ソートのアプリ一覧のAndroidのJava

Question

私はInstalledAppsAdapter

import android.content.Context; 
import android.content.Intent; 
import android.graphics.drawable.Drawable; 
import android.support.v7.widget.CardView; 
import android.support.v7.widget.RecyclerView; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ImageView; 
import android.widget.TextView; 
import android.widget.Toast; 

import java.util.List; 

public class InstalledAppsAdapter extends RecyclerView.Adapter<InstalledAppsAdapter.ViewHolder> { 

    private Context mContext; 
    private List<String> mDataSet; 

    public InstalledAppsAdapter(Context context, List<String> list){ 
     mContext = context; 
     mDataSet = list; 
    } 

    public static class ViewHolder extends RecyclerView.ViewHolder{ 
     public CardView mCardView; 
     public TextView mTextViewLabel; 
     public TextView mTextViewPackage; 
     public ImageView mImageViewIcon; 

     public ViewHolder (View v){ 
      super(v); 
      // Get the widgets reference from custom layout 
      mCardView = (CardView) v.findViewById(R.id.card_view); 
      mTextViewLabel = (TextView) v.findViewById(R.id.app_label); 
      mTextViewPackage = (TextView) v.findViewById(R.id.app_package); 
      mImageViewIcon = (ImageView) v.findViewById(R.id.iv_icon); 
     } 
    } 

    @Override 
    public InstalledAppsAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType){ 
     View v = LayoutInflater.from(mContext).inflate(R.layout.apps_list,parent,false); 
     ViewHolder vh = new ViewHolder(v); 
     return vh; 
    } 

    @Override 
    public void onBindViewHolder(ViewHolder holder, int position){ 
     // Initialize a new instance of AppManager class 
     AppsManager appsManager = new AppsManager(mContext); 

     // Get the current package name 
     final String packageName = (String) mDataSet.get(position); 

     // Get the current app icon 
     Drawable icon = appsManager.getAppIconByPackageName(packageName); 

     // Get the current app label 
     String label = appsManager.getApplicationLabelByPackageName(packageName); 

     // Set the current app label 
     holder.mTextViewLabel.setText(label); 

     // Set the current app package name 
     holder.mTextViewPackage.setText(packageName); 

     // Set the current app icon 
     holder.mImageViewIcon.setImageDrawable(icon); 

     // Set a click listener for CardView 
     holder.mCardView.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       // Get the intent to launch the specified application 
       Intent intent = mContext.getPackageManager().getLaunchIntentForPackage(packageName); 
       if(intent != null){ 
        mContext.startActivity(intent); 
       }else { 
        Toast.makeText(mContext,packageName + " Launch Error.", Toast.LENGTH_SHORT).show(); 
       } 
      } 
     }); 
    } 

    @Override 
    public int getItemCount(){ 
     // Count the installed apps 
     return mDataSet.size(); 
    } 

} 

とAppsManager

import android.content.Context; 
import android.content.Intent; 
import android.content.pm.ActivityInfo; 
import android.content.pm.ApplicationInfo; 
import android.content.pm.PackageManager; 
import android.content.pm.ResolveInfo; 
import android.graphics.drawable.Drawable; 
import android.support.v4.content.ContextCompat; 

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


public class AppsManager { 
    private Context mContext; 

    public AppsManager(Context context){ 
     mContext = context; 
    } 

    // Get a list of installed app 
    public List<String> getInstalledPackages(){ 
     // Initialize a new Intent which action is main 
     Intent intent = new Intent(Intent.ACTION_MAIN,null); 

     // Set the newly created intent category to launcher 
     intent.addCategory(Intent.CATEGORY_LAUNCHER); 

     // Set the intent flags 
     intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED); 

     // Generate a list of ResolveInfo object based on intent filter 
     List<ResolveInfo> resolveInfoList = mContext.getPackageManager().queryIntentActivities(intent,0); 

     // Initialize a new ArrayList for holding non system package names 
     List<String> packageNames = new ArrayList<>(); 

     // Loop through the ResolveInfo list 
     for(ResolveInfo resolveInfo : resolveInfoList){ 
      // Get the ActivityInfo from current ResolveInfo 
      ActivityInfo activityInfo = resolveInfo.activityInfo; 

      // If this is not a system app package 
      if(!isSystemPackage(resolveInfo)){ 
       // Add the non system package to the list 
       packageNames.add(activityInfo.applicationInfo.packageName); 
      } 
     } 

     return packageNames; 

    } 

    // Custom method to determine an app is system app 
    public boolean isSystemPackage(ResolveInfo resolveInfo){ 
     return ((resolveInfo.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0); 
    } 

    // Custom method to get application icon by package name 
    public Drawable getAppIconByPackageName(String packageName){ 
     Drawable icon; 
     try{ 
      icon = mContext.getPackageManager().getApplicationIcon(packageName); 
     }catch (PackageManager.NameNotFoundException e){ 
      e.printStackTrace(); 
      // Get a default icon 
      icon = ContextCompat.getDrawable(mContext,R.mipmap.ic_apps); 
     } 
     return icon; 
    } 

    // Custom method to get application label by package name 
    public String getApplicationLabelByPackageName(String packageName){ 
     PackageManager packageManager = mContext.getPackageManager(); 
     ApplicationInfo applicationInfo; 
     String label = "Unknown"; 
     try { 
      applicationInfo = packageManager.getApplicationInfo(packageName, 0); 
      if(applicationInfo!=null){ 
       label = (String)packageManager.getApplicationLabel(applicationInfo); 
      } 

     }catch (PackageManager.NameNotFoundException e) { 
      e.printStackTrace(); 
     } 
     return label; 
    } 
} 

を持っている私はそれを行うことができる方法、パッケージ名とアプリ名でアダプターをしませソートしたいですか？

私はちょうどあなたのInstalledAppsAdapterがApplicationInfoではなく、に裏打ちされた場合は、オフに良いだろう、パッケージ名

Answer 1

大丈夫、みんなソートするホルダーやBLAのBLAシンプルなものをいじった後AppsManager.java

Collections.sort(resolveInfoList, new ResolveInfo.DisplayNameComparator(pm)); 

でこの

は私の更新を参照してください@AndroidBeginnerJhon

Answer 2

上の方法ではない昇順アプリケーション名とアプリケーションのリストをソートしたいこのよう

mLayoutManager = new LinearLayoutManager(mContext); // new GridLayoutManager(mContext,2); 
mRecyclerView.setLayoutManager(mLayoutManager); 

// Initialize a new adapter for RecyclerView 
mAdapter = new InstalledAppsAdapter(
     mContext, 
     new AppsManager(mContext).getInstalledPackages() 
); 

// Set the adapter for RecyclerView 
mRecyclerView.setAdapter(mAdapter); 

アダプタを設定しますString（アプリパッケージ名）その後、ApplicationInfo#loadLabel()に基づいてソートさComparator<ApplicationInfo>を作成することができます。

final PackageManager pm = mContext.getPackageManager(); 
mAdapter.sort(new Comparator<ApplicationInfo>() { 
    @Override 
    public int compare(ApplicationInfo lhs, ApplicationInfo rhs) { 
     final String lhsLabel = lhs.loadLabel(pm).toString(); 
     final String rhsLabel = rhs.loadLabel(pm).toString(); 
     return String.CASE_INSENSITIVE_ORDER.compare(lhsLabel, rhsLabel); 
    } 
}); 

あなたはgetInstalledPackagesがList<ApplicationInfo>ではなくList<String>を返すことになるでしょう。アダプタのmDataSetにも同様にList<ApplicationInfo>を使用する必要があります。