so i was creating a pdf viewer and use a buttons to scroll down or up. so i tried using scrollTo but it's not working but it is working when i make a textview with a long text. is scrollTo only working in a text and not in pdf? since i'm not getting any error i don't know whats wrong the code. can someone suggest how can i make it work?
heres the xml:
<ScrollView
android:id="#+id/scroll_view"
android:layout_width="match_parent"
android:layout_height="140dp"
android:layout_marginVertical="140dp"
android:fillViewport="true"
android:padding="16dp">
<com.github.barteksc.pdfviewer.PDFView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/pdfviewer"
android:background="#color/cardview_dark_background"/>
<TextView
android:id="#+id/lorem_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/lorem_ipsum"
android:textAppearance="?attr/textAppearanceHeadline6"
android:textColor="#000000" />
</ScrollView>
my activity:
public class navigaze_scroll extends AppCompatActivity {
PDFView testpdf;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_navigaze_scroll);
final ScrollView scrollView = findViewById(R.id.scroll_view);
Button scrollUp = findViewById(R.id.up_button);
Button scrollDown = findViewById(R.id.down_button);
testpdf = (PDFView) findViewById(R.id.pdfviewer);
testpdf.fromAsset("pdf1.pdf")
.defaultPage(0)
.enableAnnotationRendering(true)
.scrollHandle(new DefaultScrollHandle(this))
.spacing(2)
//.pageFitPolicy(FitPolicy.WIDTH)
.load();
scrollUp.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
scrollView.scrollTo(0, scrollView.getScrollY() -24);
}
});
scrollDown.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
scrollView.scrollTo(0, scrollView.getScrollY() + 24);
}
});
}
}
edit: i forgot to change the scrollView to testpdf
Related
This question may have been asked before but I seem to not make much progress.
Basically I want to add an onclicklistener to my HorizontalScrollView that expands the image when pressed.
Here's the current code in the XML file:
<HorizontalScrollView
android:id="#+id/firstscrollview"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_gravity="left"
android:orientation="horizontal"
android:layout_marginTop="50dp">
<LinearLayout
android:id="#+id/firstlinear"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:orientation="horizontal" >
<ImageView
android:id="#+id/Cercie_button"
android:layout_width="100dp"
android:layout_height="100dp"
android:scaleType="fitCenter"
android:src="#drawable/image"/>
I've been trying out different things but I can't seem to get it to work, if anyone knows or can find a good example it would be very much appreciated!
Try this .
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
ImageView Cercie_button = findViewById(R.id.Cercie_button);
Cercie_button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// do something here
}
});
}
if i am not getting it wrong then what so difficult in it you have to just do this in your on create method
ImageView btn = findViewById(R.id.Cercie_button);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//write what you want to do
}
});
I have a Linearlayouts, a ScrollView and a button, I am not able to figure out why when I programmatically add a Checkbox to the Linearlayout, at the end of the view, the method from the scrollview
scrollview.scrollto(0, ScrollView.FOCUS_DOWN);
will not focus the last item added.
here the XML
<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:weightSum="100"
tools:context="com.eidotab.myapplication.MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="vertical"
android:padding="10dp"
android:layout_weight="30">
<ScrollView
android:id="#+id/scroll"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/linear"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
</ScrollView>
</LinearLayout>
<Button
android:id="#+id/boton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="TEST"/>
</LinearLayout>
and here the java:
public class MainActivity extends AppCompatActivity {
ScrollView scrollView;
LinearLayout linearLayout;
Button button;
int num = -1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
scrollView = (ScrollView) findViewById(R.id.scroll);
linearLayout = (LinearLayout) findViewById(R.id.linear);
button = (Button) findViewById(R.id.boton);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
num++;
CheckBox checkBox = new CheckBox(getApplicationContext());
checkBox.setText("TEST " + num);
checkBox.setTextColor(Color.BLACK);
linearLayout.addView(checkBox);
scrollView.fullScroll(ScrollView.FOCUS_DOWN);
}
});
}
}
Im also addind the .rar so you just have to download it and try it.. I have spent several hours trying to make it work.. also tried to get the specific child from the LinearLayout with the
y = Linearlayout.getchildat(N).getBottom();
and works similar to the FOCUS_DOWN... I can never see the very last item.. only the item before the last.
Thanks in advance for the help.
Here is the program
https://www.dropbox.com/home/Public?preview=MyApplication.rar
Well after some research, seems like there is some kind of problem when trying to perform scrolls programmatically and the solution I have found that work best is to add a runable inside the onClick method in my code so I added
scrollView.post(new Runnable() {
#Override
public void run() {
scrollView.fullScroll(ScrollView.FOCUS_DOWN);
}
});
and the end result was
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
num++;
CheckBox checkBox = new CheckBox(getApplicationContext());
checkBox.setText("TEST " + num);
checkBox.setTextColor(Color.BLACK);
linearLayout.addView(checkBox);
//scrollView.fullScroll(ScrollView.FOCUS_DOWN);
scrollView.post(new Runnable() {
#Override
public void run() {
scrollView.fullScroll(ScrollView.FOCUS_DOWN);
}
});
}
});
it is now working flawlessly but that said, I don´t think it is the ideal solution.
