錯誤充氣定製視圖

我有我在哪裏繪製餅圖在畫布餅圖自定義視圖。錯誤充氣定製視圖

我是從它是一個片段內的活動發送餅圖值。

但我得到的錯誤膨脹餡餅chart.I已經試過各種措施，但沒能找到合適的解決方案

我的活動是...

public class PieChart extends View { 
    float valuesForDrawing[]; 
    float valuesForDisplay[]; 
    // private float[] values,valuesForDisplay = new float[] {}; 
    ArrayList<ViewWasTouchedListener> listeners = new ArrayList<ViewWasTouchedListener>(); 

    public void setWasTouchedListener(ViewWasTouchedListener listener) { 
     listeners.add(listener); 
    } 

    private Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); 
    private float[] value_degree; 
    private float[] value_degree_for_display; 
    private float[] angle_list; 
    private int[] COLORS = { Color.BLUE, Color.GREEN, Color.MAGENTA, 
      Color.CYAN, Color.RED }; 
    RectF rectf = new RectF(36, 48, 325, 330); 
    int temp = 0; 

    public PieChart(Context context, float[] values) { 

     super(context); 

     valuesForDrawing = calculateData(values); 
     value_degree = new float[valuesForDrawing.length]; 
     for (int i = 0; i < values.length; i++) { 
      value_degree[i] = values[i]; 

     } 

     valuesForDisplay = calculateDataForDisplay(values); 
     value_degree_for_display = new float[valuesForDisplay.length]; 
     for (int i = 0; i < values.length; i++) { 
      value_degree_for_display[i] = values[i]; 

     } 

    } 

    public PieChart(Context context, AttributeSet attrs, float[] values) { 
     super(context, attrs); 
     valuesForDrawing = calculateData(values); 
     value_degree = new float[valuesForDrawing.length]; 
     for (int i = 0; i < values.length; i++) { 
      value_degree[i] = values[i]; 

     } 

     valuesForDisplay = calculateDataForDisplay(values); 
     value_degree_for_display = new float[valuesForDisplay.length]; 
     for (int i = 0; i < values.length; i++) { 
      value_degree_for_display[i] = values[i]; 

     } 

    } 

    public PieChart(Context context, AttributeSet attrs, int defStyle, 
      float[] values) { 

     super(context, attrs, defStyle); 
     valuesForDrawing = calculateData(values); 
     value_degree = new float[valuesForDrawing.length]; 
     for (int i = 0; i < values.length; i++) { 
      value_degree[i] = values[i]; 

     } 

     valuesForDisplay = calculateDataForDisplay(values); 
     value_degree_for_display = new float[valuesForDisplay.length]; 
     for (int i = 0; i < values.length; i++) { 
      value_degree_for_display[i] = values[i]; 

     } 
    } 

    /* 
    * public void setChartData(float[] datapoints) { this.values = 
    * datapoints.clone(); this.valuesForDisplay = datapoints.clone(); 
    * invalidate(); } 
    */ 

    @Override 
    protected void onDraw(Canvas canvas) { 
     // TODO Auto-generated method stub 
     super.onDraw(canvas); 

     for (int i = 0; i < value_degree.length; i++) {// values2.length; i++) { 
      if (i == 0) { 
       paint.setColor(COLORS[i]); 
       canvas.drawArc(rectf, 0, value_degree[i], true, paint); 
      } else { 
       temp += (int) value_degree[i - 1]; 
       paint.setColor(COLORS[i]); 
       canvas.drawArc(rectf, temp, value_degree[i], true, paint); 
      } 
     } 

     for (ViewWasTouchedListener listener : listeners) { 
      listener.onViewDrawn(value_degree_for_display, COLORS); 
     } 

    } 

    private float[] calculateData(float[] data) { 
     // TODO Auto-generated method stub 
     float total = 0; 
     // float x=0; 
     for (int i = 0; i < data.length; i++) { 
      total += data[i]; 
     } 
     for (int i = 0; i < data.length; i++) { 
      data[i] = 360 * (data[i]/total); 
      // x=x+data[i]; 
     } 
     return data; 

