How to use fix crashes for marshmallow for android app development.

Audio Streaming In Android

public class ListenAudio extends Activity {
   

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        Intent in = getIntent();
        String path = in.getStringExtra("Path");
      
        MediaPlayer mediaPlayer = new MediaPlayer();
        mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        try {
            mediaPlayer.setDataSource(path);
        } catch (IllegalArgumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try {
            mediaPlayer.prepare();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } // might take long! (for buffering, etc)
        mediaPlayer.start();
      
            }
}

How to change textcolor of tab text in Android

How to change textcolor of tab text in Android

TabHost tabs = (TabHost)findViewById(R.id.TabHost01);
        tabs.setup(getLocalActivityManager());
      
      
        TabHost.TabSpec search = tabs.newTabSpec("tag1");
        search.setContent(new Intent(this,Searchgurbani.class));
        search.setIndicator("Find Me");
        tabs.addTab(search);
      
        TabHost.TabSpec pref = tabs.newTabSpec("tag5");
        pref.setContent(new Intent(this,Preferencegurbani.class));
        pref.setIndicator("Settings");
        tabs.addTab(pref);
      
        TabHost.TabSpec favorite = tabs.newTabSpec("tag6");
        favorite.setContent(new Intent(this,Favroite.class));
        favorite.setIndicator("BookMark");
        tabs.addTab(favorite);
      
        for(int i=0;i<tabs.getTabWidget().getChildCount();i++)
        {
            TextView tv = (TextView) tabs.getTabWidget().getChildAt(i).findViewById(android.R.id.title);
            tv.setTextColor(Color.parseColor("#ffffff"));
        }

how to get shai finger print for google map api v2

Step 1
open command promp
step 2
navigate to folder where java is installed
step  3
then navigate  go to jdk folder bin form there type the below command
The path in inverted comma below is the path of android debug key stroke which can be found in C drive under particular user folder just replace the path
step 4 type the command

keytool.exe -v -list  -keystore "C:\Users\NewPC\.android\debug.keystore" -storepass android -keypass android



output will be like this




Keystore type: JKS
Keystore provider: SUN

Your keystore contains 1 entry

Alias name: androiddebugkey
Creation date: 7 Feb, 2013
Entry type: PrivateKeyEntry
Certificate chain length: 1
Certificate[1]:
Owner: CN=Android Debug, O=Android, C=US
Issuer: CN=Android Debug, O=Android, C=US
Serial number: 511358c0
Valid from: Thu Feb 07 13:03:20 IST 2013 until: Sat Jan 31 13:03:20 IST 2043
Certificate fingerprints:
         MD5:  0E:CE:35:CE:CB:66:CC:80:95:68:85:EB:B4:8A:9F:4F
         SHA1: B9:BC:1A:87:5A:9E:29:8A:DE:BD:41:19:63:A1:FD:60:04:EA:83:4A
         Signature algorithm name: SHA1withRSA
         Version: 3


*******************************************
*******************************************

you will ge thet dtail output of all keys including shai finger print then follow the steps in google api website

Class cast exception

This Exception mainly occur because when we create an action on click of a button or an action to be performed on start of an activity ,but we forget the write the code in the activity for which we wrote intent to go.
for example in  a main.xml file we have 7 buttons.

<ScrollView  xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
        android:layout_height="fill_parent"
   
    >
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical"
        android:padding="30dp" >

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TRIMMER RESORT"
             android:textColor="#0060aa"
        android:textSize="25dp"
        android:textStyle="bold"
            android:layout_gravity="center"
            android:textAppearance="?android:attr/textAppearanceLarge" />

        <Button
            android:id="@+id/menu"
            android:textColor="#0060aa"
        android:textSize="15dp"
        android:textStyle="bold"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="MENU" />

        <Button
            android:id="@+id/events"
             android:textColor="#0060aa"
        android:textSize="15dp"
        android:textStyle="bold"
            android:layout_marginTop="10dp"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="EVENTS" />

        <Button
            android:id="@+id/directions"
             android:textColor="#0060aa"
        android:textSize="15dp"
        android:textStyle="bold"
               android:layout_marginTop="10dp"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="DIRECTIONS" />

        <Button
            android:id="@+id/bktable"
             android:textColor="#0060aa"
        android:textSize="15dp"
        android:textStyle="bold"
               android:layout_marginTop="10dp"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="BOOK A TABLE" />

        <Button
            android:id="@+id/share"
             android:textColor="#0060aa"
        android:textSize="15dp"
        android:textStyle="bold"
               android:layout_marginTop="10dp"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="SHARE" />

        <Button
            android:id="@+id/aboutus"
             android:textColor="#0060aa"
        android:textSize="15dp"
        android:textStyle="bold"
               android:layout_marginTop="10dp"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="ABOUT US" />

        <Button
            android:id="@+id/contactus"
             android:textColor="#0060aa"
        android:textSize="15dp"
        android:textStyle="bold"
               android:layout_marginTop="10dp"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="CONTACT US" />

    </LinearLayout>
</ScrollView>

we wrote the MainActivity
as:


import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity implements View.OnClickListener {
Button menu,events,share,direction,bookTable,aboutUs,contactUs;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        menu=(Button)findViewById(R.id.menu);
        events=(Button)findViewById(R.id.events);
        share=(Button)findViewById(R.id.share);
        direction=(Button)findViewById(R.id.directions);
        bookTable=(Button)findViewById(R.id.bktable);
        aboutUs=(Button)findViewById(R.id.aboutus);
        contactUs=(Button)findViewById(R.id.contactus);
        menu.setOnClickListener(this);
        events.setOnClickListener(this);
        events.setOnClickListener(this);
        share.setOnClickListener(this);
        direction.setOnClickListener(this);
        bookTable.setOnClickListener(this);
        aboutUs.setOnClickListener(this);
        contactUs.setOnClickListener(this);
       
