id tag

Return Type in Java

The return type of the function findViewById(); is a View Class, but why should the person receiving this return value be a View or a Data Type that inherits View such as textView? Aren't you going to...

No adapter attached; skipping layout error You're working so hard. Help me crying

public class frag extends ActionBarActivity{ private LinearLayoutManager lLayout; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R....

I wonder if I can make an application that works with wearable devices such as Galaxy Gear S2 and Mi-Band.

I'm going to make an application for my graduation exhibition. I've seen all the basic Android books, but there's no link to the wearable device.The application I designed should be able to link with ...

Android Studio Simple way to display latitude only

At the Android studioIt's simple. There are no other functions.Find the latitude of my location with GPS. If you press the button, I'll send you a toast message.Will it be difficult?

I have a question about the app development at the app development

Hello, I'm a beginner, but I want to try developing an app this time, so I'm just asking you a few questions.I want to make applications in the form of 'Zigzag' and 'Couponmoa', is it a native app dev...

Recording a Call Using Android 6.0 Audio Record

Starting with Android 6.0, VOICE_CALL in MediaRecorder.AudioSource no longer provides permission to the 3-rd party, making it impossible to record calls in the application (only record your own voice)...

Problems with different file sizes when loading and rewriting files to Bitmap

Bring the pictures of the gallery from Android and put them on Bitmap bm.compress(Bitmap.CompressFormat.PNG, SAMPLING, out); bm.compress(Bitmap.CompressFormat.JPEG, SAMPLING, out);What's wrong with th...

I have some questions about the Android method and terminology.

Android full screen edittext is not working.

<application android:name=.CustomStartApp android:allowBackup=true android:icon=@mipmap/ic_launcher android:label=@string/app_name> <activity android:name=.MainActivity android:theme=@style/...

I made Tab Bar using Fragment on Android, but there was an error, so I'm asking you this question.

public class MainActivity extends AppCompatActivity { Toolbar toolbar; Fragment fragment1; Fragment fragment2; Fragment fragment3; @Override protected void onCreate(Bundle savedInstanceState) { super...