    } 

    private float[] calculateDataForDisplay(float[] data) { 
     // TODO Auto-generated method stub 
     float total = 0; 
     float x = 0; 
     for (int i = 0; i < data.length; i++) { 
      total += data[i]; 
     } 
     for (int i = 0; i < data.length; i++) { 
      data[i] = 360 * (data[i]/total); 
      x = x + data[i]; 
      data[i] = x; 
     } 
     return data; 

    } 

    public float[] getValuesForDrawing() { 
     return valuesForDrawing; 
    } 

    public void setValuesForDrawing(float[] valuesForDrawing) { 
     this.valuesForDrawing = valuesForDrawing; 
    } 

    public float[] getValuesForDisplay() { 
     return valuesForDisplay; 
    } 

    public void setValuesForDisplay(float[] valuesForDisplay) { 
     this.valuesForDisplay = valuesForDisplay; 
    } 

    public ArrayList<ViewWasTouchedListener> getListeners() { 
     return listeners; 
    } 

    public void setListeners(ArrayList<ViewWasTouchedListener> listeners) { 
     this.listeners = listeners; 
    } 

    public Paint getPaint() { 
     return paint; 
    } 

    public void setPaint(Paint paint) { 
     this.paint = paint; 
    } 

    public float[] getValue_degree() { 
     return value_degree; 
    } 

    public void setValue_degree(float[] value_degree) { 
     this.value_degree = value_degree; 
    } 

    public float[] getValue_degree_for_display() { 
     return value_degree_for_display; 
    } 

    public void setValue_degree_for_display(float[] value_degree_for_display) { 
     this.value_degree_for_display = value_degree_for_display; 
    } 

    public float[] getAngle_list() { 
     return angle_list; 
    } 

    public void setAngle_list(float[] angle_list) { 
     this.angle_list = angle_list; 
    } 

    public int[] getCOLORS() { 
     return COLORS; 
    } 

    public void setCOLORS(int[] cOLORS) { 
     COLORS = cOLORS; 
    } 

    public RectF getRectf() { 
     return rectf; 
    } 

    public void setRectf(RectF rectf) { 
     this.rectf = rectf; 
    } 

    public int getTemp() { 
     return temp; 
    } 

    public void setTemp(int temp) { 
     this.temp = temp; 
    } 

     }

我打電話了視圖從本聲明

PieChart customView = new PieChart(getActivity(), values);

其中數值是浮子[] = {-2,7,8,9-，..什麼};

但我得到的錯誤....

 08-19 16:50:12.389: E/AndroidRuntime(27669): FATAL EXCEPTION: main 
08-19 16:50:12.389: E/AndroidRuntime(27669): android.view.InflateException: Binary XML file line #17: Error inflating class com.example.fragmentnewone.PieChart 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.view.LayoutInflater.createView(LayoutInflater.java:589) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.view.LayoutInflater.rInflate(LayoutInflater.java:739) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.view.LayoutInflater.rInflate(LayoutInflater.java:742) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.view.LayoutInflater.inflate(LayoutInflater.java:489) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at com.example.fragmentnewone.PieChartFragment.onCreateView(PieChartFragment.java:50) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.support.v4.app.Fragment.performCreateView(Fragment.java:1460) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:911) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:461) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.support.v4.view.ViewPager.populate(ViewPager.java:1011) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.support.v4.view.ViewPager.populate(ViewPager.java:880) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.support.v4.view.ViewPager$3.run(ViewPager.java:238) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.os.Handler.handleCallback(Handler.java:608) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.os.Handler.dispatchMessage(Handler.java:92) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.os.Looper.loop(Looper.java:156) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.app.ActivityThread.main(ActivityThread.java:5109) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at java.lang.reflect.Method.invokeNative(Native Method) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at java.lang.reflect.Method.invoke(Method.java:511) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:991) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:758) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at dalvik.system.NativeStart.main(Native Method) 
08-19 16:50:12.389: E/AndroidRuntime(27669): Caused by: java.lang.NoSuchMethodException: <init> [class android.content.Context, interface android.util.AttributeSet] 
08-19 16:50:12.389: E/AndroidRuntime(27669): at java.lang.Class.getConstructorOrMethod(Class.java:460) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at java.lang.Class.getConstructor(Class.java:431) 
08-19 16:50:12.389: E/AndroidRuntime(27669): at android.view.LayoutInflater.createView(LayoutInflater.java:561) 
08-19 16:50:12.389: E/AndroidRuntime(27669): ... 26 more

