Unfortunately "Project_Name" has been Stopeed Error in Emulator

Issue

I am a newbie in android developement. I am just making a simple project to save the font size of the text entered everytime seekbar moves.

I completed the project with no errors but when I run the application it shows error message in Emulator says "Unfortunately SharedPreferences has been Stopped".

I have searched in below links as well for this and applied all but there was no such error in my case:

1. Unfortunately app has stopped in Android Emulator
2. Unfortunately HelloListView has stopped
3. Unfortunately, *name of app* has stopped
4. Unfortunately, MyApp has Stopped In Emulator
5. unfortunately app has stopped in emulator
6. unfortunately the application has stoped
7. Unfortunately Project_Name Has Stopped
8. "Unfortunately, app name has stopped." android device or emulator

and few more.

Here's project's LAYOUT file is (sharedprefer.xml):

<Seekbar android:id="@+id/sb"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" />

<TextView
    android:id="@+id/tv"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/hello_world" />

<EditText android:id="@+id/et"
    android:hint="@string/txt"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" />

<Button
    android:id="@+id/b"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/s" />

.Java file is (Main.java) :

import android.app.Activity; import android.content.SharedPreferences; import android.os.Bundle; import android.view.Menu; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.SeekBar; import android.widget.SeekBar.OnSeekBarChangeListener; import android.widget.Toast;

public class Main extends Activity {

private SharedPreferences pref;
private String pName = "MyPref";
private EditText et;
private SeekBar sb;
private Button b;

private static final String FONT_SIZE_KEY = "fontsize";
private final static String TEXT_VALUE_KEY = "textvalue";


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

    et = (EditText) findViewById(R.id.et);
    sb = (SeekBar) findViewById(R.id.sb);
    b = (Button) findViewById(R.id.b);

    b.setOnClickListener(new View.OnClickListener(){
        public void onClick(View v){
            pref = getSharedPreferences(pName, MODE_PRIVATE);
            SharedPreferences.Editor editor = pref.edit();
            editor.putFloat(FONT_SIZE_KEY, et.getTextSize());
            editor.putString(TEXT_VALUE_KEY, et.getText().toString());

            editor.commit();

            Toast.makeText(getBaseContext(), "Saved" , Toast.LENGTH_LONG).show();
        }
    });

    pref = getSharedPreferences(pName, MODE_PRIVATE);
    float fontsize = pref.getFloat(FONT_SIZE_KEY, 14);

    sb.setProgress((int)fontsize);
    et.setText(pref.getString(TEXT_VALUE_KEY, ""));
    et.setTextSize(sb.getProgress());

    sb.setOnSeekBarChangeListener(new OnSeekBarChangeListener(){

        @Override
        public void onProgressChanged(SeekBar sbar, int progress, boolean fromUser) {
            // TODO Auto-generated method stub
            et.setTextSize(progress);
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
            // TODO Auto-generated method stub

        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

}

and I found errors in LOGCAT are :

07-17 13:12:18.369: I/Process(576): Sending signal. PID: 576 SIG: 9
07-17 13:12:30.760: D/AndroidRuntime(622): Shutting down VM
07-17 13:12:30.760: W/dalvikvm(622): threadid=1: thread exiting with uncaught exception (group=0x409961f8)
07-17 13:12:30.810: E/AndroidRuntime(622): FATAL EXCEPTION: main
07-17 13:12:30.810: E/AndroidRuntime(622): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nsa.sharedpreferences/com.nsa.sharedpreferences.Main}: android.view.InflateException: Binary XML file line #7: Error inflating class Seekbar
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.app.ActivityThread.access$600(ActivityThread.java:122)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.os.Handler.dispatchMessage(Handler.java:99)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.os.Looper.loop(Looper.java:137)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.app.ActivityThread.main(ActivityThread.java:4340)
07-17 13:12:30.810: E/AndroidRuntime(622):  at java.lang.reflect.Method.invokeNative(Native Method)
07-17 13:12:30.810: E/AndroidRuntime(622):  at java.lang.reflect.Method.invoke(Method.java:511)
07-17 13:12:30.810: E/AndroidRuntime(622):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
07-17 13:12:30.810: E/AndroidRuntime(622):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
07-17 13:12:30.810: E/AndroidRuntime(622):  at dalvik.system.NativeStart.main(Native Method)
07-17 13:12:30.810: E/AndroidRuntime(622): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class Seekbar
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:691)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
07-17 13:12:30.810: E/AndroidRuntime(622):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.app.Activity.setContentView(Activity.java:1835)
07-17 13:12:30.810: E/AndroidRuntime(622):  at com.nsa.sharedpreferences.Main.onCreate(Main.java:29)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.app.Activity.performCreate(Activity.java:4465)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919)
07-17 13:12:30.810: E/AndroidRuntime(622):  ... 11 more
07-17 13:12:30.810: E/AndroidRuntime(622): Caused by: java.lang.ClassNotFoundException: android.view.Seekbar
07-17 13:12:30.810: E/AndroidRuntime(622):  at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
07-17 13:12:30.810: E/AndroidRuntime(622):  at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
07-17 13:12:30.810: E/AndroidRuntime(622):  at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.view.LayoutInflater.createView(LayoutInflater.java:552)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.view.LayoutInflater.onCreateView(LayoutInflater.java:636)
07-17 13:12:30.810: E/AndroidRuntime(622):  at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.view.LayoutInflater.onCreateView(LayoutInflater.java:653)
07-17 13:12:30.810: E/AndroidRuntime(622):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:678)
07-17 13:12:30.810: E/AndroidRuntime(622):  ... 21 more

Please tell me what can be its solution.

Solution

Change

<Seekbar android:id="@+id/sb"

with

<SeekBar android:id="@+id/sb"

the b has to be a capital B

Answered By - Blackbelt