ActivityNotFoundException in Lollipop when trying

问题:

I am trying to get the permission to access app usage data using this permission. THis is only being done for Lollipop and when I start activity with this intent (android.settings.USAGE_ACCESS_SETTINGS), the app crashes (stacktrace below)

Observed that another developer noticed this issue in LG G3 phone - thread here.From user logs, I have mostly seen this occur on LG G3 and once on Samsung S5 also.

What is the right intent to launch the window for LG & Samsung S3 phone to get app usage data?

Does someone have either of these phones and can advice if this "Apps using Usage Data" permission option even exists

android.content.ActivityNotFoundException: No Activity found to handle   Intent { act=android.settings.USAGE_ACCESS_SETTINGS }
at     android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1801)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1499)
at android.app.Activity.startActivityForResult(Activity.java:3913)
at android.app.Activity.startActivityForResult(Activity.java:3860)
at     android.support.v4.app.FragmentActivity.startActivityFromFragment(FragmentActivi    ty.java:849)
at android.support.v4.app.Fragment.startActivity(Fragment.java:880)
at     com.mavdev.focusoutfacebook.fragments.addablock.apps.Fragment_appsselect_addbloc    k$2.onClick(Fragment_appsselect_addblock.java:182)
at android.view.View.performClick(View.java:5162)
at android.view.View$PerformClick.run(View.java:20873)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5834)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at      com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)

Here is my Manifest file:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="hidden"
android:installLocation="internalOnly"
android:versionCode="50"
android:versionName="2.0.5" >

<uses-sdk
    android:minSdkVersion="16"
    android:targetSdkVersion="19" />

<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.PACKAGE_USAGE_STATS" />

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>    

<uses-permission android:name="com.android.browser.permission.READ_HISTORY_BOOKMARKS" />

<uses-permission android:name="com.android.alarm.permission.SET_ALARM" />

<uses-feature
    android:glEsVersion="0x00020000"
    android:required="true" />

<application
    android:allowBackup="true"
    android:allowClearUserData="true"
    android:hardwareAccelerated="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:largeHeap="true"
    android:theme="@style/MyActionBarTheme"
    android:vmSafeMode="true" >
    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />


</application>

</manifest>

I dont have a real LG device (or even Samsung S3) with Lollipop on it to test. I am only testing in the Genymotion Emulator with Android 5.0 (API21) and it works fine.

回答1:

Does someone know how to listen to changes in that setting, with code similar or analogous to

Context context = configuration.getContext();
ContentResolver resolver = context.getContentResolver();
resolver.registerContentObserver(Settings.System.CONTENT_URI, true, observer = new TimeoutSettingContentObserver(context, new Handler()));

Here is the code:

PackageManager packageManager = getPackageManager(); 
final ApplicationInfo applicationInfo = packageManager.getApplicationInfo(getPackageName(), 0); 
appOpsManager = (AppOpsManager) getSystemService(Context.APP_OPS_SERVICE); 
appOpsManager.startWatchingMode(AppOpsManager.OPSTR_GET_USAG‌​E_STATS, 
        applicationInfo.packageName,
        new AppOpsManager.OnOpChangedListener(){ 
            @Override public void onOpChanged(String op, String packageName) {
                int mode = appOpsManager.checkOpNoThrow(op, applicationInfo.uid, packageName); 
                boolean enabled = mode == AppOpsManager.MODE_ALLOWED; 
            } 
        });

回答2:

I checked the same code on google nexus 5.0 and emulator , it works fine .It didnot show any error .Intent works fine and Apps usage acess actvity is also launched though it didnot list any apps under this .

Under settings -->security --> APPS usage -- first check your device list any apps .

Try the below code and check whether your application has usage acess enable

Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);
startActivity(intent);


try {
PackageManager packageManager = context.getPackageManager();
ApplicationInfo applicationInfo = packageManager.getApplicationInfo(context.getPackageName(), 0);
AppOpsManager appOpsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
int mode = appOpsManager.checkOpNoThrow(AppOpsManager.OPSTR_GET_USAGE_STATS, applicationInfo.uid, applicationInfo.packageName);
return (mode == AppOpsManager.MODE_ALLOWED);

} catch (PackageManager.NameNotFoundException e) {
return false;
}

And also you can refer to this link this link

回答3:

you need add activity to manifest xml like that

(under application)

<activity
       android:name="com.yournamespace.yourclassname"
       android:label="@string/app_name" >           
</activity>