我正在尝试从Google Play安装应用。我可以理解,在打开Google Play商店网址时,它会打开Google Play,当我按下后退按钮时,活动会恢复。
Intent marketIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(appURL));
marketIntent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
startActivity(marketIntent);
当我回到活动时,我尝试调用此onResume()
来检查应用是否已安装,但收到错误:
@Override
protected void onResume() {
super.onResume();
boolean installed = false;
while (!installed) {
installed = appInstalledOrNot(APPPACKAGE);
if (installed) {
Toast.makeText(this, "App installed", Toast.LENGTH_SHORT).show();
}
}
}
private boolean appInstalledOrNot(String uri) {
PackageManager pm = getPackageManager();
boolean app_installed = false;
try {
pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
app_installed = true;
}
catch (PackageManager.NameNotFoundException e) {
app_installed = false;
}
return app_installed ;
}
错误如下:
E / AndroidRuntime(796):java.lang.RuntimeException:无法启动 活动 ComponentInfo {com.example.appinstaller / com.example.appinstaller.MainActivity}: android.content.ActivityNotFoundException: 找不到活动来处理Intent {act = android.intent.action.VIEW dat = market:// details?id = com.package.name flg = 0x40080000}
我猜活动是onPause()
。有没有更好的方法来实现它?我正在尝试检查应用是否已完成安装。
答案 0 :(得分:246)
试试这个:
private boolean isPackageInstalled(String packageName, PackageManager packageManager) {
boolean found = true;
try {
packageManager.getPackageInfo(packageName, 0);
} catch (PackageManager.NameNotFoundException e) {
found = false;
}
return found;
}
它尝试获取有关您传入其名称的包的信息。如果失败,如果抛出NameNotFoundException
,则表示没有安装具有该名称的包,因此我们返回false
。
请注意,我们传入了PackageManager
而不是Context
,因此该方法可以更灵活地使用,并且不会违反law of Demeter。只要您拥有Context
实例,就可以使用该方法无法访问PackageManager
实例。
像这样使用:
public void someMethod() {
// ...
PackageManager pm = context.getPackageManager();
boolean isInstalled = isPackageInstalled("com.somepackage.name", pm);
// ...
}
答案 1 :(得分:17)
Robin Kanters的答案是正确的,但它确实检查已安装的应用程序,无论其启用或禁用状态如何。
我们都知道一个应用程序可以安装但是被用户禁用,因此无法使用。
这会检查已安装的 AND 启用的应用:
public static boolean isPackageInstalled(String packageName, PackageManager packageManager) {
try {
return packageManager.getApplicationInfo(packageName, 0).enabled;
}
catch (PackageManager.NameNotFoundException e) {
return false;
}
}
您可以将此方法放在Utils
之类的类中,并使用以下方法将其调用到处:
boolean isInstalled = Utils.isPackageInstalled("com.package.name", context.getPackageManager())
答案 2 :(得分:7)
从Android 11(API级别30)开始,默认情况下大多数用户安装的应用程序都不可见。在清单中,您必须静态声明要获取有关信息的应用程序,如下所示:
<manifest>
<queries>
<!-- Explicit apps you know in advance about: -->
<package android:name="com.example.this.app"/>
<package android:name="com.example.this.other.app"/>
</queries>
...
</manifest>
然后,@ RobinKanters的answer起作用:
private boolean isPackageInstalled(String packageName, PackageManager packageManager) {
try {
packageManager.getPackageInfo(packageName, 0);
return true;
} catch (PackageManager.NameNotFoundException e) {
return false;
}
}
// ...
