Develop Reference

ImageView not displaying image set programmatically

I have an ImageView:
<androidx.appcompat.widget.AppCompatImageView
android:id="#+id/iconIv"
android:layout_width="64dp"
android:layout_height="64dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginBottom="16dp"
android:adjustViewBounds="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="ContentDescription"
tools:srcCompat="#sample/icon[1]" />
// I've also tried usual ImageView with no success
It's fully visible and I see its bounds in UiAutomatorViewer.
When I set image from XML, for example, app:srcCompat="#drawable/ic_telephone" it's displayed normally.
If I set the same image programmatically iconIv.setImageResource(R.drawable.ic_telephone) it does not display image.
It also does not work with Picasso:
Picasso
.with(iconIv.context)
.load(R.drawable.ic_telephone)
.into(iconIv)
or
Picasso
.with(iconIv.context)
.load(appTask.iconUrl)
.into(iconIv)
or with Glide:
Glide
.with(iconIv.context)
.load(appTask.iconUrl)
.into(iconIv)
Why?

You need get()
https://square.github.io/picasso/
Picasso.get()
.load(R.drawable.ic_telephone)
.into(iconIV);

Hmm, try this, AppCompatImageView you need that.
I just tested FYI
private AppCompatImageView mImv;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mImv = findViewById(R.id.iconIv);
mImv.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.v(TAG, "onClick: ");
}
});
mImv.setImageResource(R.drawable.ic_save);

Glide load quality photo depending on size of imageview [low if size small(icon)]

I know this kind question has been aroud but I'm having a specific issue ..
I'm using a glide library to transform image path in my sqlite database to imageviewin myexpendablelistview..and i'm using photoview library to make them zoomable ..the problem is the size of imageviw determine the quality of loaded images ..let me explain:
if the imageview is big then the loaded image is big and in zomming looks good. but if the imageview is small(let's say icon) ..then the loaded quality is bad and when zooming looks really bad.
i want to make a small imageview but when clicked get good quality image zoomable
This is my code:
case R.id.child3 :
ImageView url = (ImageView) view;
String urls;
urls = cursor.getString(cursor.getColumnIndex(Database.DATABASE_CHILD_3));
Glide.with(MainActivity.this).load(urls).into(url);
url.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
AlertDialog.Builder mBuilder = new AlertDialog.Builder(MainActivity.this);
View mView = getLayoutInflater().inflate(R.layout.dialog_custom_layout, null);
PhotoView photoView = mView.findViewById(R.id.imageView);
photoView.setImageDrawable(((ImageView)view).getDrawable());
mBuilder.setView(mView);
AlertDialog mDialog = mBuilder.create();
mDialog.show();
}
});
break;
My list_child.xml
<ImageView
android:layout_width="200dp"
android:layout_height="200dp"
android:id="#+id/child3"
android:layout_centerHorizontal="true"
Dialog_custom_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<com.github.chrisbanes.photoview.PhotoView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
/>
</LinearLayout>

Solved it with adding noTransformation:
Glide.with(MainActivity.this).load(urls).apply(noTransformation()).into(url);
and
public static RequestOptions noTransformation() {
if (noTransformOptions == null) {
noTransformOptions = new RequestOptions()
.dontTransform()
.autoClone();
}
return noTransformOptions;
}

androidplot: insert logo on graph

I would like to add a logo, or generally one or more bitmap,on androidplot graph.
I think the solution is to transform the androidplot graph as a bitmap and then add the other bitmap above.
But this solution is not good because convert the graph into bitmap i lose the quality of the graph.
The ideal would be not convert into bitmap. can someone help me?
thanks

Use FrameLayout for this purpose,
Add your graph xml code in FrameLayout and Add another ImageView or Button or what ever you like in FrameLayout
I am placing an ImageView in the bottom right corner of the Graph. You can change it.
XML Code:
<FrameLayout
android:id="#+id/frame_for_graph"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<com.androidplot.xy.XYPlot
android:id="#+id/mySimpleXYPlot"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
title="Stats" />
<ImageView
android:id="#+id/iv_Logo"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginBottom="20dp"
android:layout_gravity="right|bottom"
android:src="#drawable/ic_launcher" />
</FrameLayout>
Java Code for Logo:
ImageView logo = (ImageView) findViewById(R.id.iv_Logo);
logo.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "Logo Clicked",
Toast.LENGTH_LONG).show();
//Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("YOUR COMPANY URL"));
//startActivity(browserIntent);
}
});
SnapShot:

How to load thumbnail from custom directory?

I have searched a lot but I got samples to fetch thumbnail from an Url or from Http,
but I actually need to get thumbnail of an image from my own directory on sdcard withot accesing the Android default thumbnail directory, thats is I need to fetch a thumbnail of an image from
mnt/sdcard/myown/1.png
Can anybody help for this please?
Thanks in advance.

