I am developing an Android application with a textview updated by one event and at the same place where the textview is present, I want 1 more textview so that other event can update this new textview. How do i achieve in having 1 textview on other
I'm assuming that you're asking how you could have two TextView components overlaying each other. There are a few way you could do this.
Frame Layout
Use a Frame Layout to determine the area in which the TextViews will occupy. Like this...
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/tv1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<TextView
android:id="#+id/tv2"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</FrameLayout>
Credit goes to https://stackoverflow.com/a/2634059/3769032
Create a Compound View
This is fairly in-depth for the type of question you are asking. CompoundViews are a collection of typical views, such as a TextView, that you can create if you plan on re-using the view frequently.
If you plan on overlaying the TextViews often, I recommend this. So check out this tutorial.
Use only one TextView
Having two overlayed textviews can become messy really quickly. If you have two pieces of text overlayed is becomes impossible to read. So since the content of your textview is based on an event. Use the same event listener in your java code to determine the content of your TextViews.
For example, in your on click listener you might have...
TextView tv1 = (TextView) findViewByID(R.id.tv1);
public void onClick(View view){
if (first_event_happened){
tv1.setText("One event happened");
} else if(second_event_happened){
tv1.setText("A different event happened");
}
}
These conditions might mean checking the type of view that was clicked, or checking its id (what I usually do). Please comment if things aren't clear. Some clarification on your question would be helpful too.
use relative layout and also you can set text on exiting textView like when event one triggered textView.setText(your text) and same when event two triggered textView.setText(your text)
There is no trick to this. Just put two TextViews in a RelativeLayout at the same position and they will draw overtop of one another. Like this:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/white">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="first textview"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="second textview"/>
</RelativeLayout>
You can make each one visible or invisible by using TextView.setVisibility(...) or you can set their text with TextView.setText(...).
Related
I have a TextView that displays an error message beside 2 Buttons. They are currently inside a horizontal LinearLayout. The problem is if the TextView is too wide, the 2 Buttons will be pushed off the screen. Is it possible to push the elements downwards in those cases?
If the text is short there are no problems:
(Textview text) (Button1) (Button2)|(Edge of screen)
If the textview is long, I want to push the 2 buttons down a "row"
(Realllllllllllly long text that may|(Edge of screen)
span 2 lines)
(Button1) (Button2)|(Edge of screen)
I think you need to keep one more Linear layout below to your horizontal linear layout and need to check text size runtime if it's width is greater than required two button space then need to hide horizontal linear layout buttons and need to show below layout buttons
to refer how to check text size runtime refer below link :
Refer this link
Try this way: Use FlowLayout
<org.apmem.tools.layouts.FlowLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</org.apmem.tools.layouts.FlowLayout>
Inside FlowLayout you can put your view's and it will auto move to next line if not fit.
Yes you can do that, flexbox-layout is the solution.
How to use
Gradle dependency
dependencies {
implementation 'com.google.android:flexbox:0.3.2'
}
And xml code
<com.google.android.flexbox.FlexboxLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:flexWrap="wrap"
app:alignItems="stretch"
app:alignContent="stretch" >
<TextView
android:id="#+id/textview1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_alignSelf="flex_end"
/>
</com.google.android.flexbox.FlexboxLayout>
There are few other attributes also [read documentation], which you can try and find what works more suitable in you case.
you can use the TextView predefined method, to gave validation to end user like this
TextView textView=(TextView)findViewById(R.id.text_view);
textView.setError("Your Text is very wide please provide short text");
setError put red mark on textview view, with that we can tell the end user. provided text is wide
This the default way to make TextView scrollable:-
TextView txtView = (TextView)findViewById(R.id.book_detail);
txtView.setMovementMethod(new ScrollingMovementMethod());
txtView.setText("someLongStringHere");
but I think this is not working properly, when ever finger leaves the screen, it stop scrolling, which is can not say user friendly design.
Is there any way to make it in good way ?
like we have in iOS verocity scrolling.
Use this.
<ScrollView
android:id="#+id/myScrollview"
android:layout_width="match_parent"
android:layout_height="250dp"">
<TextView
android:id="#+id/myTextview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/longString" />
</ScrollView>
I'm a novice on the Android platform when it cames to development. However I'm going further from basic Views and I'd like to create something like the following buttons:
This is what I want to achieve. I first tought that a Button with a custom background would have sufficed. However I don't know any way to make that small darker line with the text inside. All of the image reacts like a button and gets highlighted when you touch it.
Can you help me?
If you look at the source code for Apollo you can see ArtistsFragment is not made up of Buttons but rather an inflated RelativeLayout created by a subclass of the SimpleCursorAdapter class.
Since any view can have an OnClickListener you can make any create a layout to look however you want and still have it act like a button:
// Or load it as an item from an existing layout.
View myView = this.getLayoutInflater().inflate(R.layout.anything);
myView.setOnClickListener(new OnClickListener(){
public void onClick(View arg0) {
// Do stuff.
