I want my current listview to open a new listview when an item is pressed in current listview.

Question

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Every time I use to run the application.It crashes.What could be the issue??can anyone help me out.I have called 2nd activity using current activity's onClickItem method but it's not working

What I have tried:

MainActivity

package com.example.brandonmain.listviewexample1;

import android.app.ListActivity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
import android.widget.SectionIndexer;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.Dictionary;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

import static android.R.attr.name;

public class MainActivity extends ListActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

ListView resultsListView = (ListView) findViewById(R.id.results_listview);

HashMap<String, String> nameAddresses = new HashMap<>();
nameAddresses.put("Chairman Seceretery", "7th floor");
nameAddresses.put("Corporate Affairs Division", "6th floor");
nameAddresses.put("Director(Technical) Secretariat", "5th Floor");
nameAddresses.put("Operations", "5th Floor");
nameAddresses.put("Emergency Control room", "5th Floor");
nameAddresses.put("Enterprise risk management", "5th Floor");
nameAddresses.put("Business Planning", "5th Floor");
nameAddresses.put("Director(Finance) Secretariat", "4rth Floor");
nameAddresses.put("Finance", "4rth Floor");
nameAddresses.put("DIRECTOR (PERSONNEL) SECRETARIAT", "3rd Floor");
nameAddresses.put("Personnel", "3rd Floor");
nameAddresses.put("ED(LAW)& PLO", "3rd Floor");
nameAddresses.put("Business Planning", "3rd Floor");
nameAddresses.put("Transformation monitoring office", "3rd Floor");
nameAddresses.put("Vigilance", "2nd Floor");
nameAddresses.put("Administration", "2nd Floor");
nameAddresses.put("Parliament Cell", "2nd Floor");
nameAddresses.put("Corporate Planning", "2nd Floor");
nameAddresses.put("Coal Import Group", "2nd Floor");
nameAddresses.put("Director(P&SP) Secretariat", "1st Floor");
nameAddresses.put("Business Planning", "1st Floor");
nameAddresses.put("C & IT", "1st Floor");
nameAddresses.put("Medical & Health Service", "1st Floor");
nameAddresses.put("Director(RM&L) Secretariat", "1st Floor");
nameAddresses.put("CRMG", "1st Floor");
nameAddresses.put("ICVL", "1st Floor");
nameAddresses.put("O/o ED(Forest)", "1st Floor");
nameAddresses.put("Reception", "Ground Floor");
nameAddresses.put("State Bank Of India", "Ground Floor");
nameAddresses.put("Library", "Ground Floor");
nameAddresses.put("Basement", "Ground Floor");
nameAddresses.put("Administration-Kaushambi ", "Ground Floor");
Map<String, String> treeMap = new TreeMap<String, String>(nameAddresses);

List<HashMap<String, String>> listItems = new ArrayList<>();
SimpleAdapter adapter = new SimpleAdapter(this, listItems, R.layout.list_item,
new String[]{"First Line", "Second Line"},
new int[]{R.id.text1, R.id.text2});

Iterator it = treeMap.entrySet().iterator();
while (it.hasNext()) {
HashMap<String, String> resultsMap = new HashMap<>();
Map.Entry pair = (Map.Entry) it.next();
resultsMap.put("First Line", pair.getKey().toString());
resultsMap.put("Second Line", pair.getValue().toString());
listItems.add(resultsMap);
}
resultsListView.setAdapter(adapter);
}
@Override
public void onListItemClick(ListView l, View view, int position, long id)
{
super.onListItemClick(l, view, position, id);

if (position == 0) {
Intent intent = new Intent(this, Adminstrative.class);
startActivity(intent);
}
}

}

Mainxml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.brandonmain.listviewexample1.MainActivity">

<ListView
android:id="@+id/results_listview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fastScrollEnabled="true"
/>

I want my current listview to open a new listview when an item is pressed in current ListView.

MainActivity

package com.example.brandonmain.listviewexample1;

import android.app.ListActivity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
import android.widget.SectionIndexer;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.Dictionary;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

import static android.R.attr.name;

public class MainActivity extends ListActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

ListView resultsListView = (ListView) findViewById(R.id.results_listview);

