Develop Reference

Always position "GOT IT" button of MaterialShowcaseView on the bottom left corner of the screen

I'm using the following library: https://github.com/deano2390/MaterialShowcaseView
I've been trying to find a way (for 2 days straight!) to always position the "GOT IT" button on the bottom left corner of the screen. How do I achieve that simply and effectively?
I will immediately accept the working answer. As you can see, I have a history of always accepting answers.
With Osama's answer, I get error:
com.example.me.myapplication E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.me.myapplication, PID: 4445
java.lang.IllegalStateException: Cannot start this animator on a detached view!
at android.view.RenderNode.addAnimator(RenderNode.java:812)
at android.view.RenderNodeAnimator.setTarget(RenderNodeAnimator.java:300)
at android.view.RenderNodeAnimator.setTarget(RenderNodeAnimator.java:282)
at android.animation.RevealAnimator.<init>(RevealAnimator.java:37)
at android.view.ViewAnimationUtils.createCircularReveal(ViewAnimationUtils.java:55)
at uk.co.deanwild.materialshowcaseview.CircularRevealAnimationFactory.animateInView(CircularRevealAnimationFactory.java:29)
at uk.co.deanwild.materialshowcaseview.MaterialShowcaseView.animateIn(MaterialShowcaseView.java:825)
at uk.co.deanwild.materialshowcaseview.MaterialShowcaseView$1.run(MaterialShowcaseView.java:794)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
MainActivity:
package com.example.me.myapplication;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import uk.co.deanwild.materialshowcaseview.MaterialShowcaseView;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// single example
new MaterialShowcaseView.Builder(this)
.setTarget(findViewById(R.id.hi))
.setDismissText("GOT IT")
.setContentText("This is some amazing feature you should know about! Indeed, this is just an example of a bug that can be easily fixed!")
.show();
}
}
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.me.myapplication.MainActivity">
<TextView
android:id="#+id/hi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.419" />
</android.support.constraint.ConstraintLayout>

This lib is based on ShowcaseView, take a look at it.
You can also go to the showcase_content.xml at the library module and put the tv_dismiss that is the "GOT IT" TextView into a RelativeLayout like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/content_box"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="16dp"
android:weightSum="1">
<TextView
android:id="#+id/tv_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="15dp"
android:paddingLeft="5dp"
android:textColor="#android:color/white"
android:textSize="30dp" />
<TextView
android:id="#+id/tv_content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="5dp"
android:textColor="#android:color/white"
android:textSize="20dp" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<TextView
android:id="#+id/tv_dismiss"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="20dp"
android:background="?android:attr/selectableItemBackground"
android:clickable="true"
android:layout_alignParentBottom="true"
android:paddingBottom="10dp"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:paddingTop="10dp"
android:textColor="#android:color/white"
android:textSize="22dp"
android:visibility="gone" />
</RelativeLayout>
</LinearLayout>
Go to MaterialShowcaseView.java and empty the applyLayoutParams() method and update the setDelay to 1000

Within the builder, add the following code.
mDismissButton.setGravity(Gravity.BOTTOM);

