【Android】获取手机中已安装apk文件信息(PackageInfo、ResolveInfo)(应用图片、应用 ...

众所周知，通过PackageManager可以获取手机端已安装的apk文件的信息，具体代码如下：

PackageManager packageManager = this.getPackageManager();
List<PackageInfo> packageInfoList = packageManager.getInstalledPackages(0);

 

/**
 * 查询手机内非系统应用
 * @param context
 * @return
 */
public static List<PackageInfo> getAllApps(Context context) {
List<PackageInfo> apps = new ArrayList<PackageInfo>();
PackageManager pManager = context.getPackageManager();
//获取手机内所有应用
List<PackageInfo> paklist = pManager.getInstalledPackages(0);
for (int i = 0; i < paklist.size(); i++) {
PackageInfo pak = (PackageInfo) paklist.get(i);
//判断是否为非系统预装的应用程序
if ((pak.applicationInfo.flags & pak.applicationInfo.FLAG_SYSTEM) <= 0) {
// customs applications
apps.add(pak);
}
}
return apps;
}
获取图片、应用名、包名:
                    PackageManager pManager = MessageSendActivity.this.getPackageManager();
                    List<PackageInfo> appList  = Utils.getAllApps(MessageSendActivity.this);
                    for(int i=0;i<appList.size();i++) {
                    PackageInfo pinfo = appList.get(i);
                    ShareItemInfo shareItem = new ShareItemInfo();
                    //set Icon
                    shareItem.setIcon(pManager.getApplicationIcon(pinfo.applicationInfo));
                    //set Application Name
                    shareItem.setLabel(pManager.getApplicationLabel(pinfo.applicationInfo).toString());
                    //set Package Name
                    shareItem.setPackageName(pinfo.applicationInfo.packageName);
                    }

获取支持分享的应用的代码：

/**
 * 查询手机内所有支持分享的应用
 * @param context
 * @return
 */
public static List<ResolveInfo> getShareApps(Context context){
    List<ResolveInfo> mApps = new ArrayList<ResolveInfo>();
    Intent intent=new Intent(Intent.ACTION_SEND,null);
    intent.addCategory(Intent.CATEGORY_DEFAULT);
    intent.setType("text/plain");
    PackageManager pManager = context.getPackageManager();
    mApps = pManager.queryIntentActivities(intent,PackageManager.COMPONENT_ENABLED_STATE_DEFAULT);
    return mApps;
}
//由于该方法，返回的并不是 PackageInfo 对象。而是 ResolveInfo。因此获取图片、应用名、包名的方法不一样，如下：
                    PackageManager pManager = MessageSendActivity.this.getPackageManager();
                    /*********************查询手机内所有支持分享的应用*********************/
                    List<ResolveInfo> resolveList  = Utils.getShareApps(MessageSendActivity.this);
                    for(int i=0;i<resolveList.size();i++) {
                    ResolveInfo resolve = resolveList.get(i);
                    ShareItemInfo shareItem = new ShareItemInfo();
                    //set Icon
                    shareItem.setIcon(resolve.loadIcon(pManager));
                    //set Application Name
                    shareItem.setLabel(resolve.loadLabel(pManager).toString());
                    //set Package Name
                    shareItem.setPackageName(resolve.activityInfo.packageName);
                    }

总结：
通过 PackageInfo  获取具体信息方法：
包名获取方法：packageInfo.packageName
icon获取获取方法：packageManager.getApplicationIcon(applicationInfo)
应用名称获取方法：packageManager.getApplicationLabel(applicationInfo)
使用权限获取方法：packageManager.getPackageInfo(packageName,PackageManager.GET_PERMISSIONS)
.requestedPermissions
通过 ResolveInfo 获取具体信息方法：
包名获取方法：resolve.activityInfo.packageName
icon获取获取方法：resolve.loadIcon(packageManager)
应用名称获取方法：resolve.loadLabel(packageManager).toString()