I searched this and found many solutions but none of them works for me .
I want to start new activity from another package. I use this
Intent myIntent = new Intent(this,my_class.class);
startActivityForResult(myIntent ,6161);
it gives this error:
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.xx.yy.pack/com.xx.yy.pack.my_class}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2305)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2363)
at android.app.ActivityThread.access$900(ActivityThread.java:161)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1265)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5356)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at java.io.File.fixSlashes(File.java:185)
at java.io.File.<init>(File.java:134)
at com.wub.cropimage.CropImage.a(Unknown Source)
at com.wub.cropimage.CropImage.onCreate(Unknown Source)
at android.app.Activity.performCreate(Activity.java:5426)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2269)
... 11 more
my manifest is here:
<activity
android:name="com.xx.yy.pack.my_class" >
<intent-filter>
<action android:name="myintent.intent.action.Launch" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
thanks in advance
Just do this
Intent myIntent = new Intent(this,my_class.class);
startActivity(myIntent);
Do this in your AndroidManifest.xml
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="Activity1"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="com.example.Activity2"></activity>
</application>
Note:- Activity1 is your first activity and Activity2 is your second activity
May this help you
To call an activity from another package (application):
Intent myIntent = new Intent(Intent.ACTION_MAIN);
PackageManager manager = getApplicationContext().getPackageManager();
myIntent = manager.getLaunchIntentForPackage(YourPackageName);
myIntent.addCategory(Intent.CATEGORY_LAUNCHER);
startActivityForResult(myIntent ,6161);
Related
I am using BottomNavigation Menu in my app which has 4 submenus: Address, Dashboard, Home, Notifications.
When I want to startActivity from HomeFragment to Dashboard Fragment it gives me error that I have depicted below.
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.karatasyazilim.su, PID: 21216
android.content.ActivityNotFoundException: Unable to find explicit activity class {com.karatasyazilim.su/androidx.fragment.app.FragmentActivity}; have you declared this activity in your AndroidManifest.xml?
at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:2069)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1717)
at android.app.Activity.startActivityForResult(Activity.java:5252)
at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:675)
at androidx.core.app.ActivityCompat.startActivityForResult(ActivityCompat.java:234)
at androidx.fragment.app.FragmentActivity.startActivityFromFragment(FragmentActivity.java:790)
at androidx.fragment.app.FragmentActivity$HostCallbacks.onStartActivityFromFragment(FragmentActivity.java:932)
at androidx.fragment.app.Fragment.startActivity(Fragment.java:1257)
at androidx.fragment.app.Fragment.startActivity(Fragment.java:1245)
at com.karatasyazilim.su.ui.home.HomeFragment$5.onClick(HomeFragment.java:333)
at android.view.View.performClick(View.java:7869)
at android.widget.TextView.performClick(TextView.java:14958)
at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:992)
at android.view.View.performClickInternal(View.java:7838)
at android.view.View.access$3600(View.java:886)
at android.view.View$PerformClick.run(View.java:29362)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:237)
at android.app.ActivityThread.main(ActivityThread.java:8016)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:496)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1087)
My manifest is :
<?xml version="1.0" encoding="utf-8"?>
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.Su">
<activity android:name=".CreateAddress"></activity>
<activity android:name=".PhoneActivation" />
<activity
android:name=".Genel"
android:label="#string/title_activity_genel" />
<activity android:name=".SignUp" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data
android:name="com.facebook.sdk.ApplicationId"
android:value="#string/facebook_app_id" />
<activity
android:name="com.facebook.FacebookActivity"
android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
android:label="#string/app_name" />
<activity
android:name="com.facebook.CustomTabActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="#string/fb_login_protocol_scheme" />
</intent-filter>
</activity>
</application>
And here is my activiy code.
Intent kalimera = new Intent(getActivity(), FragmentActivity.class);
startActivity(kalimera);
What am I doing wrong?
You're trying to start the androidx FragmentActivity class directly. This is a parent class that you should subclass to create your own Activity.
Instead, make sure that you're using the name of the Activity you want to launch instead:
Intent intent = new Intent(getActivity(), NameOfTheActivityThatYouWantToLaunch.class);
startActivity(intent);
Alternately, if you aren't trying to launch an Activity and just got this code from somewhere, simply remove those lines.