ClassCastException from View objects in android studio

In Android Studio, when i try to run my project i get a ClassCastException as following:
Caused by: java.lang.ClassCastException: android.widget.EditText cannot be cast to android.widget.RelativeLayout
when the View object is 100% RelativeLayout and not EditText.
The problem occurs on another View element if i comment out the above-related code..
I have tried cleaning and rebuilding the project, i have tried editing the XML file and change the ID, i have tried deleting the XML file and restarting Android Studio and then make a new XML file, all that to no avail.
Thank you for your help.
EDIT
When i add new views to the xml, with id that i never used, somehow the activity before it gets nulls on its own (and totally seperate) xml file.. this is weird because theres no reason why a simple view on a different xml file should impact another xml that is loaded even before it..
EDIT2
I inspected View rl = activityView.findViewById(R.id.notification); and found out that it gets etMessage which is another view element in the same XML and is infact an EditText type view.
The code before the exception occurs:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setInitialView();
}
private void setInitialView() {
RelativeLayout frame = (RelativeLayout) findViewById(R.id.activity_frame);
LayoutInflater layoutInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View activityView = layoutInflater.inflate(R.layout.chat, null,false);
frame.removeAllViews();
frame.addView(activityView);
chatMap.put("Public", new ArrayList<ChatMessageBox>());
// move the notification layout outside the screen
RelativeLayout rl = (RelativeLayout) findViewById(R.id.notification);
TranslateAnimation moveAnim = new TranslateAnimation(
TranslateAnimation.ABSOLUTE, 0, TranslateAnimation.ABSOLUTE, 0,
TranslateAnimation.RELATIVE_TO_SELF, 0, TranslateAnimation.RELATIVE_TO_SELF, -1);
moveAnim.setDuration(0);
moveAnim.setFillAfter(true);
rl.startAnimation(moveAnim);
}
This activity's parent XML, which is loaded with setContentView in its onCreate:
<?xml version="1.0" encoding="utf-8"?>
<!-- Making the drawer layout the root view -->
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- MAIN CONTENT -->
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/activity_frame"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</RelativeLayout>
<!-- The ListView to be displayed when the drawer layout is active -->
<ListView android:id="#+id/left_drawer"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:choiceMode="singleChoice"
android:divider="#android:color/transparent"
android:dividerHeight="0dp"
android:background="#111"/>
</android.support.v4.widget.DrawerLayout>
And the XML that has the appropriate view:
<?xml version="1.0" encoding="utf-8"?>
<!-- Making the drawer layout the root view -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:android1="http://schemas.android.com/apk/res/android"
android:id="#+id/chat_relative_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<ScrollView
android:id="#+id/scroller"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_above="#+id/bSendMessage"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:background="#drawable/chat_bg" >
<LinearLayout
android:id="#+id/chatWindowContainer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
</LinearLayout>
</ScrollView>
<Button
android:id="#+id/bSendMessage"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:background="#drawable/ic_send" />
<EditText
android:id="#+id/etMessage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignTop="#+id/bSendMessage"
android:layout_toLeftOf="#+id/bSendMessage"
android:paddingLeft="10dp"
android:background="#drawable/text"
android:textColor="#000000"
android:imeOptions="actionNone"
android:inputType="textMultiLine"
android:maxLines="4"
android:singleLine="true"
android:layout_alignParentRight="false"
android:layout_alignWithParentIfMissing="false" />
<!-- the desired element -->
<RelativeLayout
android:id="#+id/notification"
android:layout_width="fill_parent"
android:layout_height="30dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="#drawable/bg_upload"
>
<TextView
android:id="#+id/tvNotification"
android:layout_gravity="center"
android:text="New Message Recieved"
android:textAppearance="?android:attr/textAppearanceLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:textColor="#000000" />
</RelativeLayout>
</RelativeLayout>
Error log:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.raad/com.example.raad.activities.ChatActivity}: java.lang.ClassCastException: android.widget.EditText cannot be cast to android.widget.RelativeLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2351)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403)
at android.app.ActivityThread.access$600(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5391)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassCastException: android.widget.EditText cannot be cast to android.widget.RelativeLayout
at com.example.raad.activities.ChatActivity.setInitialView(ChatActivity.java:336)
at com.example.raad.activities.ChatActivity.onCreate(ChatActivity.java:43)
at android.app.Activity.performCreate(Activity.java:5122)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2315)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403) 
at android.app.ActivityThread.access$600(ActivityThread.java:165) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373) 
at android.os.Handler.dispatchMessage(Handler.java:107) 
at android.os.Looper.loop(Looper.java:194) 
at android.app.ActivityThread.main(ActivityThread.java:5391) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:525) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) 
at dalvik.system.NativeStart.main(Native Method)

The problem was probably with the cache of the application in the device itself.
I ran the application on a different device and there was no issue, so i cleared the data and cache from the device (Settings -> Apps) and uninstalled the app (just uninstalling didnt work), and now it works.

Change your onCreate like this:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.yourLayoutXmlName);
setInitialView();
}
Edit:
Try changing this line:
RelativeLayout rl = (RelativeLayout) findViewById(R.id.notification);
to
RelativeLayout rl = (RelativeLayout) activityView.findViewById(R.id.notification);
Hope it helps you.

