本周早些时候，我问了一个类似的问题，但我仍然不明白如何获得所有已安装的应用程序的列表，然后选择一个运行。
我试过了:
Intent intent = new Intent(ACTION_MAIN);
intent.addCategory(CATEGORY_LAUNCHER);
这只显示预安装或可以运行ACTION_MAIN Intent类型的应用程序。
我也知道我可以使用PackageManager来获取所有已安装的应用程序，但我如何使用它来运行特定的应用程序呢?
当前回答
context.getPackageManager () .getInstalledApplications (PackageManager.GET_META_DATA); 应该返回所有已安装应用程序的列表，但在android 11中，它只返回系统应用程序的列表。要获得所有应用程序(系统+用户)的列表，我们需要为应用程序提供额外的权限
< uses-permission android: name = " android.permission.QUERY_ALL_PACKAGES " / >
其他回答
下面是获取Android上安装的活动/应用程序列表的代码:
Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
List<ResolveInfo> pkgAppsList = context.getPackageManager().queryIntentActivities( mainIntent, 0);
您将在ResolveInfo中获得启动应用程序所需的所有数据。你可以在这里检查ResolveInfo javadoc。
@Jas: 我没有那个代码了，但我找到了一些接近的东西。我已经做了这个来搜索我的应用程序的“组件”，它们只是具有给定类别的活动。
private List<String> getInstalledComponentList() {
Intent componentSearchIntent = new Intent();
componentSearchIntent.addCategory(Constants.COMPONENTS_INTENT_CATEGORY);
componentSearchIntent.setAction(Constants.COMPONENTS_INTENT_ACTION_DEFAULT);
List<ResolveInfo> ril = getPackageManager().queryIntentActivities(componentSearchIntent, PackageManager.MATCH_DEFAULT_ONLY);
List<String> componentList = new ArrayList<String>();
Log.d(LOG_TAG, "Search for installed components found " + ril.size() + " matches.");
for (ResolveInfo ri : ril) {
if (ri.activityInfo != null) {
componentList.add(ri.activityInfo.packageName);// + ri.activityInfo.name);
Log.d(LOG_TAG, "Found installed: " + componentList.get(componentList.size()-1));
}
}
return componentList;
}
我已经注释了它获取活动名称的部分，但它非常简单。
这个答案是正确的一个列表安装的应用程序显示和搜索功能添加。
科特林
activity_all_installed_app.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".AllInstalledAppActivity">
<TextView
android:id="@+id/totalInstalledApp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/total_Installed_Apps"
android:textStyle="bold"
android:textAlignment="center"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="vertical"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/totalInstalledApp"
tools:listitem="@layout/installed_app_layout" />
</androidx.constraintlayout.widget.ConstraintLayout>
installed_app_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_margin="4dp"
android:elevation="6dp"
android:background="?attr/selectableItemBackground">
<androidx.cardview.widget.CardView
android:id="@+id/cardview"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
app:cardCornerRadius="5dp"
app:cardUseCompatPadding="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/app_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:contentDescription="@string/todo"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/list_app_name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:text="@string/app_name"
android:textSize="16sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/app_icon"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/app_package"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:text="@string/app_package_name"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/app_icon"
app:layout_constraintTop_toBottomOf="@+id/list_app_name" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
</androidx.constraintlayout.widget.ConstraintLayout>
AppModel.kt
import android.graphics.drawable.Drawable
class AppModel(private var name:String, private var icon: Drawable, private var packages:String) {
fun getName(): String {
return name
}
fun getIcon(): Drawable {
return icon
}
fun getPackages(): String {
return packages
}
}
AppAdapter.kt
import android.app.AlertDialog
import android.content.Context
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ImageView
import android.widget.TextView
import androidx.recyclerview.widget.RecyclerView
import com.materialsouk.allcodeapp.R
import com.materialsouk.allcodeapp.models.AppModel
import java.util.ArrayList
import android.content.Intent
import android.net.Uri
import android.provider.Settings
import android.widget.Toast
class AppAdapter(private val context: Context, private var appModelList: ArrayList<AppModel>) :
RecyclerView.Adapter<AppAdapter.ViewHolder>() {
class ViewHolder(ItemView: View) : RecyclerView.ViewHolder(ItemView) {
val appNameTxt: TextView = itemView.findViewById(R.id.list_app_name)
val appPackageNameTxt: TextView = itemView.findViewById(R.id.app_package)
val appIcon: ImageView = itemView.findViewById(R.id.app_icon)
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val view: View =
LayoutInflater.from(parent.context)
.inflate(R.layout.installed_app_layout, parent, false)
return ViewHolder(view)
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
holder.appNameTxt.text = appModelList[position].getName()
holder.appIcon.setImageDrawable(appModelList[position].getIcon())
holder.appPackageNameTxt.text = appModelList[position].getPackages()
holder.itemView.setOnClickListener {
val dialogListTitle = arrayOf("Open App", "App Info")
val builder: AlertDialog.Builder = AlertDialog.Builder(context)
builder.setTitle("Choose Action")
.setItems(
dialogListTitle
) { _, which ->
when (which) {
0 -> {
val intent =
context.packageManager.getLaunchIntentForPackage(appModelList[position].getPackages())
if (intent != null) {
context.startActivity(intent)
}else{
Toast.makeText(context,"System app is not open for any reason.",Toast.LENGTH_LONG).show()
}
}
1 -> {
val intent = Intent()
