Develop Reference

Generating QR Code on different activity in android

i have been trying to create a QR Code generator that generates the QR Code on a separate activity on button click. Below is my code but it crushes on button click. Where did i go wrong?
First class is MainActivity.class:
package com.example.profmox.myapplication;
import android.content.Intent;
import android.graphics.Bitmap;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.journeyapps.barcodescanner.BarcodeEncoder;
public class MainActivity extends AppCompatActivity {
TextView tx1;
Button btn1, btn2;
EditText edt1,edt2;
CheckBox ch;
String text2qr;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
edt1 = (EditText)findViewById(R.id.edit1);
edt2 = (EditText)findViewById(R.id.edit2);
btn1 = (Button)findViewById(R.id.login);
btn2 = (Button)findViewById(R.id.signup);
ch = (CheckBox)findViewById(R.id.check);
btn1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.v("EditText", edt1.getText().toString());
Log.v("EditText", edt2.getText().toString());
// text2qr = edt1.getText().toString().trim();
// MultiFormatWriter mfw = new MultiFormatWriter();
// try{
// BitMatrix btm = mfw.encode(text2qr, BarcodeFormat.QR_CODE,250,250);
// BarcodeEncoder ben = new BarcodeEncoder();
// Bitmap bmap = ben.createBitmap(btm);
// UserScreen.qr.setImageBitmap(bmap);
// }catch (WriterException e){
// e.printStackTrace();
// }
startActivity(new Intent(MainActivity.this, UserScreen.class));
}
});
btn2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(MainActivity.this, SignUp.class));
}
});
}
}
The layout file for the MainActivity class:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical"
android:paddingLeft="18dp"
android:paddingRight="18dp"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
android:background="#drawable/art_background"
tools:context="com.example.profmox.myapplication.MainActivity">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:layout_width="300dp"
android:layout_height="230dp"
android:layout_gravity="center_horizontal"
android:padding="16dp"
android:layout_marginTop="20dp"
android:src="#mipmap/logo"/>
<EditText
android:id="#+id/edit1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:inputType="textEmailAddress"
android:ems="10"
android:background="#android:color/transparent"
android:drawablePadding="12dp"
android:padding="8dp"
android:hint="Username"
android:textColorHint="#fff"
android:maxLines="1"
android:drawableLeft="#drawable/girl"
android:layout_marginTop="70dp"
/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#F2CC8F"/>
<EditText
android:id="#+id/edit2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:inputType="textPassword"
android:ems="10"
android:background="#android:color/transparent"
android:drawablePadding="12dp"
android:padding="8dp"
android:hint="Password"
android:textColorHint="#fff"
android:maxLines="1"
android:layout_marginTop="4dp"
/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#F2CC8F"/>
<CheckBox
android:id="#+id/check"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:textColor="#fff"
android:text="Remember Me"
android:padding="9dp"
/>
<Button
android:id="#+id/login"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/login_art"
android:text="Login"
android:textColor="#3D405B"
android:textAllCaps="false"
android:padding="16dp"
android:clickable="true"
style="#style/Base.TextAppearance.AppCompat.Body1"
android:layout_marginTop="23dp"
android:textSize="18sp"/>
<Button
android:id="#+id/signup"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/signuo_art"
android:text="Sign up"
android:textColor="#fff"
style="#style/Base.TextAppearance.AppCompat.Body1"
android:textAllCaps="false"
android:textSize="18sp"
android:layout_marginTop="16dp"
android:clickable="true"
android:padding="16dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Forgot your password?"
android:clickable="true"
style="#style/Base.TextAppearance.AppCompat.Body2"
android:padding="16dp"
android:layout_marginBottom="12dp"/>
</LinearLayout>
</ScrollView>
</LinearLayout>
The UserScreen.class is where i want to generate the QR Code in:
package com.example.profmox.myapplication;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.widget.ImageView;
public class UserScreen extends AppCompatActivity {
static ImageView qr;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.user_screen);
qr = (ImageView)findViewById(R.id.qrCode);
}
}
The layout file for the UserScreen.class:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/art_background"
android:paddingLeft="18dp"
android:paddingRight="18dp"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context="com.example.profmox.myapplication.UserScreen">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:id="#+id/qrCode"
android:layout_width="300dp"
android:layout_height="300dp"
android:layout_gravity="center_horizontal"/>
</LinearLayout>
</ScrollView>
</LinearLayout>

