title: Android Custom View Not Working
body: <p>Im trying a draw line chart. Accualy i m succed but when i want to show this view inside an activity im getting error (unexplained error) Im using android studio and all codes down here. </p>
  
  <p>My activity is never load. Throwing error.</p>
  
  <p><strong><em>View Class ;</em></strong></p>
  
  <pre><code>import android.content.Context;
  import android.graphics.Canvas;
  import android.graphics.Color;
  import android.graphics.Paint;
  import android.graphics.Point;
  import android.view.Display;
  import android.view.View;
  import android.view.WindowManager;
  import android.widget.Toast;
  
  import java.security.PublicKey;
  
  public class DwarView extends View {
  
  public int[]yuzde; //im getting some values
  
  Paint paint = new Paint();
  Paint paint2 = new Paint(); //my paints for drawing
  Paint paint3 = new Paint();
  
  
  public DwarView(Context context) {
      super(context);
      paint.setStrokeWidth(6f);
      paint.setColor(Color.BLACK);
      paint2.setStrokeWidth(3f);
      paint2.setColor(Color.BLUE);
      paint3.setColor(Color.LTGRAY);
      paint3.setStrokeWidth(2f);
  }
  
  private float Hesapla(int Yuzde)
  {
      float sonuc;
      sonuc = 500-(500*Yuzde)/100;
      return sonuc;
  }
  
  @Override
  public void onDraw(Canvas canvas)
  {
      super.onDraw(canvas);
      WindowManager wm = (WindowManager)getContext().getSystemService(Context.WINDOW_SERVICE);
      Display ekran = wm.getDefaultDisplay();
      Point olcu = new Point();
      ekran.getSize(olcu);
      int genislik = olcu.x;
      int yukseklik = olcu.y;
      int row = olcu.x/12;
  
      canvas.drawLine(row,0,row,500,paint3);
      canvas.drawLine(row*2,0,row*2,500,paint3);
      canvas.drawLine(row*3,0,row*3,500,paint3);
      canvas.drawLine(row*4,0,row*4,500,paint3);
      canvas.drawLine(row*5,0,row*5,500,paint3);
      canvas.drawLine(row*6,0,row*6,500,paint3);
      canvas.drawLine(row*7,0,row*7,500,paint3);
      canvas.drawLine(row*8,0,row*8,500,paint3);
      canvas.drawLine(row*9,0,row*9,500,paint3);
      canvas.drawLine(row*10,0,row*10,500,paint3);
      canvas.drawLine(row*11,0,row*11,500,paint3);
  
      canvas.drawLine(0,100,genislik,100,paint3);
      canvas.drawLine(0,200,genislik,200,paint3);
      canvas.drawLine(0,300,genislik,300,paint3);
      canvas.drawLine(0,400,genislik,400,paint3);
  
      canvas.drawLine(0,500,row,Hesapla(yuzde[0]),paint2);
      canvas.drawLine(row,Hesapla(yuzde[0]),row*2,Hesapla(yuzde[1]),paint2);
      canvas.drawLine(row*2,Hesapla(yuzde[1]),row*3,Hesapla(yuzde[2]),paint2);
      canvas.drawLine(row*3,Hesapla(yuzde[2]),row*4,Hesapla(yuzde[3]),paint2);
      canvas.drawLine(row*4,Hesapla(yuzde[3]),row*5,Hesapla(yuzde[4]),paint2);
      canvas.drawLine(row*5,Hesapla(yuzde[4]),row*6,Hesapla(yuzde[5]),paint2);
      canvas.drawLine(row*6,Hesapla(yuzde[5]),row*7,Hesapla(yuzde[6]),paint2);
      canvas.drawLine(row*7,Hesapla(yuzde[6]),row*8,Hesapla(yuzde[7]),paint2);
      canvas.drawLine(row*8,Hesapla(yuzde[7]),row*9,Hesapla(yuzde[8]),paint2);
      canvas.drawLine(row*9,Hesapla(yuzde[8]),row*10,Hesapla(yuzde[9]),paint2);
      canvas.drawLine(row*10,Hesapla(yuzde[9]),row*11,Hesapla(yuzde[10]),paint2);
      canvas.drawLine(row*11,Hesapla(yuzde[10]),row*12,Hesapla(yuzde[11]),paint2);
      canvas.drawLine(0,500,genislik,500,paint);
  
  
      }
  }
  </code></pre>
  
  <p><strong><em>Main Activity;</em></strong></p>
  
  <pre><code>import android.graphics.Color;
  import android.support.v7.app.ActionBarActivity;
  import android.os.Bundle;
  import android.view.Menu;
  import android.view.MenuItem;
  
  
  public class MainActivity extends ActionBarActivity {
  
      DwarView drawView;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          drawView = new DwarView(this);
          drawView.setBackgroundColor(Color.WHITE);
          drawView.yuzde = new int[] {10,50,60,30,70,100,50,80,90,10,30,50};
          setContentView(R.layout.activity_main);
      }
  }
  </code></pre>
  
  <p><strong><em>Main Activity Design Xml;</em></strong></p>
  
  <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools" 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" tools:context=".MainActivity"&gt;
      &lt;com.adjans.huskerr.acharttest.DwarView
          android:layout_width="fill_parent"
          android:layout_height="fill_parent"/&gt;
  
  
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p><strong><em>AndroidManifest File;</em></strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.adjans.huskerr.acharttest" &gt;
  
