android-activity

问题 What i have here is a simple webview activity that when loaded it auto displays an ongoing notification. The idea is that people can navigate away from this activity and quickly access it again from any screen they want by pulling down the drop down menu and selecting it. Then when they want they can just close the notification by hitting the menu button and hitting exit and then the notification clears. This all works fine. However, when the notification is pressed it starts a new instance

问题 I'm working on an application and I need to make it possible to launch an activity in a separate history and stack as you can see in the photo that the application of the telephone starts the activity to make calls that works independently and even this can be observed when I want See recent apps. 回答1: In the Manifest file for your application In the <activity> element Add an attribute: android:process=". ProcessName " This will cause that particular activity to be launched in a new process.

问题 I'm trying to make a little view in Android Studio that can drag it from right to left. This view will have 2 buttons. And when you select one of them or press outside of it, the small menu will hide again. I have been searching and I have not got any library that does something similar. I also have no idea how to do it. I can draw the small view in a separate view (layout xml) but I don't know how to add it and create the events to be opened or closed by dragging. How can I do this? Thanks.

问题 I'm trying to make a little view in Android Studio that can drag it from right to left. This view will have 2 buttons. And when you select one of them or press outside of it, the small menu will hide again. I have been searching and I have not got any library that does something similar. I also have no idea how to do it. I can draw the small view in a separate view (layout xml) but I don't know how to add it and create the events to be opened or closed by dragging. How can I do this? Thanks.

问题 I'm trying to make a little view in Android Studio that can drag it from right to left. This view will have 2 buttons. And when you select one of them or press outside of it, the small menu will hide again. I have been searching and I have not got any library that does something similar. I also have no idea how to do it. I can draw the small view in a separate view (layout xml) but I don't know how to add it and create the events to be opened or closed by dragging. How can I do this? Thanks.

问题 I have two activities & i want to call a method clear from B. I tried like this and I am getting null pointer exceptions. class A extends Activity { ... public void clear(){} } class B extends Activity{ public void clearData() { A a=new A(); a.clear(); } } 回答1: class A extends Activity{ static A instance; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); instance = this; } public static A getInstance() { return instance; } .... public void

问题 I am using an AppIntro library in my app. It has 3 slides. I want to ask the user something when the third slide is shown. To achieve that I am using material dialogs by afollestad. My code in the AppIntro Activity looks like that: @Override public void onNextPressed() { if(this.pager.getCurrentItem() == 2) { MaterialDialog dialog = new MaterialDialog.Builder(getApplicationContext()) .title("QR Code scannen") .content("Möchtest du den QR Code scannen oder selbst eingeben?") .positiveText(

问题 I am using an AppIntro library in my app. It has 3 slides. I want to ask the user something when the third slide is shown. To achieve that I am using material dialogs by afollestad. My code in the AppIntro Activity looks like that: @Override public void onNextPressed() { if(this.pager.getCurrentItem() == 2) { MaterialDialog dialog = new MaterialDialog.Builder(getApplicationContext()) .title("QR Code scannen") .content("Möchtest du den QR Code scannen oder selbst eingeben?") .positiveText(

问题 I am using an AppIntro library in my app. It has 3 slides. I want to ask the user something when the third slide is shown. To achieve that I am using material dialogs by afollestad. My code in the AppIntro Activity looks like that: @Override public void onNextPressed() { if(this.pager.getCurrentItem() == 2) { MaterialDialog dialog = new MaterialDialog.Builder(getApplicationContext()) .title("QR Code scannen") .content("Möchtest du den QR Code scannen oder selbst eingeben?") .positiveText(

问题 Official documentation about Activity lists out 7 life cycle methods. onPostResume() was not quoted as life cycle method. But I feel that this method is important method. During the life cycle, when an activity is visible from hidden to show state, onRestart() onStart() onResume() onPostResume() have been invoked in order. My code snippet: package ravindra.projects.my_app_1; import android.content.Intent; import android.content.IntentFilter; import android.os.PersistableBundle; import android