intent.action = Settings.ACTION_APPLICATION_DETAILS_SETTINGS
intent.data =
Uri.parse("package:${appModelList[position].getPackages()}")
context.startActivity(intent)
}
}
}
builder.show()
}
}
override fun getItemCount(): Int {
return appModelList.size
}
}
这是菜单 search_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/app_bar_search"
android:icon="@drawable/ic_search_black_24dp"
android:title="@string/search"
app:showAsAction="ifRoom|withText"
app:actionViewClass="androidx.appcompat.widget.SearchView"/>
</menu>
AllInstalledAppActivity.kt
import android.annotation.SuppressLint
import android.app.Dialog
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.recyclerview.widget.RecyclerView
import com.materialsouk.allcodeapp.models.AppModel
import android.content.pm.PackageInfo
import android.content.pm.ApplicationInfo
import android.os.Handler
import android.os.Looper
import android.view.Menu
import android.widget.LinearLayout
import android.widget.TextView
import androidx.appcompat.widget.SearchView
import com.materialsouk.allcodeapp.adapters.AppAdapter
import java.util.*
import kotlin.collections.ArrayList
class AllInstalledAppActivity : AppCompatActivity() {
private lateinit var recyclerView: RecyclerView
private lateinit var installedAppsList: ArrayList<AppModel>
private lateinit var installedAppAdapter: AppAdapter
@SuppressLint("SetTextI18n")
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_all_installed_app)
recyclerView = findViewById(R.id.recycler_view)
val loadingDialog = Dialog(this)
loadingDialog.setContentView(R.layout.loading)
loadingDialog.window!!.setLayout(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT
)
loadingDialog.setCancelable(false)
installedAppsList = ArrayList()
loadingDialog.show()
Handler(Looper.getMainLooper()).postDelayed({
getInstalledApps()
loadingDialog.dismiss()
findViewById<TextView>(R.id.totalInstalledApp).text =
"${getString(R.string.total_Installed_Apps)} ${installedAppsList.size}"
installedAppAdapter = AppAdapter(this, installedAppsList)
recyclerView.adapter = installedAppAdapter
}, 500)
}
@SuppressLint("QueryPermissionsNeeded")
private fun getInstalledApps(): ArrayList<AppModel> {
installedAppsList.clear()
val packs = packageManager.getInstalledPackages(0)
for (i in packs.indices) {
val p = packs[i]
if (!isSystemPackage(p)) {
val appName = p.applicationInfo.loadLabel(packageManager).toString()
val icon = p.applicationInfo.loadIcon(packageManager)
val packages = p.applicationInfo.packageName
installedAppsList.add(AppModel(appName, icon, packages))
}
}
installedAppsList.sortBy { it.getName().capitalized() }
return installedAppsList
}
private fun String.capitalized(): String {
return this.replaceFirstChar {
if (it.isLowerCase())
it.titlecase(Locale.getDefault())
else it.toString()
}
}
private fun isSystemPackage(pkgInfo: PackageInfo): Boolean {
return pkgInfo.applicationInfo.flags and ApplicationInfo.FLAG_SYSTEM != 0
}
override fun onCreateOptionsMenu(menu: Menu): Boolean {
menuInflater.inflate(R.menu.search_menu, menu)
val search = menu.findItem(R.id.app_bar_search)
val searchView = search.actionView as SearchView
searchView.maxWidth = android.R.attr.width
searchView.queryHint = "Search app name or package"
searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
override fun onQueryTextSubmit(query: String?): Boolean {
return false
}
@SuppressLint("NotifyDataSetChanged")
override fun onQueryTextChange(newText: String?): Boolean {
val appModelArrayList: ArrayList<AppModel> = ArrayList()
for (i in installedAppsList) {
if (i.getName().lowercase(Locale.getDefault()).contains(
newText!!.lowercase(
Locale.getDefault()
)
)
||
i.getPackages().lowercase(Locale.getDefault()).contains(
newText.lowercase(
Locale.getDefault()
)
)
) {
appModelArrayList.add(i)
}
}
installedAppAdapter =
AppAdapter(this@AllInstalledAppActivity, appModelArrayList)
recyclerView.adapter = installedAppAdapter
installedAppAdapter.notifyDataSetChanged()
return true
}
})
return super.onCreateOptionsMenu(menu)
}
}
如果在一个包中有多个启动器，上述代码就有问题。例如:在LG Optimus Facebook为LG, MySpace为LG, Twitter为LG包含在一个包的名称SNS，如果你使用上述SNS将重复。经过几个小时的研究，我得到了以下代码。看起来效果不错。
private List<String> getInstalledComponentList()
throws NameNotFoundException {
final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
List<ResolveInfo> ril = getPackageManager().queryIntentActivities(mainIntent, 0);
List<String> componentList = new ArrayList<String>();
String name = null;
for (ResolveInfo ri : ril) {
if (ri.activityInfo != null) {
Resources res = getPackageManager().getResourcesForApplication(ri.activityInfo.applicationInfo);
if (ri.activityInfo.labelRes != 0) {
name = res.getString(ri.activityInfo.labelRes);
} else {
name = ri.activityInfo.applicationInfo.loadLabel(
getPackageManager()).toString();
}
componentList.add(name);
}
}
return componentList;
}
自Android 11 (API级别30)以来，大多数用户安装的应用默认是不可见的。你必须静态地声明哪些应用程序和/或意图过滤器你将在你的manifest中获得信息，就像这样:
<manifest>
<queries>
<!-- Explicit apps you know in advance about: -->
<package android:name="com.example.this.app"/>
<package android:name="com.example.this.other.app"/>
<!-- Intent filter signatures that you are going to query: -->
<intent>
<action android:name="android.intent.action.SEND" />
<data android:mimeType="image/jpeg" />
</intent>
</queries>
...
</manifest>
或者要求QUERY_ALL_PACKAGES权限。
在做了上面的事情之后，这里的其他答案仍然适用。
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