Android 如何获取已安装应用程序的权限

请帮忙。。。我是android开发新手…我已经搜索了我的问题，但没有得到任何解决方案。。。 我也尝试过：

我已经获得了所有已安装应用程序的列表，所以现在我想在单击时在文本视图中显示每个应用程序的所有权限

所有已安装应用程序的列表：

public class MainActivity extends Activity {

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

    ListView userInstalledApps = (ListView)findViewById(R.id.installed_app_list);

    List<AppList> installedApps = getInstalledApps();
    AppAdapter installedAppAdapter = new AppAdapter(MainActivity.this, installedApps);
    userInstalledApps.setAdapter(installedAppAdapter);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

private List<AppList> getInstalledApps() {
    List<AppList> res = new ArrayList<AppList>();
    List<PackageInfo> packs = getPackageManager().getInstalledPackages(0);
    for (int i = 0; i < packs.size(); i++) {
        PackageInfo p = packs.get(i);
        if ((isSystemPackage(p) == false)) {
            String appName = p.applicationInfo.loadLabel(getPackageManager()).toString();
            Drawable icon = p.applicationInfo.loadIcon(getPackageManager());
            res.add(new AppList(appName, icon));
        }
    }
    return res;
}

private boolean isSystemPackage(PackageInfo pkgInfo) {
    return ((pkgInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) ? true : false;
}


}

 public class AppList {

private String name;
Drawable icon;

public AppList(String name, Drawable icon) {
    this.name = name;
    this.icon = icon;
}

public String getName() {
    return name;
}

public Drawable getIcon() {
    return icon;
}

public class AppAdapter extends BaseAdapter {

private LayoutInflater layoutInflater;
private List<AppList> listStorage;

public AppAdapter(Context context, List<AppList> customizedListView) {
    layoutInflater =(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    listStorage = customizedListView;
}

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

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

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

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

    ViewHolder listViewHolder;
    if(convertView == null){
        listViewHolder = new ViewHolder();
        convertView = layoutInflater.inflate(R.layout.installed_app_list, parent, false);

        listViewHolder.textInListView = (TextView)convertView.findViewById(R.id.list_app_name);
        listViewHolder.imageInListView = (ImageView)convertView.findViewById(R.id.app_icon);
        convertView.setTag(listViewHolder);
    }else{
        listViewHolder = (ViewHolder)convertView.getTag();
    }
    listViewHolder.textInListView.setText(listStorage.get(position).getName());
    listViewHolder.imageInListView.setImageDrawable(listStorage.get(position).getIcon());

    return convertView;
}

static class ViewHolder{

    TextView textInListView;
    ImageView imageInListView;
}
}

主要活动：

public class MainActivity extends Activity {

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

    ListView userInstalledApps = (ListView)findViewById(R.id.installed_app_list);

    List<AppList> installedApps = getInstalledApps();
    AppAdapter installedAppAdapter = new AppAdapter(MainActivity.this, installedApps);
    userInstalledApps.setAdapter(installedAppAdapter);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

private List<AppList> getInstalledApps() {
    List<AppList> res = new ArrayList<AppList>();
    List<PackageInfo> packs = getPackageManager().getInstalledPackages(0);
    for (int i = 0; i < packs.size(); i++) {
        PackageInfo p = packs.get(i);
        if ((isSystemPackage(p) == false)) {
            String appName = p.applicationInfo.loadLabel(getPackageManager()).toString();
            Drawable icon = p.applicationInfo.loadIcon(getPackageManager());
            res.add(new AppList(appName, icon));
        }
    }
    return res;
}

private boolean isSystemPackage(PackageInfo pkgInfo) {
    return ((pkgInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) ? true : false;
}


}

 public class AppList {

private String name;
Drawable icon;

public AppList(String name, Drawable icon) {
    this.name = name;
    this.icon = icon;
}

public String getName() {
    return name;
}

public Drawable getIcon() {
    return icon;
}

public class AppAdapter extends BaseAdapter {

private LayoutInflater layoutInflater;
private List<AppList> listStorage;

public AppAdapter(Context context, List<AppList> customizedListView) {
    layoutInflater =(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    listStorage = customizedListView;
}

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

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

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

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

    ViewHolder listViewHolder;
    if(convertView == null){
        listViewHolder = new ViewHolder();
        convertView = layoutInflater.inflate(R.layout.installed_app_list, parent, false);

        listViewHolder.textInListView = (TextView)convertView.findViewById(R.id.list_app_name);
        listViewHolder.imageInListView = (ImageView)convertView.findViewById(R.id.app_icon);
        convertView.setTag(listViewHolder);
    }else{
        listViewHolder = (ViewHolder)convertView.getTag();
    }
    listViewHolder.textInListView.setText(listStorage.get(position).getName());
    listViewHolder.imageInListView.setImageDrawable(listStorage.get(position).getIcon());

    return convertView;
}

static class ViewHolder{

    TextView textInListView;
    ImageView imageInListView;
}
}

}

AppAdapter:

public class MainActivity extends Activity {

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

    ListView userInstalledApps = (ListView)findViewById(R.id.installed_app_list);

