CODEWITHSUNDEEP
javaandroidimageviewemulation
user1505181
user1505181

Reputation: 61

imageview appearing in emulator but not on test phone

i have a simple app that displays a table and below that displays an imageview with an image that changes depending on the row clicked on the table. It works and displays fine on the emulator but when i install it on my test phone it does not show. my code is here:

package com.coreservlets.widgets;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TableRow;
import com.welly.keychords.R;

public class keya extends Activity
{
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.keya);
    }

    public void rowClick(View view) {
        ImageView imagev = (ImageView) findViewById(R.id.imageView1);
        switch(view.getId()) {
        case R.id.one:
           imagev.setImageResource(R.drawable.achord);
            break;
        case R.id.two:
            imagev.setImageResource(R.drawable.bminor);
             break;
        case R.id.three:
            imagev.setImageResource(R.drawable.csharpdbminor);
             break;
        case R.id.four:
            imagev.setImageResource(R.drawable.dchord);
             break;
        case R.id.five:
            imagev.setImageResource(R.drawable.echord);
             break;
        case R.id.six:
            imagev.setImageResource(R.drawable.fsharpgbminor);
             break;
        case R.id.seven:
            imagev.setImageResource(R.drawable.gsharpdim);
             break;
        }
    }
}

my xml code is here:

<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#FF909090"
    android:stretchColumns="1" >

    <TableRow
    android:id="@+id/one"
    android:onClick="rowClick">

        <TextView
            android:layout_margin="2dip"
            android:layout_marginRight="2dip"
            android:background="#0000ff"
            android:padding="3dip"
            android:text="I" />

        <TextView
            android:layout_margin="2dip"
            android:layout_marginLeft="1dip"
            android:background="#0000ff"
            android:gravity="center"
            android:padding="3dip"
            android:text="A"
           />
    </TableRow>

    <TableRow
        android:id="@+id/two"
    android:onClick="rowClick">

        <TextView
            android:layout_column="0"
            android:layout_margin="2dip"
            android:background="#0000ff"
            android:padding="3dip"
            android:text="II" />

        <TextView
            android:layout_margin="2dip"
            android:background="#0000ff"
            android:gravity="center"
            android:padding="3dip"
            android:text="Bm" />
    </TableRow>

    <TableRow
        android:id="@+id/three"
    android:onClick="rowClick">

        <TextView
            android:layout_column="0"
            android:layout_margin="2dip"
            android:background="#0000ff"
            android:padding="3dip"
            android:text="III" />

        <TextView
            android:layout_margin="2dip"
            android:background="#0000ff"
            android:gravity="center"
            android:padding="3dip"
            android:text="C#m" />
    </TableRow>

    <View
        android:layout_height="2dip"
        android:background="#FF909090" />

    <TableRow android:background="#0000ff" >
    </TableRow>

    <TableRow
        android:id="@+id/four"
    android:onClick="rowClick">

        <TextView
            android:layout_margin="2dip"
            android:background="#0000ff"
            android:padding="3dip"
            android:text="IV" />

        <TextView
            android:layout_margin="2dip"
            android:background="#0000ff"
            android:gravity="center"
            android:padding="3dip"
            android:text="D" />
    </TableRow>

    <View
        android:layout_height="2dip"
        android:background="#FF909090" />

    <TableRow
        android:id="@+id/tableRow1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >
    </TableRow>

    <TableRow
        android:id="@+id/five"
    android:onClick="rowClick">

        <TextView
            android:layout_margin="2dip"
            android:layout_marginRight="2dip"
            android:background="#0000ff"
            android:padding="3dip"
            android:text="V" />

        <TextView
            android:layout_margin="2dip"
            android:layout_marginLeft="1dip"
            android:background="#0000ff"
            android:gravity="center"
            android:padding="3dip"
            android:text="E" />
    </TableRow>

    <TableRow
        android:id="@+id/six"
    android:onClick="rowClick">

        <TextView
            android:layout_margin="2dip"
            android:layout_marginRight="2dip"
            android:background="#0000ff"
            android:padding="3dip"
            android:text="VI" />

        <TextView
            android:layout_margin="2dip"
            android:layout_marginLeft="1dip"
            android:background="#0000ff"
            android:gravity="center"
            android:padding="3dip"
            android:text="F#m" />
    </TableRow>

    <TableRow
        android:id="@+id/seven"
    android:onClick="rowClick">

        <TextView
            android:layout_margin="2dip"
            android:layout_marginRight="2dip"
            android:background="#0000ff"
            android:padding="3dip"
            android:text="VII" />

        <TextView
            android:layout_margin="2dip"
            android:layout_marginLeft="1dip"
            android:background="#0000ff"
            android:gravity="center"
            android:padding="3dip"
            android:text="G#dim" />
    </TableRow>





    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="114dp"
        android:background="#000000"
        android:maxLines="10"
        android:text="The relative minor of the Major key of A is F#m. The 12 bar blues progression in A is: \n A | A | A | A | D | D | A | A | E | D | A | E" />





    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:background="#ffffff" />

</TableLayout>

the code for the imageview is right at the bottom of the xml layout. Any help on how to debug this?

Upvotes: 3

Views: 2416

Answers (5)

Ron
Ron

Reputation: 46

Perhaps a bit old, but this thread still helped me. I had the same problem. On the emulator my image, JPG, was showing perfectly. But on my phone the image was not displayed.

When I put a background color on my ImageView I did see the color on my phone, but no image.

Then I scaled down the image, from around 2000px width to 1000px width. And voila.. the image was visible.

It seems there are maximum image resoluations.

Upvotes: 0

user1505181
user1505181

Reputation: 61

ive solved it by changing the images to png format and making them 50% smaller. not sure why that works but it does!

Upvotes: 1

Rajesh
Rajesh

Reputation: 15774

This is just a guess, given that there can be other things that can go wrong - do you have drawables in the correct resource folder? Maybe you have images in the drawable-mdpi or drawable-ldpi folder that corresponds to the emulator and not in the drawable-hdpi corresponding to the device.

To test, suggest you to create a drawable folder (without any qualifier) and copy all the drawable files to that folder and check if you see the ImageView.

Update:

Use the hierarchyviewer to check the properties of the UI elements.

Upvotes: 1

hjm
hjm

Reputation: 421

Is the image view simply not showing? does it seem to be cutoff? try setting android:weight="1.0" or whatever number you want to the imageview or put the whole thing in a scroll view. that will solve the problem if it is being cutoff.

also another suggestion...

try wrapping the whole table layout inside a linear layout, and pull out your text view and image view at the very end. I am not 100% sure but I think you're only supposed to have table row inside of a table layout... however since its working on the emulator, not too sure.

-edit-

try this (put your textview and imageview in a tablerow)... it might work. 

<TableRow>
 <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="114dp"
        android:background="#000000"
        android:maxLines="10"
        android:text="The relative minor of the Major key of A is F#m. The 12 bar blues progression in A is: \n A | A | A | A | D | D | A | A | E | D | A | E" />
</TableRow>

<TableRow>
    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:background="#ffffff" />
</TableRow>

Upvotes: 0

Mukesh Soni
Mukesh Soni

Reputation: 6668

contain all the views in the xml (except the layout itself) in a scrollview. Maybe your phone screen height is not too large.

Upvotes: 0

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