Develop Reference

How to fix blurry imageView in Android app?

I have an activity, which only has an image. Which is way too blurry. How do I fix its blur and get it back sharp? I have not added any special things to it. And I actually want the image to cover at least half the screen. It is just the image which has become blurred and I can't figure out how to fix it since 5 hours.
My SorryAnim.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:background="#0C090A"
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.dhairyadev.sorry.SorryAnim" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:scale="centerCrop"
android:src="#drawable/pls" />
My SorryAnim.java:
package com.dhairyadev.sorry;
import android.app.Activity;
import android.content.Intent;
import android.media.Image;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;
public class SorryAnim extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sorry_anim);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.sorry_anim, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item){
switch(item.getItemId()){
case R.id.about_dev:
Intent intent = new Intent (getApplicationContext(), AboutDev.class);
startActivity (intent);
}
return false;
}
}
Looking for helpful answer ASAP. :)

The only thing that may make it blure is that you are stretching it to match_parent
<ImageView
android:id="#+id/imageView1"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
Or the image is assets is just blurred.
Try to remove the scaling and see if it is changing anything.

Your ImageView height and width are set to match_parent. Unless your drawable happens to be exactly the size of the screen, it will be stretched, i.e. interpolated. Try changing height and width to wrap_content to see the image in it's original form.

Button not showing up on screen Android Application

I have created an application where users can send and share text that they have input, if they click the send button, the text that they input will be displayed, if they click the share button, the application opens up a list of sharing methods (GMail, Messaging etc..), what I want is though, to allow the users to view there text and then share it, hwoever, when the user clicks send and it goes to the file activity_display, the text shows, but the button does not. Any ideas why? Could you fix this? Here's the code;
activity_display_message.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=".DisplayMessageActivity" >
<TextView
android:id="#+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="shareMessage"
android:layout_below="#+id/text_view"
android:text="test" />
</RelativeLayout>
MAIN PROBLEM: Button Share does not show.
EDIT: I suspect I may need to include something to this file, here's the code, any help?
DisplayMessageActivity.java:
package com.example.myfirstapp;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.support.v4.app.NavUtils;
import android.annotation.TargetApi;
import android.content.Intent;
import android.os.Build;
public class DisplayMessageActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the message from the intent
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
// Create the text view
TextView textView = new TextView(this);
textView.setTextSize(20);
textView.setText(message);
// Set the text view as the activity layout
setContentView(textView);
}
/**
* Set up the {#link android.app.ActionBar}, if the API is available.
*/
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
private void setupActionBar() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
getActionBar().setDisplayHomeAsUpEnabled(true);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.display_message, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// This ID represents the Home or Up button. In the case of this
// activity, the Up button is shown. Use NavUtils to allow users
// to navigate up one level in the application structure. For
// more details, see the Navigation pattern on Android Design:
//
// http://developer.android.com/design/patterns/navigation.html#up-vs-back
//
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
}

Since you are using RelativeLayout you need to specify where to layout your views. Try this for example:
<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=".DisplayMessageActivity" >
<TextView
android:id="#+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="shareMessage"
android:layout_below="#+id/text_view"
android:text="test" />

you are using relative layout. use linear layout instead. this will solve your problem.

You are using a relative layout. The objects are overlapping because you have not set them up to be LeftOf or Below or something like that.

Just replace your button with:
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/textView1"
android:layout_below="#+id/textView1"
android:onClick="shareMessage"
android:text="#string/button_share" />
And TextView with this:
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world" />

VideoView not showing video only audio coming in android 4.0.3 only

i have a basic example app to play video from res/raw. My problem is that it is not working(only audio playing) in android 4.0.3, but working in 3.2 , 4.3 , 4.4 (emulators). And on a real device (micromax canvas 4 with android 4.2.1) it says app has stopped responding.?
My question how can i play it on all android and why is it not responding on my moblie??
and i have already searched on stackoverflow with no positive result..
PLEASE HELP THANKS
this is my xml file
<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=".MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world" />
<VideoView
android:id="#+id/vidvew"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</RelativeLayout>
this is my .java file
package com.example.tryit;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.VideoView;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
VideoView vv = (VideoView) findViewById(R.id.vidvew);
String fileName = "android.resource://" + getPackageName() + "/" +R.raw.cs;
vv.setVideoURI(Uri.parse(fileName));
vv.start();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}

Check the encoding of the video properly. Android allows only certain types of file types to be played in the app. Please see the link below for more information -
http://developer.android.com/guide/appendix/media-formats.html