    List<AppList> installedApps = getInstalledApps();
    AppAdapter installedAppAdapter = new AppAdapter(MainActivity.this, installedApps);
    userInstalledApps.setAdapter(installedAppAdapter);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

private List<AppList> getInstalledApps() {
    List<AppList> res = new ArrayList<AppList>();
    List<PackageInfo> packs = getPackageManager().getInstalledPackages(0);
    for (int i = 0; i < packs.size(); i++) {
        PackageInfo p = packs.get(i);
        if ((isSystemPackage(p) == false)) {
            String appName = p.applicationInfo.loadLabel(getPackageManager()).toString();
            Drawable icon = p.applicationInfo.loadIcon(getPackageManager());
            res.add(new AppList(appName, icon));
        }
    }
    return res;
}

private boolean isSystemPackage(PackageInfo pkgInfo) {
    return ((pkgInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) ? true : false;
}


}

 public class AppList {

private String name;
Drawable icon;

public AppList(String name, Drawable icon) {
    this.name = name;
    this.icon = icon;
}

public String getName() {
    return name;
}

public Drawable getIcon() {
    return icon;
}

public class AppAdapter extends BaseAdapter {

private LayoutInflater layoutInflater;
private List<AppList> listStorage;

public AppAdapter(Context context, List<AppList> customizedListView) {
    layoutInflater =(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    listStorage = customizedListView;
}

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

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

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

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

    ViewHolder listViewHolder;
    if(convertView == null){
        listViewHolder = new ViewHolder();
        convertView = layoutInflater.inflate(R.layout.installed_app_list, parent, false);

        listViewHolder.textInListView = (TextView)convertView.findViewById(R.id.list_app_name);
        listViewHolder.imageInListView = (ImageView)convertView.findViewById(R.id.app_icon);
        convertView.setTag(listViewHolder);
    }else{
        listViewHolder = (ViewHolder)convertView.getTag();
    }
    listViewHolder.textInListView.setText(listStorage.get(position).getName());
    listViewHolder.imageInListView.setImageDrawable(listStorage.get(position).getIcon());

    return convertView;
}

static class ViewHolder{

    TextView textInListView;
    ImageView imageInListView;
}
}

公共类AppAdapter扩展BaseAdapter{
私人停车场停车场停车场停车场停车场停车场停车场停车场停车场停车场停车场停车场停车场停车场停车场停车场停车场停车场停车场；
私有列表存储；
公共AppAdapter（上下文上下文，列表自定义ListView）{
layoutInflater=（layoutInflater）context.getSystemService（context.LAYOUT\u INFLATER\u SERVICE）；
listStorage=customizedListView；
}
@凌驾
public int getCount（）{
返回listStorage.size（）；
}
@凌驾
公共对象getItem（int位置）{
返回位置；
}
@凌驾
公共长getItemId（int位置）{
返回位置；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
视图持有者列表视图持有者；
if（convertView==null）{
listViewHolder=新的ViewHolder（）；
convertView=LayoutFlater.充气（R.layout.installed\u应用程序列表，父项，false）；
listViewHolder.textInListView=（TextView）convertView.findViewById（R.id.list\u app\u name）；
listViewHolder.imageInListView=（ImageView）convertView.findViewById（R.id.app_图标）；
setTag（listViewHolder）；
}否则{
listViewHolder=（ViewHolder）convertView.getTag（）；
}
listViewHolder.textInListView.setText（listStorage.get（position.getName（））；
listViewHolder.imageInListView.setImageDrawable（listStorage.get（position.getIcon（））；
返回视图；
}
静态类视窗夹{
TextView textInListView；
ImageView imageInListView；
}
}

活动\u main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#eceaea">

<ListView
    android:id="@+id/installed_app_list"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_alignParentTop="true"
    android:scrollbars="none" />

  </RelativeLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<ImageView
    android:id="@+id/app_icon"
    android:layout_width="48dp"
    android:layout_height="48dp"
    android:contentDescription="@string/hello_world"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_marginLeft="16dp"
    android:layout_marginTop="16dp"
    android:paddingBottom="8dp"/>

<TextView
    android:id="@+id/list_app_name"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textStyle="bold"
    android:textSize="16dp"
    android:textColor="#000000"
    android:layout_toRightOf="@+id/app_icon"
    android:layout_alignTop="@+id/app_icon"
    android:layout_marginLeft="16dp"
    android:layout_marginTop="2dp"
    android:text="@string/hello_world"/>

  </RelativeLayout>

已安装的应用程序列表.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#eceaea">

<ListView
    android:id="@+id/installed_app_list"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_alignParentTop="true"
    android:scrollbars="none" />