If you're trying to launch a Fragment instead, take a look at How to start Fragment from an Activity
i made a new activity and when i im trying to move between them by clicking a button the app crash and logcat shows the error below
12-16 14:02:09.016 23235-23235/com.modather.scalculate E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.modather.scalculate, PID: 23235
android.content.ActivityNotFoundException: Unable to find explicit activity class {com.modather.scalculate/android.support.v7.widget.AppCompatButton}; have you declared this activity in your AndroidManifest.xml?
at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java)
at android.app.Instrumentation.execStartActivity(Instrumentation.java)
at android.app.Activity.startActivityForResult(Activity.java)
at android.support.v4.app.BaseFragmentActivityApi16.startActivityForResult(BaseFragmentActivityApi16.java:54)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:67)
at android.app.Activity.startActivityForResult(Activity.java)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:720)
at android.app.Activity.startActivity(Activity.java)
at android.app.Activity.startActivity(Activity.java)
at com.modather.scalculate.HomePage$onCreate$1.onClick(HomePage.kt:36)
at android.view.View.performClick(View.java)
at android.view.View$PerformClick.run(View.java)
at android.os.Handler.handleCallback(Handler.java)
at android.os.Handler.dispatchMessage(Handler.java)
at android.os.Looper.loop(Looper.java)
at android.app.ActivityThread.main(ActivityThread.java)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:107)
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".HomePage"
android:label="#string/app_name"
android:theme="#style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.modather.scalculate.age"
android:label="Calculate my age(SC)" />
</application>
i had searched over stackoverflow and found some solution but it didn't work for me.. so if it possible to fix mine ?
Here's the moving code
fab.setOnClickListener {
val intent = Intent(this, activity_age::class.java)
startActivity(intent)
}
There is Typing mistake check it
your activity name is activity_age and you have added in manifest age is
fab.setOnClickListener {
val intent = Intent(this,age::class.java)
startActivity(intent)
}
please my app crashes whenever i click the navigation item to start activity. i Have tried all the solutions from similar questions in the last 6 hours to no avail. that includes registering the activity in manifest, changing intent (this,menu_profile.class); to (mainactivity.this, menu_profile.class); to `(getApplicationContext(), menu_profile.class);. googling permission (13) error to brought no solution.
snippet
else if (itemId == R.id.third) {
Intent intent = new Intent(getApplicationContext(), Menu_Profile.class);
startActivity(intent);
}
manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.majesty.adesanmi.viewpager_nav">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".Menu_Profile"
android:label="DestinationActivity"/>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</application>
</manifest>
Logcat error
06-16 09:46:56.913 2889-2889/? E/Trace: error opening trace file: Permission denied (13)
06-16 09:46:56.983 2889-2889/com.majesty.adesanmi.viewpager_nav E/dalvikvm: Could not find class 'android.graphics.drawable.RippleDrawable', referenced from method android.support.v7.widget.AppCompatImageHelper.hasOverlappingRendering
06-16 09:47:41.673 2889-2889/com.majesty.adesanmi.viewpager_nav E/AndroidRuntime: FATAL EXCEPTION: main
android.content.ActivityNotFoundException: Unable to find explicit activity class {com.majesty.adesanmi.viewpager_nav/com.majesty.adesanmi.viewpager_nav.Menu_About}; have you declared this activity in your AndroidManifest.xml?
at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1541)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1416)
at android.app.Activity.startActivityForResult(Activity.java:3351)
at android.support.v4.app.BaseFragmentActivityJB.startActivityForResult(BaseFragmentActivityJB.java:50)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:79)
at android.app.Activity.startActivityForResult(Activity.java:3312)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:859)
at android.app.Activity.startActivity(Activity.java:3522)
at android.app.Activity.startActivity(Activity.java:3490)
at com.majesty.adesanmi.viewpager_nav.MainActivity$2.onNavigationItemSelected(MainActivity.java:157)
at android.support.design.widget.NavigationView$1.onMenuItemSelected(NavigationView.java:156)
at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:822)
at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:156)
at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:969)
at android.support.design.internal.NavigationMenuPresenter$1.onClick(NavigationMenuPresenter.java:342)
at android.view.View.performClick(View.java:4084)
at android.view.View$PerformClick.run(View.java:16966)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
just remove intent filter from your menu profilr activity this from your Manifist file or replace this
<?xml version="1.0" encoding="utf-8"?>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".Menu_Profile"
android:label="DestinationActivity"/>
</application>
I have a Application in that I want to add QR reader as a Activity/Module
So,I followed this to Read QR code..
and Here Its working fine..