編輯我改變了我的構造和使用setter方法

public void setValues(float[] values) { 
    this.values = values; 
}

設定的值，但我得到的錯誤

08-20 11:35:02.685: E/ViewGroup(14994): ----- NullPointerException ----- 
08-20 11:35:02.685: E/ViewGroup(14994): mChildrenCount = 1, count = 1, i = 0, child = [email protected], mEditChildren = false 
08-20 11:35:02.685: E/ViewGroup(14994): idx = 0, child = [email protected] 
08-20 11:35:02.685: E/ViewGroup(14994): ----- NullPointerException ----- 
08-20 11:35:02.685: E/ViewGroup(14994): mChildrenCount = 3, count = 3, i = 1, child = [email protected], mEditChildren = false 
08-20 11:35:02.685: E/ViewGroup(14994): idx = 0, child = [email protected] 
08-20 11:35:02.685: E/ViewGroup(14994): idx = 1, child = [email protected] 
08-20 11:35:02.685: E/ViewGroup(14994): idx = 2, child = [email protected] 
08-20 11:35:02.685: E/ViewGroup(14994): ----- NullPointerException ----- 
08-20 11:35:02.685: E/ViewGroup(14994): mChildrenCount = 1, count = 1, i = 0, child = [email protected], mEditChildren = false 
08-20 11:35:02.685: E/ViewGroup(14994): idx = 0, child = [email protected] 

My xml is 
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:background="@android:color/black"> 

    <RelativeLayout 
    android:id="@+id/rel" 
    android:layout_width="250dp" 
    android:layout_height="250dp" 
    android:layout_marginTop="50dp" 
    android:layout_marginLeft="40dp" 
    android:orientation="vertical" 
    tools:context=".MainActivity" 
    android:background="#000000"> 

    <com.example.fragmentnewone.PieChart 

     android:id="@+id/graphId" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent"> 

    </com.example.fragmentnewone.PieChart> 


    <ImageView 
     android:src="@drawable/graphic_ring" 
     android:id="@+id/imageView_ring" 
     android:scaleType="matrix" 
     android:layout_height="fill_parent" 
     android:layout_width="fill_parent"> 

    </ImageView> 

    <TextView 
     android:id="@+id/textId" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentBottom="true" 
     android:layout_centerHorizontal="true" 
     android:layout_marginBottom="32dp" 
     android:textStyle="bold" 
     /> 

</RelativeLayout> 
</RelativeLayout>

來源

2013-08-19 user1901079

你需要一個構造函數只是Context和AttributeSet參數。該values參數是無效的，你將有充氣後編程設定值。

例子：

public PieChart(Context context, AttributeSet attrs){ 
    super(context, attrs); 
} 

public void setValues(float[] values){ 
    // Do stuff calculating 
}

來源

2013-08-19 11:24:13 nhaarman

你能否詳細說明如何做到這一點 – user1901079

查看編輯答案 – nhaarman

我這樣做，第二堆棧跟蹤是不完整我的追求 – user1901079

你已經得到：

Caused by: java.lang.NoSuchMethodException: <init> [class android.content.Context, interface android.util.AttributeSet]

存在具有背景下，只有屬性沒有方法。你需要通過所有必需的參數。

public PieChart(Context context, AttributeSet attrs, float[] values) { 
     super(context, attrs,values); 
}

希望它有助於！

來源

2013-08-19 11:33:13

錯誤充氣定製視圖

回答

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