Video doesn't play in fragment

HI I'm making GymExercises App and every Exercise is written in different Fragment
so i want to add Video to show how exercise to do,it compiles but doesn't show anything can someone help me ?
PS i don't need play,stop button and anything other just to show the video
Here is the code that i add
Example:
BenchFragment.java
package com.Hristijan.Aleksandar.GymAssistant.Exercises;
import android.media.session.MediaController;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.VideoView;
import java.net.URL;
/**
* A simple {#link Fragment} subclass.
*/
public class BenchFragment extends Fragment {
public BenchFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_bench, container, false);
VideoView view = (VideoView)rootView.findViewById(R.id.video_view);
String path = "android.resource://" + getActivity().getPackageName() + "/" + R.raw.bench1;
view.setVideoURI(Uri.parse(path));
view.start();
return inflater.inflate(R.layout.fragment_bench, container, false);
}
}
fragment_bench.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:orientation="vertical"
android:background="#000000"
tools:context="com.Hristijan.Aleksandar.GymAssistant.Exercises.BenchFragment">
<VideoView
android:id="#+id/video_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
/>
<TableLayout
android:layout_marginTop="20dp"
android:layout_below="#+id/video_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:shrinkColumns="*">
<TableRow>
<TextView
android:text="#string/group"
android:background="#color/colorPrimary"
android:layout_width="500dp"
android:textColor="#ffffff"
android:textStyle="italic"
android:fontFamily="Arial"
android:textSize="17sp"
android:padding="5dip" />
</TableRow>
<TableRow>
<TextView
android:text="#string/bencbody"
android:textStyle="italic"
android:fontFamily="Arial"
android:textSize="17sp"
android:textColor="#ffffff"
android:padding="3dip" />
</TableRow>
<TableRow>
<TextView
android:text="#string/description"
android:textStyle="italic"
android:fontFamily="Arial"
android:textSize="19sp"
android:background="#color/colorPrimary"
android:textColor="#ffffff"
android:padding="5dip" />
</TableRow>
<TableRow>
<TextView
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:fontFamily="Arial"
android:gravity="left"
android:layout_marginTop="5dp"
android:text="#string/stepone"
android:textColor="#android:color/white"
android:textSize="15sp"
android:padding="3dip" />
</TableRow>
<TableRow>
<TextView
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:fontFamily="Arial"
android:layout_marginTop="5dp"
android:gravity="left"
android:text="#string/steptwo"
android:textColor="#android:color/white"
android:textSize="16sp"
android:padding="3dip" />
</TableRow>
</TableLayout>
</RelativeLayout>

android <merge /> can be used only with a valid viewgroup root and attachtoroot=true

I am trying to inflate a fragment xml that does not have merge anywhere in it. Yet I am being given the error stated in the question.
My fragment class :
package com.xxxxx.www.xxxxxx;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class ExcercisePlanFragment extends Fragment
{
public static ExcercisePlanFragment newInstance()
{
ExcercisePlanFragment fragment = new ExcercisePlanFragment();
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
return inflater.inflate(R.layout.fragment_excercise_plan, container, false);
}
}
Here is fragment_excercise_plan.xml :
<?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="#color/dark_bg"
android:orientation="vertical">
<RelativeLayout
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="0dp">
<Button
android:layout_width="wrap_content"
android:layout_height="44dp"
android:minWidth="88dp"
android:background="#color/mediumGray"
android:paddingLeft="24dp"
android:paddingRight="24dp"
android:layout_centerInParent="true"
android:textColor="#FFF"
android:textSize="14sp"
android:text="CREATE A PLAN"/>
</RelativeLayout>
<RelativeLayout
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="0dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:textColor="#FFF"
android:textSize="20sp"
android:text="OR" />
</RelativeLayout>
<RelativeLayout
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="0dp">
<Button
android:layout_width="wrap_content"
android:layout_height="44dp"
android:minWidth="88dp"
android:background="#color/mediumGray"
android:paddingLeft="24dp"
android:paddingRight="24dp"
android:layout_centerInParent="true"
android:textColor="#FFF"
android:textSize="14sp"
android:text="CHOOSE A PLAN"/>
</RelativeLayout>
</LinearLayout>
I have no idea where build.gradle is picking up merge. I have another fragment activity which is working perfectly.