Environment.getExternalStorageDirectory() returns "/mnt/sdcard"
String imagePath = Environment.getExternalStorageDirectory().toString() + PATH_TO_IMAGE;
Bitmap bitmap = BitmapFactory.decodeFile(imagePath);

#Override
public void onCreate(Bundle savedInstanceState) {
button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(onClickListener);
image = (ImageView) findViewById(R.id.imageView1);
}
private OnClickListener onClickListener = new OnClickListener() {
#Override
public void onClick(final View v) {
switch(v.getId()){
case R.id.button1:
String imagePath = Environment.getExternalStorageDirectory().toString() +"/myown/1.png";
Bitmap bitmap = BitmapFactory.decodeFile(imagePath);
image.setImageBitmap(bitmap);
break;
}
}
};
your layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/android" />
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Change Image" />
</LinearLayout>

Display image after button click

I am making a really simple android application that will display a picture after a button is clicked. I have searched for days and tried everything I can think of but cant seem to get it to work. I have been able to host the picture online and link to it but I want the content available offline too. Please help, sorry for the stupid question.
Update:
It is a fixed image and in my drawable resource. Here is the current code I am using to display the image from a URL. What changes should I make to to display that same image from my drawable resource?
JAVA
public class StandingOrders extends Activity
{
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public void buttonClick (View image)
{
Uri uri = Uri.parse("my url");
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent)
}
}
XML
<Button android:id="#+id/btn1"
android:layout_height="wrap_content"
android:layout_width="170px"
android:text="The Button"
android:layout_gravity="center"
android:clickable="true"
android:onClick="buttonClick">
</Button>

If it's a fixed image, include it as a drawable resource and use an ImageView to display it. If it's an image to download, you can do that in a separate thread and store it in a file or an SQLite data base, then again use an ImageView to see it.

Add an ImageView to your xml layout and call setImageResource from onClick.
setImageResource(R.drawable.yourImage);
Or you could set the image in your layout and make the ImageView hidden until you click the button. See setVisibility(View.GONE)

Check out this answer: https://stackoverflow.com/a/4896272/458968
In your case, the uri should be
Uri.parse("android.resource://com.company.app/"+R.drawable.my_image);

You can try to implement the method, which I am posting below. I have done something more or less similar to your requirement.
Method:
//method to zoom images
public void zoomImage(String imageUrl)
{
AlertDialog.Builder builder;
Context mContext = ExamActivity.this;
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.custom_dialog,
(ViewGroup) findViewById(R.id.layout_root));
//to close dialog
ImageView close_dialog = (ImageView) layout.findViewById(R.id.imageView_custom_dialog_close);
close_dialog.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
alertDialog.dismiss();
}
});
//to show image
WebView wv=(WebView) layout.findViewById(R.id.show_image_webView);
wv.getSettings().setBuiltInZoomControls(true);
wv.setInitialScale(200);
wv.loadUrl(imageUrl);
builder = new AlertDialog.Builder(mContext);
builder.setView(layout);
alertDialog = builder.create();
alertDialog.show();
}
the imageUrl is the url to the webpage containing the image. If you want to show a local image then just create a simple html page containing the image and use the local url.

Try this:-
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ImageView imageToDisplay = (ImageView) findViewById(R.id.imageToDisplay);
Button btnShowImage = (Button) findViewById(R.id.btnShowImage);
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
imageToDisplay.setVisibility(View.VISIBLE);
imageToDisplay.setImageResource(R.drawable.imagelogo);
}
});
}
}
In layout imageToDisplay's visibility is gone.

try following example
you can download "android-query-0.22.10.jar" file from following url.
http://www.java2s.com/Code/Jar/a/Downloadandroidquery02210jar.htm
main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.addbuttondynamic.AddButtonDynamic" >
<Button
android:id="#+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Load Image" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>
and Main.java
import com.androidquery.AQuery;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;
public class Main extends Activity {
Button btnLoad;
ImageView ivImage;
AQuery aQuery;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btnLoad=(Button)findViewById(R.id.button1);
ivImage=(ImageView)findViewById(R.id.imageView1);
aQuery=new AQuery(this);
btnLoad.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
//load image from /res folder.
ivImage.setImageResource(R.drawable.ic_launcher);
//load image from url.
aQuery.id(ivImage).image("you URL");
// if ivImage is not working in aQuery.id() then use R.id.imageView1.
}
});
}
}

activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.imagechange.MainActivity"
>
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="10dp"
android:text="#string/khilan"
android:onClick="btnOnClick"
/>
<ImageView
android:id="#+id/imageView1"
android:layout_width="800px"
android:layout_height="500px"
android:layout_marginTop="70dp"/>
</RelativeLayout>
MainActivity.java
public class MainActivity extends Activity
{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void btnOnClick (View view)
{
String imagename = "khilan";
int res = getResources().getIdentifier(imagename, "drawable", getPackageName());
ImageView iv = (ImageView) findViewById(R.id.imageView1);
iv.setImageResource(res);
}
}

Create a layout with image and button, make the image hidden and onClick set the visibility to VISIBLE.
Here is what the XML should look like:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/image"
android:src="#drawable/image1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone"/>
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show Image" />
</RelativeLayout>
and the following is the Java code
ImageView image = findViewById(R.id.image);
Button button = findViewById(R.id.got_it_button);
image.setVisibility(View.GONE);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
image.setVisibility(View.VISIBLE);
}
});
Good luck :)