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
你可以用这个:
PackageManager pm = getApplicationContext().getPackageManager();
List<ResolveInfo> activityList = pm.queryIntentActivities(shareIntent, 0);
for (final ResolveInfo app : activityList)
{
if ((app.activityInfo.name).contains("facebook"))
{
// facebook
}
if ((app.activityInfo.name).contains("android.gm"))
{
// gmail
}
if ((app.activityInfo.name).contains("mms"))
{
// android messaging app
}
if ((app.activityInfo.name).contains("com.android.bluetooth"))
{
// android bluetooth
}
}
其他回答
要获得所有已安装的应用程序，您可以使用包管理器
List<PackageInfo> apps = getPackageManager().getInstalledPackages(0);
要运行一个应用程序，你可以使用它的包名
Intent launchApp = getPackageManager().getLaunchIntentForPackage(“package name”)
startActivity(launchApp);
欲了解更多细节，请阅读这个博客http://codebucket.co.in/android-get-list-of-all-installed-apps/
获取已安装的非系统应用程序列表
public static void installedApps()
{
List<PackageInfo> packList = getPackageManager().getInstalledPackages(0);
for (int i=0; i < packList.size(); i++)
{
PackageInfo packInfo = packList.get(i);
if ( (packInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0)
{
String appName = packInfo.applicationInfo.loadLabel(getPackageManager()).toString();
Log.e("App № " + Integer.toString(i), appName);
}
}
}
你可以用这个:
PackageManager pm = getApplicationContext().getPackageManager();
List<ResolveInfo> activityList = pm.queryIntentActivities(shareIntent, 0);
for (final ResolveInfo app : activityList)
{
if ((app.activityInfo.name).contains("facebook"))
{
// facebook
}
if ((app.activityInfo.name).contains("android.gm"))
{
// gmail
}
if ((app.activityInfo.name).contains("mms"))
{
// android messaging app
}
if ((app.activityInfo.name).contains("com.android.bluetooth"))
{
// android bluetooth
}
}
我有另一个解决方案:
ArrayList<AppInfo> myAppsToUpdate;
// How to get the system and the user apps.
public ArrayList<AppInfo> getAppsToUpdate() {
PackageManager pm = App.getContext().getPackageManager();
List<ApplicationInfo> installedApps = pm.getInstalledApplications(0);
myAppsToUpdate = new ArrayList<AppInfo>();
for (ApplicationInfo aInfo : installedApps) {
if ((aInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
// System apps
} else {
// Users apps
AppInfo appInfo = new AppInfo();
appInfo.setAppName(aInfo.loadLabel(pm).toString());
appInfo.setPackageName(aInfo.packageName);
appInfo.setLaunchActivity(pm.getLaunchIntentForPackage(aInfo.packageName).toString());
try {
PackageInfo info = pm.getPackageInfo(aInfo.packageName, 0);
appInfo.setVersionName(info.versionName.toString());
appInfo.setVersionCode("" + info.versionCode);
myAppsToUpdate.add(appInfo);
} catch (NameNotFoundException e) {
Log.e("ERROR", "we could not get the user's apps");
}
}
}
return myAppsToUpdate;
}
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)
}
}
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