Android gets all the application list information and jumps to the specified app

First, you need to add the following permissions to the manifest list

<uses-permission
      android:name="android.permission.QUERY_ALL_PACKAGES"
      tools:ignore="QueryAllPackagesPermission" />

public class AppUtil {
    //获取到所有的包名并检查是否有指定包名
    @SuppressLint("QueryPermissionsNeeded")
    public  static  boolean isAppInstalled(Context context, String packageName){
        //应用信息列表
        List<ResolveInfo> apps = new ArrayList<>();
        Intent intent = new Intent(Intent.ACTION_MAIN, null);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        //获取到设备上安装的所有应用信息
        apps = context.getPackageManager().queryIntentActivities(intent, 0);
        for (int i = 0; i < apps.size(); i++) {
            ResolveInfo info = apps.get(i);
            //包名
            String pname = info.activityInfo.packageName;
            //主activity信息
            CharSequence cls = info.activityInfo.name;
            //app名字
            CharSequence appname = info.activityInfo.loadLabel(context.getPackageManager());
            Log.e("Unity","应用信息: appname = "+appname+" packageName = "+pname+" Activity = "+cls);
            if(pname.equals(packageName)){
                return true;
            }
        }
        return false;
    }
    //通过包名跳转到该app
    public static void JumpToActivity(Context context, String packageName, String className) {
        Intent intent = new Intent();
        intent.setClassName(packageName, className);
        context.startActivity(intent);
    }
}

How to use

public void JumpToApp(String pageName,String activityName){
        if(!AppUtil.isAppInstalled(this,pageName)){
            TToast.show(this,"应用不存在，请确认已安装该应用");
            return;
        }
        TToast.show(this,"应用存在");
        AppUtil.JumpToActivity(UnityPlayerActivity.this, pageName,activityName);
    }

The result is as follows:

 The jump I wrote before is problematic. When I jump from one app to another, I didn’t create a task stack, so another app will run on the task stack of the current app, which will cause display problems and will jump The conversion code is modified as follows

//通过包名跳转到该app
public static void JumpToActivity(String packageName, String className, Activity curactivity) {
    ComponentName componetName = new ComponentName(packageName,className);
    Intent intent= new Intent();
    intent.setComponent(componetName);
    //创建一个任务栈
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    curactivity.startActivity(intent);
}

The complete code is as follows

package com.unity3d.player.tools;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ResolveInfo;
import android.util.Log;

import java.util.ArrayList;
import java.util.List;

public class AppUtil {
    //获取到所有的包名并检查是否有指定包名
    @SuppressLint("QueryPermissionsNeeded")
    public  static  boolean isAppInstalled(Context context, String packageName){
        //应用信息列表
        List<ResolveInfo> apps = new ArrayList<>();
        Intent intent = new Intent(Intent.ACTION_MAIN, null);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        //获取到设备上安装的所有应用信息
        apps = context.getPackageManager().queryIntentActivities(intent, 0);
        for (int i = 0; i < apps.size(); i++) {
            ResolveInfo info = apps.get(i);
            //包名
            String pname = info.activityInfo.packageName;
            //主activity信息
            CharSequence cls = info.activityInfo.name;
            //app名字
            CharSequence appname = info.activityInfo.loadLabel(context.getPackageManager());
            Log.e("Unity","应用信息: appname = "+appname+" packageName = "+pname+" Activity = "+cls);
            if(pname.equals(packageName)){
                return true;
            }
        }
        return false;
    }
    //通过包名跳转到该app
    public static void JumpToActivity(String packageName, String className, Activity curactivity) {
        ComponentName componetName = new ComponentName(packageName,className);
        Intent intent= new Intent();
        intent.setComponent(componetName);
        //创建一个任务栈
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        curactivity.startActivity(intent);
    }
}