R.id.activity_frame
does not exists in your xml file. Try to resolve this.
And post the complete code.

Expected receiver of type, but got android.support.v7.widget.TintContextWrapper

I have tried a lot to find solution. As Same Question found but It doesn't have answer what I want.
I have following XML File:
<LinearLayout
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:orientation="vertical"
android:id="#+id/add_appointment_parent_layout"
tools:context="com.potionowl.app.activity.AppointmentAddActivity">
<include layout="#layout/layout_toolbar"/>
<LinearLayout
android:layout_width="match_parent"
android:orientation="vertical"
android:padding="#dimen/padding_small"
android:layout_margin="#dimen/padding_medium"
android:layout_height="match_parent">
<android.support.v7.widget.AppCompatSpinner
android:id="#+id/add_appointment_doctor_spinner"
android:layout_width="match_parent"
android:prompt="#string/string_select_doctor_patient"
android:spinnerMode="dialog"
android:layout_margin="#dimen/padding_medium"
android:layout_height="wrap_content"/>
<LinearLayout
android:layout_width="match_parent"
android:orientation="horizontal"
android:layout_margin="#dimen/padding_medium"
android:layout_height="wrap_content"
android:baselineAligned="false">
<android.support.design.widget.TextInputLayout
android:id="#+id/add_appointment_date_title"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_margin="#dimen/padding_very_small"
android:layout_height="wrap_content">
<EditText
android:id="#+id/add_appointment_date_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="#string/string_add_app_date_for_appointment"
android:focusable="false"
android:onClick="PickDate"
android:singleLine="true"
android:inputType="datetime"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:id="#+id/add_appointment_time_title"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_margin="#dimen/padding_very_small"
android:layout_height="wrap_content">
<EditText
android:id="#+id/add_appointment_time_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="#string/string_add_app_time_for_appointment"
android:focusable="false"
android:onClick="PickTime"
android:singleLine="true"
android:inputType="datetime"/>
</android.support.design.widget.TextInputLayout>
</LinearLayout>
<android.support.design.widget.TextInputLayout
android:id="#+id/add_appointment_symptoms_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="#dimen/padding_medium">
<android.support.design.widget.TextInputEditText
android:id="#+id/add_appointment_symptoms_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:maxLines="5"
android:gravity="start"
android:hint="#string/string_add_app_symptoms"
android:lines="5"/>
</android.support.design.widget.TextInputLayout>
<android.support.v7.widget.AppCompatButton
android:layout_width="wrap_content"
android:layout_gravity="center"
style="#style/Base.Widget.AppCompat.Button.Colored"
android:layout_margin="#dimen/padding_medium"
android:onClick="addAppointmentButtonClick"
android:layout_height="wrap_content"
android:text="#string/apply_for_appointment"/>
</LinearLayout>
</LinearLayout>
I am getting Errors like:
05-10 23:27:16.942 13455-13455/com.potionowl.app E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.potionowl.app, PID: 13455
java.lang.IllegalArgumentException: Expected receiver of type com.potionowl.app.activity.AppointmentAddActivity, but got android.support.v7.widget.TintContextWrapper
at java.lang.reflect.Method.invoke(Native Method)
at android.view.View$DeclaredOnClickListener.onClick(View.java:4456)
at android.view.View.performClick(View.java:5207)
at android.view.View$PerformClick.run(View.java:21168)
at android.os.Handler.handleCallback(Handler.java:746)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
I don't know why it happens. Is there any solution? Thank you.

This is related to the way AppCompat inflates your layout. Try adding a programmatic onClick listener to your buttons rather than doing it within XML.
There's a discussion about it on Google Code. It's because you are using the AppCompat Buttons.

You could use butterknife annotations instead
#OnClick(R.id.IdForAppCompatButton)
public void doAction() {doSomething();}

In my case the problem was from setting the android:theme attribute to the view, (and also is related to the AppCompat library ... see #Peter Marozzi's answer).
So I simply removed the android: namespace from this line (from the view's style):
<item name="android:theme">#style/someTheme</item>
and make it likes:
<item name="theme">#style/someTheme</item>
and it works fine.
The interactive note is the problem is only on high-level APIs (23 I tested) and on low-level APIs (16 and 19 I tested) both methods (with or without android: namespace) work.