Hello this is my xml file
<RelativeLayout
android:id="#+id/tutorialBox"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="15dip"
android:paddingBottom="15dip">
<Button
android:id="#+id/closeBen"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="#string/CloseBenny"
android:layout_alignBottom="#+id/bennybox"
android:layout_alignEnd="#+id/chatbub" />
</RelativeLayout>
i have made an on click listener for it
final Button closeBt = (Button) findViewById(R.id.closeBen);
closeBt.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
closeBt.setText("Im a button");
}
});
for some reason when i click this button nothing happens it doesnt look like it has been clicked.
when i took the button out of the realtive layout everything worked fine
any suggestions?
Instead of this add onClick attribute to the button tag in xml.
<Button
android:id="#+id/closeBen"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="#string/CloseBenny"
android:onClick = "close_clicked"
android:layout_alignBottom="#+id/bennybox"
android:layout_alignEnd="#+id/chatbub" />
Then in Main Activity just make a new method like this.
public void close_clicked (View v){
// Your code
}
No need to add on click listner.
Your RelativeLayout does not look good, is it your main container? Maybe try it this way
<?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:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin">
<Button
android:id="#+id/closeBen"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="#string/CloseBenny"
android:layout_alignBottom="#+id/bennybox"
android:layout_alignEnd="#+id/chatbub" />
</RelativeLayout>
And a good practice is to declare your widgets globally then instantiate them in theOnCreate
public class Foo extends AppCompatActivity {
private Button closeBenny;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
closeBenny = (Button)findViewById(R.id.closeBen);
closeBenny.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
closeBenny.setText("Im a button");
}
});
}
}
i need some guidance. I need to make a custom view that touched and drag up the screen slides out of the screen. I have tried this cool library: here but this is dependend to exactly 2 layouts. The one that is slided out and the one that remains after that. What i have now is buggy and ugly.
public class DemoActivity extends Activity {
private SlidingUpPanelLayout mLayout;
private RelativeLayout layout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_demo);
layout = (RelativeLayout) findViewById(R.id.panel);
final int defaulttop = layout.getTop();
final int defaultbottom = layout.getBottom();
RelativeLayout dragView = (RelativeLayout) findViewById(R.id.dragView);
mLayout = (SlidingUpPanelLayout) findViewById(R.id.sliding_layout);
mLayout.setDragView(dragView);
mLayout.setPanelSlideListener(new PanelSlideListener() {
#Override
public void onPanelSlide(View panel, float slideOffset) {
}
#Override
public void onPanelExpanded(View panel) {
System.out.println("panel expanded");
}
#Override
public void onPanelCollapsed(View panel) {
System.out.println("panel collapsed");
}
#Override
public void onPanelAnchored(View panel) {
System.out.println("anchored");
}
#Override
public void onPanelHidden(View panel) {
System.out.println("panel is hidden now");
}
});
}
#Override
public void onBackPressed() {
if (mLayout != null && mLayout.isPanelExpanded()) {
mLayout.collapsePanel();
} else {
super.onBackPressed();
}
}
}
The layout:
<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"
tools:context=".DemoActivity" >
<com.sothree.slidinguppanel.SlidingUpPanelLayout
xmlns:sothree="http://schemas.android.com/apk/res-auto"
android:id="#+id/sliding_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/transparent"
android:gravity="bottom"
sothree:dragView="#+id/dragView"
sothree:panelHeight="60dp"
sothree:paralaxOffset="60dp"
sothree:shadowHeight="0dp" >
<RelativeLayout
android:id="#+id/panel"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/unt"
android:orientation="vertical" >
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_gravity="center"
android:text="Sleep" />
</RelativeLayout>
<RelativeLayout
android:id="#+id/dragView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/transparent"
android:clickable="true"
android:focusable="false" >
</RelativeLayout>
</com.sothree.slidinguppanel.SlidingUpPanelLayout>
</RelativeLayout>
it slides up but leaves a white background in the back. If i touch the screen then it slides. So, i need a new path. Did anyone confrunted with something similar? I need a hint, not code. Thanks.
I have used the library you mentioned here and it worked out fine for me. You might have not set the drag view/layout
Do use mSlidingPanelLayout.setDragView(YourLayout) to set the layout that can be dragged
I have done something like this previously but with a button.
I did it using Animation class when moving it by OnTouchListener. While you have to be careful while using it and control the X and Y values of the layout.
I need to disable the click-event for a button in Android. Just as a sample, I have tried doing the following. I have taken a TextView named it (entered a text) as Name. The condition checks if, TextView is empty button and clickable should be set to false. However this does not happen when the Toast is printed. Can somemone tell me the reason. Also if the text field is not empty I want to reset the clickable event for button as true.
Java File:
public class ButtonclickabkeActivity extends Activity {
TextView tv;
Button btn;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tv = (TextView) findViewById(R.id.textView1);
tv.setText("Name");
btn = (Button) findViewById(R.id.button1);
if (tv.getText().toString().length() != 0) {
btn.setClickable(false);
Toast.makeText(getApplicationContext(), "" + tv.getText().toString().length(), Toast.LENGTH_LONG).show();
} else {
btn.setClickable(true);
}
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
Toast.makeText(getApplicationContext(), "Button clicked", Toast.LENGTH_LONG).show();
}
});
}
}
XML file:
<?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">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/hello"/>
<TextView
android:text="TextView"
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:text="Button"
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
Use
btn.setEnable(false);
instead of
btn.setClickable(false);
User 370305 is correct. .setEnable is what your looking for. Or you could use android:clickable in the layout XML file.
In my case
getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
view.setEnabled(false);
}
});