I want to use CircularLayout in my android app and I'm following this Circular Layout .
Errors:
1)activity_main.xml and content_main.xml are not showing any design preview.
2)On running app, it shows Unfortunately, app has stopped.
3)The logcat shows ClassNotFoundException.
There is no compilation error or warning.
Following is my logcat:
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: FATAL EXCEPTION: main
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: Process: com.example.shalini.circlelayout, PID: 15699
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.shalini.circlelayout/com.example.shalini.circlelayout.MainActivity}: android.view.InflateException: Binary XML file line #12: Error inflating class com.example.shalini.circlelayout.MainActivity.Activity
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2338)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2390)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread.access$800(ActivityThread.java:151)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:110)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.os.Looper.loop(Looper.java:193)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5292)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at java.lang.reflect.Method.invokeNative(Native Method)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:515)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:828)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:644)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at dalvik.system.NativeStart.main(Native Method)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: Caused by: android.view.InflateException: Binary XML file line #12: Error inflating class com.example.shalini.circlelayout.MainActivity.Activity
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:707)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.parseInclude(LayoutInflater.java:839)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:745)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:255)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at com.example.shalini.circlelayout.MainActivity.onCreate(MainActivity.java:103)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.Activity.performCreate(Activity.java:5264)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2302)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2390)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread.access$800(ActivityThread.java:151)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:110)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.os.Looper.loop(Looper.java:193)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5292)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at java.lang.reflect.Method.invokeNative(Native Method)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:515)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:828)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:644)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at dalvik.system.NativeStart.main(Native Method)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.shalini.circlelayout.MainActivity.Activity" on path: DexPathList[[zip file "/data/app/com.example.shalini.circlelayout-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.shalini.circlelayout-2, /vendor/lib, /system/lib]]
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.createView(LayoutInflater.java:559)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.parseInclude(LayoutInflater.java:839)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:745)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:255)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at com.example.shalini.circlelayout.MainActivity.onCreate(MainActivity.java:103)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.Activity.performCreate(Activity.java:5264)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2302)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2390)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread.access$800(ActivityThread.java:151)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:110)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.os.Looper.loop(Looper.java:193)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5292)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at java.lang.reflect.Method.invokeNative(Native Method)
10-03 00:27:29.609 15699-15699/com.example.shalini.circlelayout E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:515)
Well I inferred from it that it's not able to locate the class com.example.shalini.circlelayout.MainActivity.Activity.
Question:
How do we deal with ClassNotFoundException in this case?
This is how my MainActivity.java looks like:
package com.example.shalini.circlelayout;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.AttributeSet;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
public class Activity extends View {
private final static int TOTAL_DEGREE = 360;
private final static int START_DEGREE = -90;
private Paint mPaint;
private RectF mOvalRect = null;
private int mItemCount = 5;
private int mSweepAngle;
private int mInnerRadius;
private int mOuterRadius;
private Bitmap mCenterIcon;
private int[] mColors = {Color.RED, Color.YELLOW, Color.GREEN, Color.BLUE, Color.CYAN};
private String[] mTitles = {"APPT CENTER", "MEDS CABINET", "CHECK-IN", "MY TRACKERS", "MY ACCOUNTS"};
public Activity(Context context) {
this(context, null);
}
public Activity(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public Activity(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setStrokeWidth(2);
mSweepAngle = TOTAL_DEGREE / mItemCount;
mInnerRadius = 125;
mOuterRadius = 400;
mCenterIcon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
}
@Override
protected void onDraw(Canvas canvas) {
int width = getWidth();
int height = getHeight();
if (mOvalRect == null) {
mOvalRect = new RectF(width / 2 - mOuterRadius, height / 2 - mOuterRadius, width / 2 + mOuterRadius, height / 2 + mOuterRadius);
}
for (int i = 0; i < mItemCount; i++) {
int startAngle = START_DEGREE + i * mSweepAngle;
mPaint.setColor(mColors[i]);
mPaint.setStyle(Paint.Style.FILL);
canvas.drawArc(mOvalRect, startAngle, mSweepAngle, true, mPaint);
mPaint.setColor(Color.BLACK);
mPaint.setStyle(Paint.Style.STROKE);
canvas.drawArc(mOvalRect, startAngle, mSweepAngle, true, mPaint);
int centerX = (int) ((mOuterRadius + mInnerRadius) / 2 * Math.cos(Math.toRadians(startAngle + mSweepAngle / 2)));
int centerY = (int) ((mOuterRadius + mInnerRadius) / 2 * Math.sin(Math.toRadians(startAngle + mSweepAngle / 2)));
canvas.drawBitmap(mCenterIcon, width / 2 + centerX - mCenterIcon.getWidth() / 2, height / 2 + centerY - mCenterIcon.getHeight() / 2, null);
mPaint.setColor(Color.BLACK);
mPaint.setStyle(Paint.Style.FILL);
canvas.drawText(mTitles[i], width / 2 + centerX - mCenterIcon.getWidth() / 2, height / 2 + centerY + mCenterIcon.getHeight(), mPaint);
}
mPaint.setColor(Color.WHITE);
mPaint.setStyle(Paint.Style.FILL);
canvas.drawCircle(width / 2, height / 2, mInnerRadius, mPaint);
canvas.drawBitmap(mCenterIcon, width / 2 - mCenterIcon.getWidth() / 2, height / 2 - mCenterIcon.getHeight() / 2, null);
super.onDraw(canvas);
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
This is my content_main.xml file:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:custom="http://schemas.android.com/apk/lib/com.google.custom"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:showIn="@layout/activity_main" tools:context=".MainActivity">
<com.example.shalini.circlelayout.MainActivity.Activity
android:id="@+id/pie"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
custom:dividerWidth="5dp"
custom:innerCircle="@drawable/profile_pic_icon"
custom:innerRadius="50dp"
custom:layoutMode="pie"
custom:sliceDivider="@android:color/transparent" >
<RelativeLayout
android:id="@+id/appt_center_container"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/ic_launcher1" >
<TextView
android:id="@+id/one"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="@string/appcenter"
android:textStyle="bold" />
</RelativeLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/ic_launcher2" >
<TextView
android:id="@+id/two"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="@string/medscabinet"
android:textStyle="bold" />
</RelativeLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/ic_launcher3" >
<TextView
android:id="@+id/three"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="@string/cjeckin"
android:textStyle="bold" />
</RelativeLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/ic_launcher4" >
<TextView
android:id="@+id/four"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="@string/mytrackers"
android:textStyle="bold" />
</RelativeLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/ic_launcher5" >
<TextView
android:id="@+id/five"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="@string/myaccounts"
android:textStyle="bold" />
</RelativeLayout>
</com.example.shalini.circlelayout.MainActivity.Activity>
</RelativeLayout>
And here is the activity_main.xml file:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
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:fitsSystemWindows="true"
tools:context=".MainActivity">
<android.support.design.widget.AppBarLayout android:layout_height="wrap_content"
android:layout_width="match_parent" android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar android:id="@+id/toolbar"
android:layout_width="match_parent" android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary" app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_main" />
<android.support.design.widget.FloatingActionButton android:id="@+id/fab"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_gravity="bottom|end" android:layout_margin="@dimen/fab_margin"
android:src="@android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