}
});
Every segment with an image could be a Layout with the background set to the appropriate image. Then, you just put the button inside of the layout.
You have to use Framelayout or RelativeLayout. For example:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="center"
android:src="#drawable/your_drawabele" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="20dip"
android:layout_gravity="center_horizontal|bottom"
android:padding="12dip"
android:background="#AA000000"
android:textColor="#ffffffff"
android:text="your_text" />
</FrameLayout>
I recently asked a question about how to add a view on top of a view, after asking that I realized I needed to added a better layout to my app before proceeding further.
I was reading Android Layout Tricks but noticed it was specifically for text views and image views. I'm looking to do it with two custom views. So I decided to whip up a quick image in paint to hopefully show more clearly of what I'm wanting to do.
This is how I want my layout to split the views. :
This is how it would look with the views drawn. Obviously the purple and blue boundaries would be the background color (greyish). The data above simply displays the y-intercept of the graph drawn with respective color. (So there would be multiple graph views drawn on top of each other)
So my question is, what would my main content view look like? I assume it would have a Linear layout but I'm rather new to these layouts.
EDIT
Using TextViews I'm able to come up with something similar using the following XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:text="Data Placeholder"
android:background="#733674"
android:textSize="15pt"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="20"/>
<TextView
android:text="Graph Placeholder"
android:background="#374F82"
android:textSize="15pt"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="80"/>
</LinearLayout>
</LinearLayout>
So The only question that really remains is, am I supposed to use TextViews? Meaning in my Activity am I able to add my custom views where these TextViews are? Or am I supposed to add my custom view to the XML?
Ie.
<DataView
android:text="Data Placeholder"
android:background="#733674"
android:textSize="15pt"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="20"/>
<GraphView
android:text="Graph Placeholder"
android:background="#374F82"
android:textSize="15pt"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="80"/>
My custom views are written in Java and I'm not sure how I would let the layout know where the views are located if I was to do it this way.
Try this: http://developer.android.com/resources/tutorials/views/hello-linearlayout.html
It has some very useful information which might help you out in regards to layout_weight as Michell Bak mentioned in the comment.
And here's the page for the Hello Views:
http://developer.android.com/resources/tutorials/views/index.html
Not to be rude, but it would be much better for you to peruse these and learn the xml on your own. That way you can actually understand it and be better able to re-create it later.
I was quite overwhelmed at first with all the code I didn't understand (including xml files), but with a little practice it becomes very easy - just time consuming.
The main thing I'm confused about is what kind of View to put in the
layout. In the examples they use TextView or ImageView, but mine is a
custom view
Well, for your "Custom Data View", you would use a LinearLayout with android:layout_width="fill_parent" and android:layout_height="fill_parent" and android:layout_weight="1" and android:background="#BA4AAB" (See http://www.colorpicker.com/)
Then for your Custom Graph View, I would use:
android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="4" android:background="#7D4ABA"
Note the layout_weight and background values I put are kind of guesses, you might have to tweak them some to match what you want.
The two linearlayouts that I mentioned would be inside one larger LinearLayout with android:orientation="vertical"
Then for the data in the top, you would use 4 text Views, and in code, you'd use setText(...) on those text views to put your data in.
In the xml for textview1, you would add android:id="#+id/textview1" then in code add TextView textview1 = (TextView)findviewbyId(R.id.textview1); then textview1.setText(myString);
For the graph in the bottom part, you would use 2 views for the base of the graph, and set there android:layout_width and android:layout_height to whatever suits you using dip, dp, or px units.
For the lines that you draw, I believe you would have to use the canvas class with a bitmap and call canvas.drawLine(...) (see http://developer.android.com/reference/android/graphics/Canvas.html)
I have a linearlayout which have a textbox(multiline, nearly 5 lines) and image view. Is it possible to draw a image on textview(overlapping)?
Note: I have to specify the coordinates of the image, which are not static, and may be anywhere above text.
Something like this mockup:
I think it can be achieved using RelativeLayout.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/Textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp"
android:text="#string/Text2display"
android:textColor="#EEDCAA" />
<ImageView
android:id="#+id/choose_img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="-46dp"
android:adjustViewBounds="true"
android:contentDescription="#string/description_logo"
android:src="#drawable/user2" />
</RelativeLayout>
By placing the TextView block above the ImageView, it ensures that the image view overlaps the TextView. Now, based on your requirements and position, use the following commands from the link :-
http://developer.android.com/reference/android/widget/RelativeLayout.LayoutParams.html
You can align left right, top and bottom. Use negative values to navigate the ImageView, if ur using align bottom and stuff.. This will make it to overlap. Please let me know if this was helpful
Is there any specific reason for Linear Layout?
You can do this easily using RelativeLayout . You can have an ImageView overlapping TextView Unless there is a specific reason for using LinearLayout .
If you really (really) need to use LinearLayout, you can subclass TextView and override onDraw to draw your image.
In all your xml files, should define the background color for it, it will solve the problem :
Add this android:background="#android:color/black" in to the View tag you defined.