Android - Add subview after animation

I'm trying to add a subview below another view after an animation. anyone have any idea what i'm doing wrong?
this.animate().translationY(newY - 170).setDuration(500).withEndAction(new Runnable() {
#Override
public void run() {
clearAnimation();
RouteBreakDownLayout routeBreakDownLayout = new RouteBreakDownLayout(mContext);
RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
p.addRule(RelativeLayout.BELOW, R.id.selected_route_layout);
routeBreakDownLayout.setLayoutParams(p);
addView(routeBreakDownLayout);
}
}).start();
Here is the XML for the layout. I have a scrollview embeded which will hold the content that needs to be animated in.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/selected_route_layout2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RelativeLayout
android:id="#+id/selected_route_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_gravity="bottom"
android:layout_alignParentBottom="true"
android:background="#FFF"
android:gravity="bottom"
android:padding="10dip">
<TextView
android:id="#+id/time_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginRight="10dp"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#1D1C18" />
<TextView
android:id="#+id/eta_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/time_label"
android:layout_toEndOf="#+id/time_label"
android:layout_toRightOf="#+id/time_label"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#7EC82F" />
<LinearLayout
android:id="#+id/route_breakdown"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="#+id/time_label"
android:layout_centerVertical="true"
android:layout_marginBottom="10dip"
android:layout_marginTop="10dip"
android:gravity="center_vertical"
android:orientation="horizontal" />
<TextView
android:id="#+id/via_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="#+id/route_breakdown"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#BDBDBD" />
<ImageButton
android:id="#+id/arrow_up"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:background="#null"
android:padding="15dip"
android:src="#drawable/transit_symbol_up_arrow" />
</RelativeLayout>
<ScrollView
android:layout_below="#+id/selected_route_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:showDividers="middle"
android:divider="?android:dividerHorizontal"
android:animateLayoutChanges="true"
android:paddingLeft="16dp"
android:paddingRight="16dp" />
</ScrollView>
</RelativeLayout>

What goes wrong for you in your code-snippet?
Here's working example I came up with:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/containerRelativeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<View
android:id="#+id/headerView"
android:background="#00FF00"
android:layout_width="match_parent"
android:layout_height="25dp"/>
<View
android:id="#+id/detailsView"
android:layout_alignParentBottom="true"
android:layout_width="match_parent"
android:layout_height="40dp"
android:clickable="true"
android:background="#FF0000"/>
</RelativeLayout>
And MainActivity is
package klogi.com.animationstestapp;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.RelativeLayout;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final View detailsView = findViewById(R.id.detailsView);
final View headerView = findViewById(R.id.headerView);
final RelativeLayout container = (RelativeLayout)findViewById(R.id.containerRelativeLayout);
container.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
detailsView.animate().translationY(-detailsView.getY()).setDuration(500).withEndAction(new Runnable() {
#Override
public void run() {
Button additionalButton = new Button(MainActivity.this);
additionalButton.setText("Additional button");
RelativeLayout.LayoutParams additionalButtonParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
additionalButtonParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
additionalButton.setLayoutParams(additionalButtonParams);
container.addView(additionalButton);
}
}).start();
headerView.animate().translationY(detailsView.getHeight()).setDuration(500).start();
}
});
}
}
It works just as expected.
Have you tried to add your control(RouteBreakDownLayout) without animation? Does it work? It can be something like control is actually adding, but it's out of the viewport, etc. - so far, I can just guessing.

Not-clipped childview of RelativeLayout is not clickable

I have the following activity. It is an simplification of a draggable map. The problem is that mytext2 is not clickable, even if it is visible. Can anybody tell me how to make it clickable? And for some reason the inner-RelativeLayout gets not bigger than screen size, even when i set this high dp.
<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="#0000ff"
android:clipChildren="false"
tools:context="${relativePackage}.${activityClass}" >
<RelativeLayout
android:layout_width="100000dp"
android:layout_height="100000dp"
android:background="#00ff00"
android:translationX="-100dp" >
<TextView
android:id="#+id/mytext1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#ff0000"
android:text="#string/hello_world"
android:translationX="400dp"
android:translationY="100dp" />
<TextView
android:id="#+id/mytext2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#ff0000"
android:text="#string/hello_world"
android:translationX="200dp"
android:translationY="100dp" />
</RelativeLayout>
</RelativeLayout>
class
package com.example.relativatest;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.mytext1).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
System.out.println("HELLO!1");
}
});
findViewById(R.id.mytext2).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
System.out.println("HELLO!2");
}
});
}
}

Use this code.
<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="#0000ff"
android:clipChildren="false"
tools:context="${relativePackage}.${activityClass}" >
<RelativeLayout
android:layout_width="100000dp"
android:layout_height="100000dp"
android:background="#00ff00"
android:translationX="-100dp" >
<TextView
android:id="#+id/mytext1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#ff0000"
android:text="#string/hello_world"
android:focusable="true"
android:padding="20dp"
android:translationX="400dp"
android:clickable="true"
android:translationY="100dp" />
<TextView
android:id="#+id/mytext2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#ff0000"
android:text="#string/hello_world"
android:translationX="200dp"
android:clickable="true"
android:padding="20dp"
android:focusable="true"
android:translationY="100dp" />
</RelativeLayout>
</RelativeLayout>