How to pull List of installed App name, package na

问题:

I'm trying to figure out how i can implement this code into my existing source code. Currently i have some source that displays a list-view of all the installed apps and on-click will send intent to the application. I'm needing some support on how to pull the icon and add this into the list view.

Any help, source code editing, links, etc would help me resolve this.

Thank you

ListInstalledActivitiesActivity

public class ListInstalledActivitiesActivity extends ListActivity {

    // Buffer used to store package and class information, and also determine the number of installed activities
    private ArrayList<String[]> _activitiesBuffer = null;

    // Buffers for package and class information
    private String[] _packages = null;
    private String[] _classes = null;

    // Index used to fill buffers
    private int _index = 0;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main3);
        // Get all installed activities (package and class information for every activity)
        getAllInstalledActivities();              

        // Set content to GUI
        setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, _classes));

        ListView lv = getListView();
        lv.setTextFilterEnabled(true);

        // Add listener
        lv.setOnItemClickListener(new OnItemClickListener() {

            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                // When clicked, show a toast with the selected activity
                Toast.makeText(
                    getApplicationContext(), 
                    ((TextView) view).getText(), 
                    Toast.LENGTH_SHORT).show();

                // When clicked, start selected activity, if allowed or possible
                try {

                    Intent intent = new Intent().setClassName(
                            _packages[position], // package 
                            _classes[position]); // class
                    startActivity(intent);

                } catch (Exception e) {
                    Toast.makeText(getApplicationContext(), "Unable to start selected application.", Toast.LENGTH_SHORT);
                }

          } // public void onItemClick(AdapterView<?> parent, View view, int position, long id)

        });

    } // public void onCreate(Bundle savedInstanceState)

    /*
     * Get all installed activities
     */
    private void getAllInstalledActivities() {


        // Initialize activities buffer
        _activitiesBuffer = new ArrayList<String[]>();

        final Intent intent = new Intent(Intent.ACTION_MAIN, null);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        final List<ResolveInfo> pkgAppsList = getPackageManager().queryIntentActivities( intent, 0);

        Iterator<ResolveInfo> iterator1 = pkgAppsList.iterator();
        while (iterator1.hasNext()) {

            ResolveInfo resolveInfo = iterator1.next();

            String[] buf = new String[] {
                    resolveInfo.activityInfo.packageName, 
                    resolveInfo.activityInfo.name};

            _activitiesBuffer.add(buf);

        } // while (iterator1.hasNext())

        _packages = new String[_activitiesBuffer.size()];
        _classes = new String[_activitiesBuffer.size()];

        Iterator<String[]> iterator2 = _activitiesBuffer.iterator();
        while (iterator2.hasNext()) {

            String[] buf = iterator2.next();

            // Store package information
            _packages[_index] = buf[0]; 

            // Store class information
            _classes[_index] = buf[1];

            _index++;

        } // while (iterator2.hasNext())

    } // private void getAllInstalledActivities()

      }

main3.xml

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:orientation="vertical" >

     <ListView
         android:id="@+id/android:list"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent" />

      <!-- <ImageView -->
      <!--android:id="@+id/ImageView02" -->
      <!--android:layout_width="fill_parent" -->
      <!--android:layout_height="wrap_content" -->
      <!--android:layout_marginBottom="10dp" -->
      <!--android:paddingBottom="5dp" -->


      </LinearLayout>

回答1:

To fetch the names and icons of the installed applications, you need to use Package Manager class, here is a snippet of code, that will let you fetch application's name and icons

   import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class FetchApplicationsActivity extends Activity {

    TextView data;
    ImageView image1;
    LinearLayout holdlayout;
    View l1;
    private ArrayList results;
    List<ResolveInfo> list;
    TextView result;
    String str = "";
    Drawable icon;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        l1 = findViewById(R.id.Layout1);
        results = new ArrayList();
        PackageManager pm = this.getPackageManager();
        Intent intent = new Intent(Intent.ACTION_MAIN, null);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        list = pm.queryIntentActivities(intent,
                PackageManager.PERMISSION_GRANTED);
        for (ResolveInfo rInfo : list) {
            str = rInfo.activityInfo.applicationInfo.loadLabel(pm).toString()
                    + "\n";
            results.add(rInfo.activityInfo.applicationInfo.loadLabel(pm)
                    .toString());
            Log.w("Installed Applications", rInfo.activityInfo.applicationInfo
                    .loadLabel(pm).toString());
            icon = rInfo.activityInfo.applicationInfo.loadIcon(pm);
            holdlayout = new LinearLayout(getApplicationContext());
            holdlayout.setOrientation(LinearLayout.HORIZONTAL);
            data = new TextView(getApplicationContext());
            data.setText(str);
            image1 = new ImageView(getApplicationContext());
            image1.setBackgroundDrawable(icon);
            ((ViewGroup) holdlayout).addView(image1);
            ((ViewGroup) holdlayout).addView(data);
            ((ViewGroup) l1).addView(holdlayout);

        }
    }
}

Edit- You can define your main.xml as,

?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >



    <ScrollView
        android:id="@+id/scrollView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >


        <LinearLayout
        android:id="@+id/Layout1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >



    </LinearLayout>
    </ScrollView>

</LinearLayout>

Here I have created dynamic textviews, Imageviews and layouts to show the names and icons. You can create your own customized list to show this.

Edit2- Here is a good link on how to create customized list and also look here. I think these will solve the issue.

回答2:

I follow this tutorial and its very helpful to me:

Get installed Applications with Name, Package Name, Version and Icon

class PInfo {
    private String appname = "";
    private String pname = "";
    private String versionName = "";
    private int versionCode = 0;
    private Drawable icon;
    private void prettyPrint() {
        Log.v(appname + "\t" + pname + "\t" + versionName + "\t" + versionCode);
    }
}

private ArrayList<PInfo> getPackages() {
    ArrayList<PInfo> apps = getInstalledApps(false); /* false = no system packages */
    final int max = apps.size();
    for (int i=0; i<max; i++) {
        apps.get(i).prettyPrint();
    }
    return apps;
}

private ArrayList<PInfo> getInstalledApps(boolean getSysPackages) {
    ArrayList<PInfo> res = new ArrayList<PInfo>();        
    List<PackageInfo> packs = getPackageManager().getInstalledPackages(0);
    for(int i=0;i<packs.size();i++) {
        PackageInfo p = packs.get(i);
        if ((!getSysPackages) && (p.versionName == null)) {
            continue ;
        }
        PInfo newInfo = new PInfo();
        newInfo.appname = p.applicationInfo.loadLabel(getPackageManager()).toString();
        newInfo.pname = p.packageName;
        newInfo.versionName = p.versionName;
        newInfo.versionCode = p.versionCode;
        newInfo.icon = p.applicationInfo.loadIcon(getPackageManager());
        res.add(newInfo);
    }
    return res; 
}