(appInfo.packageName);
                intent.setComponent(activityInfo.getComponentName());
                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED | Intent.FLAG_ACTIVITY_CLEAR_TOP);
                AppInfo app = new AppInfo(appInfo.packageName, appInfo.icon, activityInfo.getLabel().toString(), intent);
                apps.add(app);
            }
        } catch (Exception e) {
        }
        return apps;
    }

    private static Intent getLaunchIntent(PackageManager pm, String pkg) {
        Intent intent = pm.getLaunchIntentForPackage(pkg);
        if (intent != null) {
            return intent;
        } else {
            intent = new Intent(Intent.ACTION_MAIN);
            intent.addCategory(Intent.CATEGORY_LAUNCHER);
            intent.setPackage(pkg);
            List<ResolveInfo> apps = pm.queryIntentActivities(intent, 0);
            if (apps == null || apps.isEmpty()) {
                return null;
            }
            ResolveInfo ri = apps.iterator().next();
            if (ri == null) {
                return null;
            }
            intent.setComponent(new ComponentName(pkg, ri.activityInfo.name));
            return intent;
        }
    }
}

调用获取本地应用：

val installedApps = NativeAppProvider.checkInstallApps(applicationContext)

这里是adapter代码，点击item通过intent跳转应用：

class AppAdapter(val context: Context): RecyclerView.Adapter<AppAdapter.AppViewHolder>() {
    private var datas = ArrayList<AppInfo>()

    fun setDatas(datas: ArrayList<AppInfo>) {
        this.datas = datas
        notifyDataSetChanged()
    }

    class AppViewHolder(itemView: View): ViewHolder(itemView) {
        var ivIcon: ImageView?= null
        var tvName: TextView?= null

        init {
            ivIcon = itemView.findViewById(R.id.iv_icon)
            tvName = itemView.findViewById(R.id.tv_name)
        }
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AppViewHolder {
        return AppViewHolder(LayoutInflater.from(context).inflate(R.layout.item, parent, false))
    }

    override fun onBindViewHolder(holder: AppViewHolder, position: Int) {
        holder.ivIcon?.background = context.packageManager.getActivityIcon(datas[position].intent)
        holder.tvName?.text = datas[position].name

        holder.itemView.setOnClickListener {
            context.startActivity(datas[position].intent)
        }
    }

    override fun getItemCount(): Int {
        return datas.size
    }
}