Recent questions tagged Android

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android - How to check if APK is signed or "debug build"?

As far as I know, in android "release build" is signed APK. How to check it from code or does Eclipse ... time, plus all programmers are lazy. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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765 views

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android - Progress bar while loading image using Glide

Can I load a spinner in placeholder with rotating animation until the image is loaded using Glide? I am trying to ... could help me out? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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454 views

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android - How do you make a LinearLayout scrollable?

I have lot of items on the screen and I need to use the scrollbar so the user can scroll down. However, ... add a scrollbar to a LinearLayout? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - DELETE_FAILED_INTERNAL_ERROR Error while Installing APK

I am using Android Studio 2.2 Preview. I am facing the issue Failure: Install failed invalid apk Error: While ... please suggest me solution??? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - Put buttons at bottom of screen with LinearLayout?

I have the following code, how do I make it so that the 3 buttons are at the bottom? <TextView android:id="@ ... :text="3" /> </LinearLayout> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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268 views

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android - How to make a round button?

I'm trying to make a round button, but I don't know how can I do it. I can make button with rounded ... is it possible on Android? Thank you. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - Animated loading image in picasso

I have the following code to load an image in Picasso, using a drawable for the placeholder to display ... .image_download_error) .into(view); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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267 views

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android - Handler vs AsyncTask

I'm confused as to when one would choose AsyncTask over a Handler. Say I have some code I want to run every ... I choose one over the other? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - How can I modify ripple color when using ?attr/selectableItemBackground as background?

I've seen some SO questions and they gave some possible methods to achieve what I want. For example: Use ... above. Thank you in advance! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - Failure [INSTALL_FAILED_ALREADY_EXISTS] when I tried to update my application

when I tried to update my applcation with new version that has same signature as previous one, shows above error. What I am missing? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - When a Fragment is replaced and put in the back stack (or removed) does it stay in memory?

Is the behavior similar to the way Activities work? For example with Activities it works like this: Activity A ... in a single Activity? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - 'Missing contentDescription attribute on image' in XML

I get an warning about [Accessibility]Missing contentDescription attribute on image in eclipse. This warning show at ... for your reading. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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248 views

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android - Does setWidth(int pixels) use dip or px?

Does setWidth(int pixels) use device independent pixel or physical pixel as unit? For example, does setWidth(100) set ... or 100 pxs? Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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192 views

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android - Trying to add adb to PATH variable OSX

I am trying to develop for android and I want to add the adb to my PATH so that I can launch it really ... this problem with OSX and Android? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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351 views

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android - " app-release.apk" how to change this default generated apk name

Whenever I generate a signed apk in Android Studio, by default it gives the name as app-release.apk... Can ... to select the location(only) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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497 views

1 answer

android - app-release-unsigned.apk is not signed

I downloaded the zip file of an Android app on github and I'm trying to run it, but I get a dialog with ... Studio. What am I supposed to do? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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319 views

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android - Evenly spacing views using ConstraintLayout

A common use for LinearLayout is to evenly space (weight) views, for example: How do you implement evenly spaced ... post, I/O session video See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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160 views

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android - Understanding Canvas and Surface concepts

I'm struggling to understand the process of drawing to SurfaceView and therefore the whole Surface/Canvas/Bitmap ... which Surface can do. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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178 views

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android - Google Play app description formatting

I've made an Android application that is available on Google Play. Now I want to add some more formatting ... app description for Google Play? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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175 views

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android - How can I insert image in a sqlite database

I want to put an image from camera to database using this database code. What should be the code for the save ... data to in the same activity. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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493 views

1 answer

android - Can't find Toolbar in an included layout

I have a Toolbar which has a custom TextView inside: <?xml version="1.0" encoding="utf-8"?> <android ... > tag, then everything works perfectly. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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206 views

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android - How to change the text of a CheckBox in listview?

I know its a silly question but I am not able to get it done. I want to change the text of a ChekcBox ... ; } Please guide me through this. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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583 views

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android - Kotlin and Firebase read and write data

I have learned Kotlin for 3 weeks so I would like to read the data from my Firebase database. This is ... a supertype) in 'AppCompatActivity' See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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205 views

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android - Is there any way to give everyone access to firestore database, but only via app?

I am creating Android application with Firestore. My app does not require authentication. Is there any security rule to ... you for your help! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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381 views

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android - Error : Please fix the version conflict either by updating the version of the google-services plugin

I'm having a problem with Google Services plugin. I updated google services to the latest version. I got a ... ) { delete rootProject.buildDir } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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174 views

1 answer

android - How to attach image from drawable to gmail?

I am trying to attach image from my gridview to gmail or facebook,but whenever i tried to attach my app got crash,and ... ; } return grid; } } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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428 views

1 answer

android - Why getApplicationContext() in constructor of Activity throws null pointer exception?

After some time spent bug hunting it turns out that : public class MainActivity extends BaseActivity { // ... is this documented ? Froyo See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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365 views

1 answer

android - How to show Dialog in onCreate method?

How to show Dialog in onCreate method ? Is that possible at all, I tried but I got leaked window exception. Can anyone suggest me anything ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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