      &lt;application
          android:allowBackup="true"
          android:icon="@mipmap/ic_launcher"
          android:label="@string/app_name"
          android:theme="@style/AppTheme" &gt;
          &lt;activity
              android:name=".MainActivity"
              android:label="@string/app_name" &gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="android.intent.action.MAIN" /&gt;
  
                  &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
              &lt;/intent-filter&gt;
          &lt;/activity&gt;
      &lt;/application&gt;
  
  &lt;/manifest&gt;
  </code></pre>
  
  <p><strong><em>LogCat Logs;</em></strong></p>
  
  <pre><code>24 11:48:18.236  23544-23544/com.adjans.huskerr.acharttest D/dalvikvm﹕ VFY: replacing opcode 0x6f at 0x0000
  02-24 11:48:18.236  23544-23544/com.adjans.huskerr.acharttest I/dalvikvm﹕ Could not find method android.support.v7.internal.widget.ActionBarOverlayLayout.stopNestedScroll, referenced from method android.support.v7.internal.widget.ActionBarOverlayLayout.setHideOnContentScrollEnabled
  02-24 11:48:18.236  23544-23544/com.adjans.huskerr.acharttest W/dalvikvm﹕ VFY: unable to resolve virtual method 9082: Landroid/support/v7/internal/widget/ActionBarOverlayLayout;.stopNestedScroll ()V
  02-24 11:48:18.236  23544-23544/com.adjans.huskerr.acharttest D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x000e
  02-24 11:48:18.241  23544-23544/com.adjans.huskerr.acharttest I/dalvikvm﹕ Could not find method android.content.res.TypedArray.getChangingConfigurations, referenced from method android.support.v7.internal.widget.TintTypedArray.getChangingConfigurations
  02-24 11:48:18.241  23544-23544/com.adjans.huskerr.acharttest W/dalvikvm﹕ VFY: unable to resolve virtual method 366: Landroid/content/res/TypedArray;.getChangingConfigurations ()I
  02-24 11:48:18.241  23544-23544/com.adjans.huskerr.acharttest D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0002
  02-24 11:48:18.246  23544-23544/com.adjans.huskerr.acharttest I/dalvikvm﹕ Could not find method android.content.res.TypedArray.getType, referenced from method android.support.v7.internal.widget.TintTypedArray.getType
  02-24 11:48:18.246  23544-23544/com.adjans.huskerr.acharttest W/dalvikvm﹕ VFY: unable to resolve virtual method 388: Landroid/content/res/TypedArray;.getType (I)I
  02-24 11:48:18.246  23544-23544/com.adjans.huskerr.acharttest D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0002
  02-24 11:48:18.276  23544-23544/com.adjans.huskerr.acharttest D/AndroidRuntime﹕ Shutting down VM
  02-24 11:48:18.276  23544-23544/com.adjans.huskerr.acharttest W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x418f5c08)
  02-24 11:48:18.286  23544-23544/com.adjans.huskerr.acharttest E/AndroidRuntime﹕ FATAL EXCEPTION: main
      Process: com.adjans.huskerr.acharttest, PID: 23544
      java.lang.RuntimeException: Unable to start activity ComponentInfo{com.adjans.huskerr.acharttest/com.adjans.huskerr.acharttest.MainActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class com.adjans.huskerr.acharttest.DwarView
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2436)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2495)
              at android.app.ActivityThread.access$900(ActivityThread.java:170)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1304)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:146)
              at android.app.ActivityThread.main(ActivityThread.java:5635)
              at java.lang.reflect.Method.invokeNative(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:515)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1291)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1107)
              at dalvik.system.NativeStart.main(Native Method)
       Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class com.adjans.huskerr.acharttest.DwarView
              at android.view.LayoutInflater.createView(LayoutInflater.java:609)
              at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:702)
              at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
              at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
              at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
              at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
              at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(ActionBarActivityDelegateBase.java:228)
              at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:102)
              at com.adjans.huskerr.acharttest.MainActivity.onCreate(MainActivity.java:20)
              at android.app.Activity.performCreate(Activity.java:5585)
              at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2400)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2495)
              at android.app.ActivityThread.access$900(ActivityThread.java:170)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1304)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:146)
              at android.app.ActivityThread.main(ActivityThread.java:5635)
              at java.lang.reflect.Method.invokeNative(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:515)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1291)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1107)
              at dalvik.system.NativeStart.main(Native Method)
       Caused by: java.lang.NoSuchMethodException: &lt;init&gt; [class android.content.Context, interface android.util.AttributeSet]
              at java.lang.Class.getConstructorOrMethod(Class.java:472)
              at java.lang.Class.getConstructor(Class.java:446)
              at android.view.LayoutInflater.createView(LayoutInflater.java:574)
              at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:702)
              at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
              at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
              at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
              at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
              at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(ActionBarActivityDelegateBase.java:228)
              at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:102)
              at com.adjans.huskerr.acharttest.MainActivity.onCreate(MainActivity.java:20)
              at android.app.Activity.performCreate(Activity.java:5585)
              at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2400)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2495)
              at android.app.ActivityThread.access$900(ActivityThread.java:170)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1304)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:146)
              at android.app.ActivityThread.main(ActivityThread.java:5635)
              at java.lang.reflect.Method.invokeNative(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:515)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1291)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1107)
              at dalvik.system.NativeStart.main(Native Method)
  </code></pre>