// This will return true on Android 11 if the app is installed,
// since we declared it above in the manifest.
isPackageInstalled("com.example.this.app", pm);
// This will return false on Android 11 even if the app is installed:
isPackageInstalled("another.random.app", pm);
在此处了解更多信息:
答案 3 :(得分:5)
试试这个:
public static boolean isAvailable(Context ctx, Intent intent) {
final PackageManager mgr = ctx.getPackageManager();
List<ResolveInfo> list = mgr.queryIntentActivities(intent,PackageManager.MATCH_DEFAULT_ONLY);
return list.size() > 0;
}
答案 4 :(得分:4)
更快的解决方案:
private boolean isPackageInstalled(String packagename, PackageManager packageManager) {
try {
packageManager.getPackageGids(packagename);
return true;
} catch (NameNotFoundException e) {
return false;
}
}
getPackageGids
从getPackageInfo
开始便宜,因此效果更快。
Run 10000 on API 15
Exists pkg:
getPackageInfo: nanoTime = 930000000
getPackageGids: nanoTime = 350000000
Not exists pkg:
getPackageInfo: nanoTime = 420000000
getPackageGids: nanoTime = 380000000
Run 10000 on API 17
Exists pkg:
getPackageInfo: nanoTime = 2942745517
getPackageGids: nanoTime = 2443716170
Not exists pkg:
getPackageInfo: nanoTime = 2467565849
getPackageGids: nanoTime = 2479833890
Run 10000 on API 22
Exists pkg:
getPackageInfo: nanoTime = 4596551615
getPackageGids: nanoTime = 1864970154
Not exists pkg:
getPackageInfo: nanoTime = 3830033616
getPackageGids: nanoTime = 3789230769
Run 10000 on API 25
Exists pkg:
getPackageInfo: nanoTime = 3436647394
getPackageGids: nanoTime = 2876970397
Not exists pkg:
getPackageInfo: nanoTime = 3252946114
getPackageGids: nanoTime = 3117544269
注意:这在某些虚拟空间中不起作用。他们可以违反Android API并始终返回一个数组,即使没有该软件包名称的应用程序
在这种情况下,请使用getPackageInfo
。
答案 5 :(得分:0)
private boolean isAppExist() {
PackageManager pm = getPackageManager();
try {
PackageInfo info = pm.getPackageInfo("com.facebook.katana", PackageManager.GET_META_DATA);
} catch (PackageManager.NameNotFoundException e) {
return false;
}
return true;
}
if (isFacebookExist()) {showToast(" Facebook is install.");}
else {showToast(" Facebook is not install.");}
答案 6 :(得分:0)
isFakeGPSInstalled = Utils.isPackageInstalled(Utils.PACKAGE_ID_FAKE_GPS, this.getPackageManager());
//检查安装的软件包是否正确的方法
public static boolean isPackageInstalled(String packageName, PackageManager packageManager) {
boolean found = true;
try {
packageManager.getPackageInfo(packageName, 0);
} catch (PackageManager.NameNotFoundException e) {
found = false;
}
return found;
}
答案 7 :(得分:0)
如果您想在没有try catch块的情况下进行尝试,可以使用以下方法, 创建一个意图并设置您要验证的应用程序的包
val intent = Intent(Intent.ACTION_VIEW)
intent.data = uri
intent.setPackage("com.example.packageofapp")
并调用以下方法检查应用程序是否已安装
fun isInstalled(intent:Intent) :Boolean{
val list = context.packageManager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY)
return list.isNotEmpty()
}
答案 8 :(得分:0)
正在寻找Kotlin解决方案的人可以使用此方法,
在这里,我共享了完整的代码,并且还处理了启用状态。 Check If Application is Installed in Android Kotlin
fun isAppInstalled(packageName: String, context: Context): Boolean {
return try {
val packageManager = context.packageManager
packageManager.getPackageInfo(packageName, 0)
true
} catch (e: PackageManager.NameNotFoundException) {
false
}
}
答案 9 :(得分:0)
您可以在Kotlin extentions.kt
中使用它
fun Context.isPackageInstalled(packageName: String): Boolean {
return try {
packageManager.getPackageInfo(packageName, 0)
true
} catch (e: PackageManager.NameNotFoundException) {
false
}
}
用法
context.isPackageInstalled("com.somepackage.name")
答案 10 :(得分:-8)
getDuration