如何創建一個包含兩列的列表視圖，顯示所有已安裝的android應用及其權限？

Question

我是Android開發的新手（已滿2天）。

我打算創建一個應用程序，列出該設備中當前安裝的所有應用程序，並在每個結果旁邊的一列中顯示所授予的權限。 我知道通常listView包含1列，如何創建另一列？

我也願意接受其他想法（例如，當我單擊已安裝的應用程序名稱時，可能還有其他意圖？）

下面是到目前為止我的代碼，其中顯示了所有已安裝的應用程序：

import android.app.Activity;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextSwitcher;
import android.widget.TextView;

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


public class PopAnalysis extends Activity{
    ListView appList;
    private TextSwitcher mSwitcher;
    TextView myText;
    private ArrayList results = new ArrayList();
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.popupanalysis);
        appList = (ListView)findViewById(R.id.listViewApp);
        PackageManager pm = this.getPackageManager();
        Intent intent = new Intent(Intent.ACTION_MAIN,null);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        ArrayList<ResolveInfo> list = (ArrayList<ResolveInfo>) pm.queryIntentActivities(intent, PackageManager.PERMISSION_GRANTED);
        for (ResolveInfo rInfo : list) {
            results.add(rInfo.activityInfo.applicationInfo.loadLabel(pm).toString());
            System.out.println(rInfo.activityInfo.applicationInfo.loadLabel(pm).toString());
        }
        appList.setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1, results));
        appList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                int itemposition = position;
                String value = (String) appList.getItemAtPosition(position);

            }
        });
    }
}

以下是我的XML代碼：

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



     <ListView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/listViewApp"
            android:layout_alignParentTop="true"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:layout_marginTop="56dp" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:text="Large Text"
            android:id="@+id/textViewAnalysis"
            android:layout_alignParentTop="true"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true" />
        <TextView
            android:id="@+id/list_item_appname"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="2"
            android:textAppearance="@android:style/TextAppearance.Medium" />

        <TextView
            android:id="@+id/list_item_apppermissions"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1" />
    </RelativeLayout>

Answer 1

首先，您需要加載每個應用程序的應用程序列表和權限。 我在Activity.onCreate里面做以簡化示例。 在AsyncTask中執行此操作的更好方法

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final PackageManager packageManager = getPackageManager();

        final List<Pair<String, List<String>>> appsWithPermission = new ArrayList<>();

        final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
        final List<ResolveInfo> apps = packageManager.queryIntentActivities(mainIntent, 0);
        for (ResolveInfo info : apps) {
            final ApplicationInfo applicationInfo = info.activityInfo.applicationInfo;
            final String appName = (String) applicationInfo.loadLabel(packageManager);

            final List<String> permissions = new ArrayList<>();

            if (appName != null) {

                try {
                    final PackageInfo packageInfo = packageManager.getPackageInfo(applicationInfo.packageName, PackageManager.GET_PERMISSIONS);
                    final String[] requestedPermissions = packageInfo.requestedPermissions;

                    if (requestedPermissions != null) {
                        permissions.addAll(Arrays.asList(requestedPermissions));
                    }

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

            appsWithPermission.add(new Pair<>(appName, permissions));
        }

        final ListView listView = (ListView) findViewById(R.id.list_view);
        final AppsAdapter appsAdapter = new AppsAdapter(this, appsWithPermission);
        listView.setAdapter(appsAdapter);
    }
}

其次，您需要xml布局list_item.xml

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

    <TextView
        android:id="@+id/list_item_appname"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="2"
        android:textAppearance="@android:style/TextAppearance.Medium" />

    <TextView
        android:id="@+id/list_item_apppermissions"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1" />

</LinearLayout>

最后是AppsAdapter.java

public class AppsAdapter extends BaseAdapter {

    private final Context mContext;
    private List<Pair<String, List<String>>> mAppsWithPermission;

    public AppsAdapter(Context context, List<Pair<String, List<String>>> appsWithPermission) {
        mContext = context;
        mAppsWithPermission = appsWithPermission;
    }

    static class ViewHolder {
        public TextView appName;
        public TextView appPermissions;
    }