  </RelativeLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<ImageView
    android:id="@+id/app_icon"
    android:layout_width="48dp"
    android:layout_height="48dp"
    android:contentDescription="@string/hello_world"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_marginLeft="16dp"
    android:layout_marginTop="16dp"
    android:paddingBottom="8dp"/>

<TextView
    android:id="@+id/list_app_name"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textStyle="bold"
    android:textSize="16dp"
    android:textColor="#000000"
    android:layout_toRightOf="@+id/app_icon"
    android:layout_alignTop="@+id/app_icon"
    android:layout_marginLeft="16dp"
    android:layout_marginTop="2dp"
    android:text="@string/hello_world"/>

  </RelativeLayout>

这就是我所做的……我的意思是，我现在已经安装了所有的应用程序 希望在单击任何列出的应用程序时获得每个应用程序的权限

---

您需要检索

PackageName

以及

权限

，如下所示

PackageManager pm = getPackageManager();
List<ApplicationInfo> packages =pm.getInstalledApplications(PackageManager.GET_META_DATA);

for (ApplicationInfo applicationInfo : packages) 
{
   Log.d("test", "App: " + applicationInfo.name + " Package: " + applicationInfo.packageName);

   try 
   {
      PackageInfo packageInfo = pm.getPackageInfo(applicationInfo.packageName, PackageManager.GET_PERMISSIONS);

      //Get Permissions
      String[] requestedPermissions = packageInfo.requestedPermissions;

      if(requestedPermissions != null) 
      {
         for (int i = 0; i < requestedPermissions.length; i++) 
         {
            Log.d("test", requestedPermissions[i]);
         }
      }
   } 
   catch (NameNotFoundException e) 
   {
      e.printStackTrace();
   }
}

请用这段代码在您的

AppAdapter

类中进行更正

@Override
public AppList getItem(int position) {
    return listStorage.get(position);
}

根据需要检查使用下面的代码用此代码替换相应的代码

private List<AppList> getInstalledApps()
{
    List<AppList> res = new ArrayList<AppList>();
    List<PackageInfo> packs = getPackageManager().getInstalledPackages(0);
    for (int i = 0; i < packs.size(); i++) {
        PackageInfo p = packs.get(i);
        if ((isSystemPackage(p) == false))
        {
            String appName = p.applicationInfo.loadLabel(getPackageManager()).toString();
            Drawable icon = p.applicationInfo.loadIcon(getPackageManager());

            try {
                PackageInfo packageInfo = getPackageManager().getPackageInfo(p.applicationInfo.packageName, PackageManager.GET_PERMISSIONS);

                //Get Permissions
                String[] requestedPermissions = packageInfo.requestedPermissions;
                StringBuilder sbPermissionSt = new StringBuilder();

                if(requestedPermissions != null)
                {
                    for (int j = 0; j < requestedPermissions.length; j++)
                    {
                        Log.d("test", requestedPermissions[j]);
                        sbPermissionSt.append(requestedPermissions[j]+",");
                    }
                }

                res.add(new AppList(appName, icon, sbPermissionSt.toString()));
            }
            catch (PackageManager.NameNotFoundException nme)
            {
                nme.printStackTrace();
            }
            catch (Exception e)
            {
                e.printStackTrace();
            }
        }
    }
    return res;
}

}

将适配器设置到listview（附加侦听器）后添加此代码

userInstalledApps.setOnItemClickListener（新的AdapterView.OnItemClickListener（）{
@凌驾
public void onItemClick（AdapterView父对象、视图、整型位置、长id）
{
AppList AppList=installedAppAdapter.getItem（位置）；
String permissions=appList.getPermissions（）；
Toast.makeText（MainActivity.this，permissions，Toast.LENGTH_LONG.show（）；
}
});

您是否在清单中获得了所需的权限？不，我没有……您是否获得了安装包？@Baadsha您最好从Android的官方文档中学习权限基础知识。不要使用你不知道它是如何工作的代码。@Baadsha，你已经到了终点了……你需要在获取已安装的应用程序时获得权限，然后在

listview

item click上显示它。请检查我下面的答案。字段权限的含义是什么我要求再添加一个属性

字符串权限

到您的

AppList

类，并创建它的

setter/getter

来持有安装的应用权限，如

私有字符串名称；可绘制图标请稍微解释一下……如何根据我的应用程序实现？。。。。。。PackageManager pm=getPackageManager（）；List packages=pm.getinstalledApplication（PackageManager.GET_元数据）；对于（ApplicationInfo ApplicationInfo:packages）{….@Baadsha，我已经根据您的需要添加了代码，请使用它。使用我的getInstalledApps（）方法、类和listview项click listener。我调试了代码，代码运行良好，但onitemclick中的权限为null…我的意思是Toast只显示一个空的Toast AppList AppList=installedAppAdapter.getItem（position）；String permissions=AppList.getPermissions（）；Toast.makeText（MainActivity.this、权限、Toast.LENGTH_LONG）.show（）；