Create custom dialog box in Android

Question

I found all things working with alert box,dialog box but when i try creating things with my own custom dialog box it gives me problems. Though i followed the instructions as per the dev guide: http://developer.android.com/intl/de/guide/topics/ui/dialogs.html i could'nt reach with my results just it displays a force close with the following error message.

03-04 11:37:08.780: ERROR/AndroidRuntime(726): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application

I have been trying to make my custom dialog box for many days but i couldnt bring it up. I even tried with the solutions that i got on forums but that too doesnt seems of working. Give me some piece of good code or some suggestion to work with... Any suggestions on this is appreciable.

Answer 1

Android Dialog - confused take a look on the question, looks similar to yours. Also you have to share a code which results in the error otherwise it is hard to help.

Answer 2

create custom_dialog xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:id="@+id/root"
    android:layout_height="match_parent">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Custom Dialog"
        android:textColor="#000"
        android:textSize="25dp"/>
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_height="wrap_content">
    <Button
        android:id="@+id/ok"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Ok"
        android:textColor="#000"
        android:textSize="19dp"/>
        <Button
            android:id="@+id/cancel"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Cancel"
            android:textColor="#000"
            android:textSize="19dp"/>
    </LinearLayout>
</RelativeLayout>

Add custom dialog View in MainActivity.java

package techamongus.com.testapplication;

import android.app.Activity;
import android.app.Dialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

public class MainActivity extends Activity {
Dialog customDialog;
    Button ok,cancel;
    Button showDialog;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        showDialog=(Button)findViewById(R.id.show);
        showDialog.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                customDialog.show();
            }
        });
        customDialog=new Dialog(this);
        LayoutInflater customInflater = (LayoutInflater)this.getSystemService(LAYOUT_INFLATER_SERVICE);
        View customLayout=customInflater.inflate(R.layout.custom_dialog, (ViewGroup) findViewById(R.id.root));
        customDialog.setContentView(customLayout);
        ViewGroup.LayoutParams layoutParams2= customLayout.getLayoutParams();
        layoutParams2.height=400;
        ok=(Button)customLayout.findViewById(R.id.ok);
        ok.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //done what do you want to do
                customDialog.dismiss();
            }
        });
        cancel=(Button)customLayout.findViewById(R.id.cancel);
        cancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //done what do you want to do
                customDialog.dismiss();
            }
        });
    }

}

here is your main_activity.xml

<?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:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    tools:context="techamongus.com.testapplication.MainActivity">
    <Button
        android:id="@+id/show"
        android:layout_width="200dp"
        android:layout_height="50dp"
        android:text="Show dialog"
        android:layout_gravity="center"
        android:textColor="#000"/>
</LinearLayout>

http://www.techamongus.com/2017/03/android-create-custom-dialog-program.html