It worked for me to register the listener on the current DialogFragment class:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
dialogView = inflater.inflate(/*your layout*/, container, false);
dialogView.findViewById(R.id.close_button).setOnClickListener(this);
return dialogView;
}
#Override
public void onClick(View v) {
//Handle the button click event here
}

Not possible to click a Button

I'm having a weird issue with a button that is being shown on screen, but that I can't click. It is not that the onClick event is not firing, it seems that physically it does not react to clicks, as if it had a transparent layer on top of it.
The main Activity where it is built on:
public class MusicList extends Activity implements OnClickListener {
...
#Override
public void onCreate(Bundle bundle)
{
super.onCreate(bundle);
setContentView(R.layout.mymusic);
this.myTabHost = (TabHost)this.findViewById(R.id.th_set_menu_tabhost);
this.myTabHost.setup();
TabSpec ts = myTabHost.newTabSpec("TAB_TAG_1");
ts.setIndicator("Media Item",getResources().getDrawable(R.drawable.music));
ts.setContent(R.id.media_item_tab);
try {
relativeLayout = (RelativeLayout) myTabHost.findViewById(android.R.id.tabcontent).findViewById(R.id.media_item_tab);
} catch (NullPointerException e) {
Log.e(this.getClass().getSimpleName(),"Layout is not correct",e);
}
Button button = (Button)relativeLayout.findViewById(R.id.play_button);
// button.setClickable(true);
button.setOnClickListener(this);
myTabHost.addTab(ts);
}
#Override
public void onClick(View v) {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(itemData.get("ITEM_URL"))));
}
}
The layout, which is shown perfect on screen is like this:
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/th_set_menu_tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingTop="65px">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/media_item_tab"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="#+id/media_title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="30sp"
android:textColor="#40A5D9"
android:gravity="center"
android:layout_alignParentTop="true"
android:singleLine="true"
android:ellipsize="marquee"
android:text="Title"
>
</TextView>
<ImageView
android:id="#+id/media_cover"
android:layout_width="fill_parent"
android:layout_height="180px"
android:gravity="center"
android:layout_below="#+id/media_title"
android:src="#drawable/geniocover"
>
</ImageView>
<TextView
android:id="#+id/media_author"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textColor="#86CCF3"
android:gravity="center"
android:singleLine="true"
android:ellipsize="marquee"
android:layout_below="#+id/media_cover"
android:text="Author"
>
</TextView>
<TextView
android:id="#+id/media_album"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="18sp"
android:textColor="#DAFFFF"
android:gravity="center"
android:singleLine="true"
android:ellipsize="marquee"
android:layout_below="#+id/media_author"
android:text="Album (Year)"
>
</TextView>
<Button
android:id="#+id/play_button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Play"
android:textColor="#003983"
android:textStyle="bold"
android:textSize="20sp"
android:gravity="center"
android:layout_below="#+id/media_album"
android:clickable="true"
>
</Button>
</RelativeLayout>
<ListView
android:id = "#+id/tablist"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
</FrameLayout>
</TabHost>
Any suggestions?
Thanks!

You have a FrameLayout with two children when it's only intended to host one. The ListView was last added, will end up on top and is probably receiving all of your input.

I think the problem is caused by the complex structure of your tablayout.
Usually, I use a separate Activity holding the TabLayout and just put different activities as content into the tabhost (tabSpec.setContent(Intent intent)).
Actually this should solve your problem.
By the way, avoid using RelativeLayout where you could use a LinearLayout.

