Android - ImageView blank (xml only)


Android - ImageView blank (xml only)



I am having a weird issue on my new project, I just cant display an image on my activity.
The ImageView shows a blank square.



screenshot



If I try with a black background and a picture with transparency, I can see the picture that appears in white even if it is supposed to be colored.
But if I try with a multi colored picture with no transparency, it just shows a blank square.



I tried on emulator and phone with the exact same result.



I checked all the related posts on Stackoverflow without any working solution.



My src :



I added a small picture in res/drawable/test2.png



Here is my (very basic) activity code / activity_main.xml:


<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorPrimaryDark">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/test2"
/>
</LinearLayout>



My Activity :
public class MainActivity extends AppCompatActivity {


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}



Manifest:


<application
android:name=".Application"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher"
android:supportsRtl="true"
android:theme="@style/AppTheme">

<activity
android:name=".activity.MainActivity"
android:label="@string/title_activity_main"
android:theme="@style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>

</application>

</manifest>



And my build file:
apply plugin: 'com.android.application'


android {
compileSdkVersion 27
buildToolsVersion "27.0.3"
defaultConfig {
applicationId "com.test.myappid"
minSdkVersion 19
targetSdkVersion 27
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:27.1.1'
compile 'com.android.support:design:27.1.1'
compile 'com.evernote:android-job:1.2.4'
compile 'com.android.volley:volley:1.1.0'
testCompile 'junit:junit:4.12'
androidTestCompile('com.android.support.test.espresso:espresso-core:3.0.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
}



Thanks for your help !





share your test2.png
– Hong Duan
2 days ago


test2.png





Exactly try with other picture
– Rohit Sharma
2 days ago





@HongDuan I tried with maybe 10 different pictures, different formats (jpg, bmp, mostly png) with transparency or not. Always the same: everything that is not transparent is blank. I just tried with this pic (shareicon.net/data/256x256/2016/09/16/829667_nature_512x512.png) and I get a blank circle
– Quetzalcoatl
2 days ago





There must be some hidden differences in your project, you'd better share a complete project which can reproduce this issue, you can publish it to you github so we can help you.
– Hong Duan
2 days ago





@HongDuan I solved the issue, see my comment below. Thank you for your time !
– Quetzalcoatl
2 days ago




3 Answers
3



Can you try using



android:scaleType:"centreInside"



to see if this is a scaling issue? Also, what is the dimens of the image?





Added android:scaleType="centerInside" on the ImageView but still blank
– Quetzalcoatl
2 days ago





did you check the dimens and size of the image?
– Yogesh Madaan
2 days ago



I would use glide to manage pictures honestly! It's gonna be easier in the long run to manage picture that way!



https://github.com/bumptech/glide



Also make sure that you set the following code for a cache optimization


@Override public void applyOptions(Context context, GlideBuilder builder) {
builder.setMemoryCache(new MemoryCacheAdapter());
}





Doesnt really solve the issue but it looks very interesting, i might use it in the future
– Quetzalcoatl
2 days ago



Ok my bad I just failed at copy / paste.



I had this in my style.xml:


<item name="android:tint">@color/colorLight</item>



Removing it fixed the issue.






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