    }

public void onClick(View v) {
if(v==menu)
{
Intent i=new Intent(MainActivity.this,menuDetailActivity.class);
startActivity(i);

}
else if(v==events)
{
Intent i=new Intent(MainActivity.this,eventDetailActivity.class);
startActivity(i);

}
else if(v==contactUs)
{
Intent i=new Intent(MainActivity.this,contacUsDetail.class);
startActivity(i);
}
else
{

}
// TODO Auto-generated method stub

}

 

}

Now if we jsut create the the three activities  cotactUsDetail,eventDetail and menudetail classesa and for get to write the implementation code there

we get

"CLASS CAST EXCEPTION"application force closes down

in order to resove it we need to write all the three java file ,register them in manifest file and set the content view to respective activity that is for every activity one xml file shoud be given.

like contact detail is given here

import java.util.List;

import android.app.Activity;

import android.content.Intent;

import android.content.pm.PackageManager;

import android.content.pm.ResolveInfo;

import android.net.Uri;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class contacUsDetail extends Activity implements OnClickListener{

Button call,email;

public void onCreate(Bundle icicle)

{

super.onCreate(icicle);

setContentView(R.layout.contactusdetail);

call=(Button)findViewById(R.id.call);

email=(Button)findViewById(R.id.email);

call.setOnClickListener(this);

email.setOnClickListener(this);

}

public void onClick(View v) {

if(v==call)

{

Intent callIntent = new Intent(Intent.ACTION_CALL);

   callIntent.setData(Uri.parse("tel:123456789"));

   startActivity(callIntent);

}

else if(v==email)

{

final Intent intent = new Intent(android.content.Intent.ACTION_SEND);

   intent.setType("text/plain");

   

   startActivity(intent);

 }

}

// TODO Auto-generated method stub

}

contact detail.xml is given here

<?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:orientation="vertical" 

    android:padding="30dp">

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="50dp"

        android:text="CALL US"  

        android:textSize="15dp"

  android:textColor="#0060aa"

        

        android:textStyle="bold"

       

       

        android:textAppearance="?android:attr/textAppearanceLarge" />

    <Button

        android:id="@+id/call"  android:textColor="#0060aa"

        android:textSize="15dp"

        android:textStyle="bold"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="9052531507" />

    <TextView

        android:id="@+id/textView2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="EMAIL US" 

        android:textSize="15dp"

     android:textColor="#0060aa"

        android:textStyle="bold"

        

        android:textAppearance="?android:attr/textAppearanceLarge" />

    <Button

        android:id="@+id/email"  android:textColor="#0060aa"

        android:textSize="15dp"

        android:textStyle="bold"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="muza@cytrion.com" />

</LinearLayout>

Android ListView with Searchbox Sort items

This article is next step of List Example. Here we have a search box which sorts the list view as when the content matches the list items.

Why do we need this?

Imagine that if we have 2K to 3K items in the listview, It will not be possible to  scrolldown till 2000^th item.In this case this will be handy to cut short items.

To start with we add a edittext box and Listview added to LinearLayout.

[sourcecode language="xml"]

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/LinearLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical">

<EditText android:id="@+id/EditText01" android:layout_height="wrap_content" android:layout_width="fill_parent" android:hint="Search"></EditText><ListView android:id="@+id/ListView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content" ></ListView>

</LinearLayout>

[/sourcecode]

Have a sample String array that is to loaded as List items.

Create a temporary arraylist that hold the sorted items and Simply add it to the list view on addTextChangedListener() of edit text.

[sourcecode language="java"]

package com.androidpeople;

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;

public class searchsort extends Activity {
/** Called when the activity is first created. */
private ListView lv1;
private EditText ed;
private String lv_arr[]={"Android","Cupcake","Donut","Eclairs","AndroidPeople","Froyo",};
private ArrayList<String> arr_sort= new ArrayList<String>();
int textlength=0;
@Override
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.main);
lv1=(ListView)findViewById(R.id.ListView01);
ed=(EditText)findViewById(R.id.EditText01);
// By using setAdpater method in listview we an add string array in list.
lv1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , lv_arr));
ed.addTextChangedListener(new TextWatcher() {

public void afterTextChanged(Editable s) {
}

public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}

public void onTextChanged(CharSequence s, int start, int before,
int count) {

textlength=ed.getText().length();
arr_sort.clear();
for(int i=0;i<lv_arr.length;i++)
{
if(textlength<=lv_arr[i].length())
{
if(ed.getText().toString().equalsIgnoreCase((String) lv_arr[i].subSequence(0, textlength)))
{
arr_sort.add(lv_arr[i]);
}
}
}

lv1.setAdapter(new ArrayAdapter<String>(searchsort.this,android.R.layout.simple_list_item_1 , arr_sort));

}
});
}

}

[/sourcecode]

[gallery link="file"]

Android Listview Example

Today, we are going to see about a simple listview example. In Android, Listview is used to show a list of items in a vertically scrolling list.  Learn a listview of android array in this tutorial.

For instance, in a Registration form when we are selecting professions a list of items will be displayed. We can use Listview to display the list of items.

Your XML file should look like

[sourcecode language="xml"]

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/LinearLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<ListView android:id="@+id/ListView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>

[/sourcecode]

Your Java code looks like

[sourcecode language="java"]

public class ListviewExample extends Activity
{
private ListView lv1;
private String lv_arr[]={"Android","iPhone","BlackBerry","AndroidPeople"};
@Override
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.main);
lv1=(ListView)findViewById(R.id.ListView01);
// By using setAdpater method in listview we an add string array in list.
lv1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , lv_arr));
}
}

[/sourcecode]