    @Override
    public int getCount() {
        return mAppsWithPermission.size();
    }

    @Override
    public Object getItem(int position) {
        return mAppsWithPermission.get(position);
    }

    @Override
    public long getItemId(int position) {
        return mAppsWithPermission.get(position).hashCode();
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;

        if (convertView == null) {

            convertView = LayoutInflater.from(mContext).inflate(R.layout.list_item, parent, false);
            holder = new ViewHolder();
            holder.appName = (TextView) convertView.findViewById(R.id.list_item_appname);
            holder.appPermissions = (TextView) convertView.findViewById(R.id.list_item_apppermissions);

            convertView.setTag(holder);

        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        Pair<String, List<String>> item = mAppsWithPermission.get(position);

        holder.appName.setText(item.first);
        holder.appPermissions.setText(item.second.toString());

        return convertView;
    }
}

Answer 2

我看到您已經弄清楚了如何獲取所有已安裝應用程序及其各自權限的列表，這很好。 但是，為了使ListView具有多列，您將需要實現ListViewAdapter。

在這里可以找到一個非常好的資源來弄清楚如何做到這一點 。

如果您對該鏈接上的任何內容感到困惑或不起作用，請告訴我。

碼：

PopAnalysis.java

public class PopAnalysis extends Activity {
    public static final String FIRST_COLUMN = "First";
    public static final String SECOND_COLUMN = "Second";

    ListView appList;
    private TextSwitcher mSwitcher;
    TextView myText;
    private ArrayList results = new ArrayList();
    private ArrayList<HashMap<String, String>> list;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.popupanalysis);

        appList = (ListView)findViewById(R.id.listViewApp);
        HashMap<String,String> t1 = new HashMap<String, String>();
        t1.put(FIRST_COLUMN, "App 1");
        t1.put(SECOND_COLUMN, "Permission 1");
        list.add(t1);

        ListViewAdapter adapter = new ListViewAdapter(this, list);
        listView.setAdapter(adapter);
    }
}

ListViewAdapter.java

public class ListViewAdapter extends BaseAdapter {
    public static final String FIRST_COLUMN = "First";
    public static final String SECOND_COLUMN = "Second";

    public ArrayList<HashMap<String, String>> list;
    Activity activity;
    TextView txtFirst;
    TextView txtSecond;


    public ListViewAdapter(Activity activity,ArrayList<HashMap<String, String>> list){
        super();
        this.activity=activity;
        this.list=list;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }



    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater=activity.getLayoutInflater();

        if(convertView == null){

            convertView=inflater.inflate(R.layout.column_row_layout, null);

            txtFirst=(TextView) convertView.findViewById(R.id.application);
            txtSecond=(TextView) convertView.findViewById(R.id.permissions);

        }

        HashMap<String, String> map=list.get(position);
        txtFirst.setText(map.get(FIRST_COLUMN));
        txtSecond.setText(map.get(SECOND_COLUMN));

        return convertView;
    }
}

column_row_layout.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent">
    <TextView android:id="@+id/application"
        android:layout_height="wrap_content"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:textStyle="bold" />
    <TextView android:id="@+id/permissions"
        android:layout_height="wrap_content"
        android:layout_width="0dp"
        android:layout_weight="1"/>
</LinearLayout>

在PopAnalysis.java中，我僅添加了一個條目以簡單地展示它是如何完成的。 當然，將所需數據實現到其中應該沒有任何問題。

Answer 3

除了2列listview外，您還可以嘗試ExpandableListView。 單擊該項目，然后展開其下方的詳細視圖。 詳細信息視圖將包含該應用程序的權限。

展開式Listview教程

順便說一句，SDK的列表視圖中無法有多個列。 您可以做的是擁有一個偽多列列表視圖，例如在同一行中使用多個textview（或其他類型的視圖）。 在這種情況下，您將需要為列表視圖和自定義行布局文件創建一個自定義適配器。

如果您確實想要多列內容，則只有第三方庫或TableLayout是您的唯一選擇。

TableLayout教程

Answer 4

要創建兩列listview，必須實現自定義listview。 請閱讀此鏈接

在program_list.xml中而不是imageview中使用textview可以解決您的問題。