Android - Show image from res/drawable onClick

First of all, I wanna say I've been seeking for an answer on the Forum and I found didn't match for what I wanted. Basically, what I want is: when the user clicks on one of the images previously "specified" on the .xml file, a new image is displayed on the center of the screen that is not "specified" on the .xml file. I wrote "specified" cause idk if it's the correct way to refer to this.
EDIT: there was no need to not specify the image previously, all I needed was to set "gone" for visibiity. This code is working exactly how I wanted (ty guys):
Main.java
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.Toast;
public class Principal extends Activity {
ImageView cuia1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_principal);
cuia1 = (ImageView) findViewById(R.id.cuia1);
cuia1.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
ImageView cuia1grande = (ImageView) findViewById(R.id.cuia1grande);
cuia1grande.setVisibility(1);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.principal, menu);
return true;
}
}
activity.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/relativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TableLayout
android:id="#+id/tableLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:shrinkColumns="*"
android:stretchColumns="*">
<TableRow
android:id="#+id/tabelaCuias"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:gravity="center">
<TextView
android:id="#+id/selecionaCuia"
android:text="Selecione a cuia"
android:textStyle="bold">
</TextView>
<ImageView
android:id="#+id/cuia1"
android:src="#drawable/cuia1">
</ImageView>
<ImageView
android:id="#+id/cuia2"
android:src="#drawable/cuia2">
</ImageView>
<ImageView
android:id="#+id/cuia3"
android:src="#drawable/cuia3">
</ImageView>
<ImageView
android:id="#+id/cuia4"
android:src="#drawable/cuia4">
</ImageView>
</TableRow>
</TableLayout>
<ImageView
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_centerInParent="true"
android:visibility="gone"
android:id="#+id/cuia1grande"
android:src="#drawable/cuia1grande">
</ImageView>

Is there any reason you don't want to "specify" the image in your layout file? You could place it there and not display it (visibilty="gone"), and then show/hide it when you deem fit.
Here's what I'd do:
Make your layout a RelativeLayout instead of a TableLayout (this will make things easier for showing the image in the center)
Place your TableLayout within the wrapping RelativeLayout
Define an ImageView as the last child within the wrapping RelativeLayout, set centerInParent="true", visibilty="gone"
In your onClick method, simply set its visibility as visible.
If you really don't want to define the ImageView in the layout, then you can create it programmatically:
Follow the same steps 1-2 as before
Capture the reference to the wrapping RelativeLayout in the code
In the onClick method, create the ImageView programatically, specifying the centerInParent="true" via the code (let me know if you want an example on how to do this & I'll edit the answer with a code sample).
Add the new view to the RelativeLayout via myRelativeLayout.addView(myImageView);
Hope this helps :)

public class Principal extends Activity {
ImageView cuia1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_principal);
cuia1 = (ImageView) findViewById(R.id.cuia1);
//set invisible
cuia1 .setVisibility(View.INVISIBLE);
cuia1.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
//show image on the center of screen
//set image
cuia1.setImageResource(R.drawable.cuia1);
// set visible
cuia1 .setVisibility(View.VISIBLE);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.principal, menu);
return true;
}
}
import import android.view.View;
Cheerz!

ScrollView with two views, first view filling screen

I would like to have a ScrollView with a LinearLayout containing two views. The first view should occupy the full screen, with the second view initially off the screen (but it can be scrolled to). Is this achievable?

use this code
<ScrollView 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:fillViewport="true"
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=".MainActivity" >
<LinearLayout
android:id="#+id/linlayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<FrameLayout
android:id="#+id/f1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#468432" >
</FrameLayout>
<FrameLayout
android:id="#+id/f2"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#ff8222" >
</FrameLayout>
</LinearLayout>
</ScrollView>
and your activity gose like following
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.LinearLayout.LayoutParams;
import android.view.ViewTreeObserver;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
public class MainActivity extends Activity {
LinearLayout layout ;
FrameLayout f1,f2;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
layout = (LinearLayout)findViewById(R.id.linlayout);
f1=(FrameLayout) findViewById(R.id.f1);
f2=(FrameLayout) findViewById(R.id.f2);
ViewTreeObserver vto = layout.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
layout.getViewTreeObserver().removeGlobalOnLayoutListener(this);
int width = layout.getMeasuredWidth();
int height = layout.getMeasuredHeight();
f1.setLayoutParams(new LayoutParams(width, height));
f2.setLayoutParams(new LayoutParams(width, height));
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}

You don't need a ScrollView, a ViewPager is more suited to your needs. Also, since you want it to be vertical, you should check this out: Directional ViewPager

I had the hardest time once trying to achieve this in the iphone, maybe the ideas will help you. What I had was a background view with a notebook style set of lines, and a view on top of that with text, and of course they had to scroll together. I added both to the ScrollView and just intercepted the "scrollViewDidScroll" for view1 and did a view2.contentOffset=view2.contentOffset so that they stayed 'glued'. i just started on Android so I wouldn't know how to exactly achieve this there, but I think the principle wouldn't be much different. Hope this helps :)