How to programmatically add view in ViewFlipper

I have following main layout:
<LinearLayout android:id="#+id/LinearLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical">
<ViewFlipper android:id="#+id/viewstack"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<!-- Here I want to add my views which are located in separated xml files. -->
</ViewFlipper>
</LinearLayout>
Here is example of my view:
view_url.xml
<LinearLayout android:id="#+id/LinearLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:gravity="center">
<EditText android:text="#+id/EditText01"
android:id="#+id/EditText01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<Button android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/btnGenerate"
android:text="Generate"/>
</LinearLayout>
view_text.xml
<LinearLayout android:id="#+id/LinearLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical">
<EditText android:text="#+id/EditText01"
android:id="#+id/EditText01"
android:layout_height="wrap_content"
android:contentDescription="Enter your text here"
android:layout_width="fill_parent"
android:height="200dp"/>
</LinearLayout>
I am trying to add views:
viewstack = (ViewFlipper) findViewById(R.id.viewstack);));
View viewText = (View) findViewById(R.layout.view_text);
viewstack.addView(viewText); < -- Emulator is crashing at this line
View viewUrl = (View) findViewById(R.layout.view_url);
viewstack.addView(viewUrl);
I dont have any idea what is wrong with my code. I decided to put all my views in one file, but I still want to know how to fix my initial code.

Yout View viewUrl = (View) findViewById(R.layout.view_url); is very wrong. findViewById is kinda like the get(String key) method the the directory where your directory is your current view/activity. It only looks up the element with that Id under it's children.
To create Java objects out of XML files you need use you need to use the LayoutInflater. Which is pretty straight forward, out of that you get the object you can pass to viewstack.addView(..) method.
Another way to achieve this would be to just include the other XML files into the first one by using either the include, merge tags, or the ViewStub. Depending on your requirements these might not be an option though, but what you are describing they should be, and you should use these instead of doing it programatically because it's just cleaner this way.

maybe this help:
this.flipper=(ViewFlipper)findViewById(R.id.flipper);
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.viewLoader=(View)inflater.inflate(R.layout.search_result_grid, null);
flipper.addView(viewLoader);
this.viewResultGrid=(View)inflater.inflate(R.layout.search_result_grid, null);
gvSearchResult=(GridView)viewResultGrid.findViewById(R.id.gridViewSearchResult);
flipper.addView(viewResultGrid);

It's name suggests that It will find by id not by layout.You should understand difference between layout and id.use like this one View v=(View)findViewById(R.id.your_view_id);

Easiest way to add by inflating View. Here some small snippet where you can find reference.
private View viewText;
private TextView txtPost;
private void setViewFlipperPost(String postData, String postType) {
if (postType.toLowerCase().toString().equals("text")) {
viewText = LayoutInflater.from(mContext).inflate(R.layout.activity_full_screen_textpost, null, false);
viewText.setTag(TAG_TEXT);
txtPost = (TextView) viewText.findViewById(R.id.txtTextPostFullScreenText);
txtPost.setText(postData);
viewFlipper.addView(viewText);
}
}

use viewflipper
<?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:background="#drawable/white"
android:orientation="vertical" >
<ViewFlipper
android:id="#+id/view_flipper"
android:layout_width="match_parent"
android:layout_height="410dp" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:text="first layout"
android:textColor="#845965"
android:textSize="25dp"
android:textStyle="bold" >
</TextView>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:text="second layout"
android:textColor="#654123"
android:textSize="25dp"
android:textStyle="bold" >
</TextView>
</LinearLayout>
//you can add many layout here
</viewFlipper>
<Button
android:id="#+id/flipbyclickNext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/bn1"
android:onClick="flipByClickNext" />
<Button
android:id="#+id/flipbyclickprevious"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="flipByClickPrevious"
android:background="#drawable/bp1" />
</LinearLayout>
MainActivity.java
public class MainActivity extends Activity {
private ViewFlipper viewFlipper;
//Button next,prev;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewFlipper = (ViewFlipper) findViewById(R.id.view_flipper);
}
public void flipByClickNext(View v)
{
if(viewFlipper.isFlipping())//Checking flipper is flipping or not.
{
viewFlipper.stopFlipping(); //stops the flipping .
}
viewFlipper.showNext();//shows the next view element of ViewFlipper
}
public void flipByClickPrevious(View v)
{
if(viewFlipper.isFlipping())//Checking flipper is flipping or not.
{
viewFlipper.stopFlipping(); //stops the flipping .
}
viewFlipper.showPrevious();
}
}