The Java implementation retrieves the packages installed on the android device

In this article, I'm going to show you how to get the apps that are already installed on Android phones. All right

private String getInstalledAppListAsString(){
    PackageManager pm = context.getPackageManager();
    List<ApplicationInfo> apps = pm.getInstalledApplications(PackageManager.GET_GIDS);
    StringBuffer stringBuffer = new StringBuffer();
    for (ApplicationInfo app : apps) {
      if(pm.getLaunchIntentForPackage(app.packageName) != null) {
        // apps with launcher intent
        if((app.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) == 1) {
          // updated system apps
 
        } else if ((app.flags & ApplicationInfo.FLAG_SYSTEM) == 1) {
          // system apps
 
        } else {
          // user installed apps
          stringBuffer.append(app.packageName).append(';');
        }
      }
    }
    return stringBuffer.toString();
  }

Now, how do we get the information about each application

package cn.lyz.mobilesafe.domain;

import android.graphics.drawable.Drawable;


public class AppInfo {
	//icon
	private Drawable app_icon;
	//The application name
	private String app_name;
	//Application version number
	private String app_version;
	//The name of packages
	private String packagename;
	//Is it the user app?
	private boolean isUserApp;
	
	
	public AppInfo() {
		super();
		// TODO Auto-generated constructor stub
	}
	public AppInfo(Drawable app_icon, String app_name, String app_version,
			String packagename) {
		super();
		this.app_icon = app_icon;
		this.app_name = app_name;
		this.app_version = app_version;
		this.packagename = packagename;
	}
	
	
	public AppInfo(Drawable app_icon, String app_name, String app_version,
			String packagename, boolean isUserApp) {
		super();
		this.app_icon = app_icon;
		this.app_name = app_name;
		this.app_version = app_version;
		this.packagename = packagename;
		this.isUserApp = isUserApp;
	}
	public Drawable getApp_icon() {
		return app_icon;
	}
	public void setApp_icon(Drawable app_icon) {
		this.app_icon = app_icon;
	}
	public String getApp_name() {
		return app_name;
	}
	public void setApp_name(String app_name) {
		this.app_name = app_name;
	}
	public String getApp_version() {
		return app_version;
	}
	public void setApp_version(String app_version) {
		this.app_version = app_version;
	}
	public String getPackagename() {
		return packagename;
	}
	public void setPackagename(String packagename) {
		this.packagename = packagename;
	}
	
	public boolean isUserApp() {
		return isUserApp;
	}
	public void setUserApp(boolean isUserApp) {
		this.isUserApp = isUserApp;
	}
	
	@Override
	public String toString() {
		return "AppInfo [app_icon=" + app_icon + ", app_name=" + app_name
				+ ", app_version=" + app_version + ", packagename="
				+ packagename + ", isUserApp=" + isUserApp + "]";
	}
}