So I have added this code to My application and I want to use this activity for that I have designed a new activity in that On-click it should start Qr reader..
But I am getting this error...
Here I Tried with this
Button b = (Button) findViewById(R.id.main);
b.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(Qdata.this,DecoderActivity.class);
startActivity(i);
}
Here DecoderActivity.calass is northig But another application or activity which is Qr reader form the above example so I want to Include this in my activity....
This at Manifest
<activity
android:name=".adata.Qdata"
android:label="#string/app_name" >
<intent-filter>
<action android:name="com.my.adata.Qdata" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".adata.DecoderActivity"
android:label="#string/app_name"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="com.my.adata.DecoderActivity" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
Actually here adata is a another package in my Application... and Main package is com.my
So in com.my I have another files for QR purpose I have separated this two activities
This is Error
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.my/com.my.adata.DecoderActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1970)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1995)
at android.app.ActivityThread.access$600(ActivityThread.java:128)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1161)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4517)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.support.v7.widget.ToolbarWidgetWrapper.<init>(ToolbarWidgetWrapper.java:98)
at android.support.v7.widget.ToolbarWidgetWrapper.<init>(ToolbarWidgetWrapper.java:91)
at android.support.v7.app.ToolbarActionBar.<init>(ToolbarActionBar.java:73)
at android.support.v7.app.AppCompatDelegateImplV7.setSupportActionBar(AppCompatDelegateImplV7.java:205)
at android.support.v7.app.AppCompatActivity.setSupportActionBar(AppCompatActivity.java:99)
at com.my.adata.DecoderActivity.onCreate(DecoderActivity.java:43)
at android.app.Activity.performCreate(Activity.java:4470)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1053)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1934)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1995)
at android.app.ActivityThread.access$600(ActivityThread.java:128)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1161)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4517)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760)
at dalvik.system.NativeStart.main(Native Method)
Can any one suggest me what is problem...
Why are you using two launcher activity try to make one louncher activity and than call your activity.
<activity
android:name=".adata.Main"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.my.adata.Qdata">
</activity>
Do this changes in manifest...
<activity
android:name="com.my.adata.Main"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER">
</intent-filter>
</activity>
<activity
android:name="com.my.adata.Qdata"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="com.my.adata.Qdata" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
I got the stack trace below in the Android developer account. There is just one occurrence of this error.
java.lang.RuntimeException: Unable to instantiate application com.mysite.myapp.TestApplication: java.lang.ClassNotFoundException: com.mysite.myapp.TestApplication in loader dalvik.system.PathClassLoader[/data/app-private/com.mysite.myapp-2.apk]
at android.app.LoadedApk.makeApplication(LoadedApk.java:466)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:3268)
at android.app.ActivityThread.access$2200(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:973)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3691)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:670)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: com.myapp.myapp.TestApplication in loader dalvik.system.PathClassLoader[/data/app-private/com.mysite.myapp-2.apk]
at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at android.app.Instrumentation.newApplication(Instrumentation.java:945)
at android.app.LoadedApk.makeApplication(LoadedApk.java:461)
... 11 more
In my manifest file, I have declared com.mysite.myapp.TestApplication.
My Manifest file looks like this:
<application
android:name="com.mysite.myapp.TestApplication"
android:icon="#drawable/app_icon"
android:label="#string/app_name"
android:theme="#style/Theme.myapp" >
<activity
android:name="com.mysite.myapp.ActivityDashboard"
android:configChanges="orientation|keyboard"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
...
If your main home page is ActivityDashboard.java
insert as below or if TestApplication.java
replace .ActivityDashboard as .TestApplication in the activity tag
<package name="com.mysite.myapp"
<application
android:name="TestApplication"
android:icon="#drawable/app_icon"
android:label="#string/app_name"
android:theme="#style/Theme.myapp" >
<activity android:name=".ActivityDashboard" android:configChanges="orientation|keyboard"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
......
</application>
android:name="com.mysite.myapp.ActivityDashboard"
Replace thr above in your manifest with the below.
android:name=".ActivityDashboard"
Alternatively:
android:name="com.mysite.myapp.TestApplication.ActivityDashboard"