HashMap<String, String> nameAddresses = new HashMap<>();
nameAddresses.put("Chairman Seceretery", "7th floor");
nameAddresses.put("Corporate Affairs Division", "6th floor");
nameAddresses.put("Director(Technical) Secretariat", "5th Floor");
nameAddresses.put("Operations", "5th Floor");
nameAddresses.put("Emergency Control room", "5th Floor");
nameAddresses.put("Enterprise risk management", "5th Floor");
nameAddresses.put("Business Planning", "5th Floor");
nameAddresses.put("Director(Finance) Secretariat", "4rth Floor");
nameAddresses.put("Finance", "4rth Floor");
nameAddresses.put("DIRECTOR (PERSONNEL) SECRETARIAT", "3rd Floor");
nameAddresses.put("Personnel", "3rd Floor");
nameAddresses.put("ED(LAW)& PLO", "3rd Floor");
nameAddresses.put("Business Planning", "3rd Floor");
nameAddresses.put("Transformation monitoring office", "3rd Floor");
nameAddresses.put("Vigilance", "2nd Floor");
nameAddresses.put("Administration", "2nd Floor");
nameAddresses.put("Parliament Cell", "2nd Floor");
nameAddresses.put("Corporate Planning", "2nd Floor");
nameAddresses.put("Coal Import Group", "2nd Floor");
nameAddresses.put("Director(P&SP) Secretariat", "1st Floor");
nameAddresses.put("Business Planning", "1st Floor");
nameAddresses.put("C & IT", "1st Floor");
nameAddresses.put("Medical & Health Service", "1st Floor");
nameAddresses.put("Director(RM&L) Secretariat", "1st Floor");
nameAddresses.put("CRMG", "1st Floor");
nameAddresses.put("ICVL", "1st Floor");
nameAddresses.put("O/o ED(Forest)", "1st Floor");
nameAddresses.put("Reception", "Ground Floor");
nameAddresses.put("State Bank Of India", "Ground Floor");
nameAddresses.put("Library", "Ground Floor");
nameAddresses.put("Basement", "Ground Floor");
nameAddresses.put("Administration-Kaushambi ", "Ground Floor");
Map<String, String> treeMap = new TreeMap<String, String>(nameAddresses);

List<HashMap<String, String>> listItems = new ArrayList<>();
SimpleAdapter adapter = new SimpleAdapter(this, listItems, R.layout.list_item,
new String[]{"First Line", "Second Line"},
new int[]{R.id.text1, R.id.text2});

Iterator it = treeMap.entrySet().iterator();
while (it.hasNext()) {
HashMap<String, String> resultsMap = new HashMap<>();
Map.Entry pair = (Map.Entry) it.next();
resultsMap.put("First Line", pair.getKey().toString());
resultsMap.put("Second Line", pair.getValue().toString());
listItems.add(resultsMap);
}
resultsListView.setAdapter(adapter);
}
@Override
public void onListItemClick(ListView l, View view, int position, long id)
{
super.onListItemClick(l, view, position, id);

if (position == 0) {
Intent intent = new Intent(this, Adminstrative.class);
startActivity(intent);
}
}

}

Mainxml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.brandonmain.listviewexample1.MainActivity">

<ListView
android:id="@+id/results_listview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fastScrollEnabled="true"
/>

2nd Activity: package com.example.brandonmain.listviewexample1;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.SimpleAdapter;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

public class Adminstrative extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_adminstrative);
ListView resultsListView1 = (ListView) findViewById(R.id.administrative);
HashMap<String, String> nameAddresses1 = new HashMap<>();
nameAddresses1.put("xyz", "7th floor");

Map<String, String> treeMap1 = new TreeMap<String, String>(nameAddresses1);

List<HashMap<String, String>> listItems1 = new ArrayList<>();
SimpleAdapter adapter1 = new SimpleAdapter(this, listItems1, R.layout.list_item,
new String[]{"First Line", "Second Line"},
new int[]{R.id.text1, R.id.text2});

Iterator it = treeMap1.entrySet().iterator();
while (it.hasNext()) {
HashMap<String, String> resultsMap1 = new HashMap<>();
Map.Entry pair = (Map.Entry) it.next();
resultsMap1.put("First Line", pair.getKey().toString());
resultsMap1.put("Second Line", pair.getValue().toString());
listItems1.add(resultsMap1);
}
resultsListView1.setAdapter(adapter1);

}
}

administrative.xml

<?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"
tools:context="com.example.brandonmain.listviewexample1.Adminstrative">

<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/adminstrative"
android:fastScrollEnabled="true"/>
</LinearLayout

Posted 24-Feb-18 3:08am

nikhil arora

Updated 24-Feb-18 4:49am

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Comments

David Crow 26-Feb-18 11:58am

Consider using the actual Android forum for such a (lengthy) question and code dump. This Q&A section is for much shorter questions and answers.

The exception tells you exactly what the problem is. Read here for more.

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nikhil arora · Accepted Answer · 2018-02-24T04:49:00

Logcat

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.brandonmain.listviewexample1/com.example.brandonmain.listviewexample1.MainActivity}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2581)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2647)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1502)
at android.os.Handler.dispatchMessage(Handler.java:111)
at android.os.Looper.loop(Looper.java:207)
at android.app.ActivityThread.main(ActivityThread.java:5763)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)
Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
at android.app.ListActivity.onContentChanged(ListActivity.java:243)
at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:418)
at android.app.Activity.setContentView(Activity.java:2190)
at com.example.brandonmain.listviewexample1.MainActivity.onCreate(MainActivity.java:30)
at android.app.Activity.performCreate(Activity.java:6270)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1113)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2534)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2647)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1502)
at android.os.Handler.dispatchMessage(Handler.java:111)
at android.os.Looper.loop(Looper.java:207)
at android.app.ActivityThread.main(ActivityThread.java:5763)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)