layout可以显示，程序调用就出错

hackerlyf 2014-09-26 04:09:28
我用网上的ColorPickerDialog控件改成了View控件，希望把ColorPicker控件直接嵌入到layout内，在layout设计界面可以看到View已经显示了，但在MainActivity内使用SetContentView调用后就报错，请大侠帮我查下哪里写得不对；



package com.example.colorpicker;



import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.LinearGradient;

import android.graphics.Paint;

import android.graphics.RectF;

import android.graphics.Shader;

import android.graphics.SweepGradient;

import android.view.View;





public class ColorPickerView extends View {

	private Paint mPaint;//

	private Paint mCenterPaint;//

	private Paint mLinePaint;//

	private Paint mRectPaint;//

	

	private Shader rectShader;//

	private float rectLeft;//

	private float rectTop;//

	private float rectRight;//

	private float rectBottom;//

	private final boolean debug = true;

	private final String TAG = "ColorPicker";

	

	Context context;

	private String title;//

	private int mInitialColor;//

//    private OnColorChangedListener mListener;



	private final int[] mCircleColors;//

	private final int[] mRectColors;//

	

	private int mHeight;//

	private int mWidth;//

	private float r;//

	private float centerRadius;//

	

	private boolean downInCircle = true;//

	private boolean downInRect;//

	private boolean highlightCenter;//

	private boolean highlightCenterLittle;//

	

//	public ColorPickerView(Context context, int height, int width) {

	public ColorPickerView(Context context) {

		super(context);

		int height = 400;

		int width = 500;

		this.mHeight = height - 36;

		this.mWidth = width;

		setMinimumHeight(height - 36);

		setMinimumWidth(width);

		

    	mCircleColors = new int[] {0xFFFF0000, 0xFFFF00FF, 0xFF0000FF, 

    			0xFF00FFFF, 0xFF00FF00,0xFFFFFF00, 0xFFFF0000};

    	Shader s = new SweepGradient(0, 0, mCircleColors, null);

        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

        mPaint.setShader(s);

        mPaint.setStyle(Paint.Style.STROKE);

        mPaint.setStrokeWidth(50);

        r = width / 2 * 0.7f - mPaint.getStrokeWidth() * 0.5f;

        

    

        mCenterPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

        mCenterPaint.setColor(mInitialColor);

        mCenterPaint.setStrokeWidth(5);

        centerRadius = (r - mPaint.getStrokeWidth() / 2 ) * 0.7f;

        



        mLinePaint = new Paint(Paint.ANTI_ALIAS_FLAG);

        mLinePaint.setColor(Color.parseColor("#72A1D1"));

        mLinePaint.setStrokeWidth(4);

        



        mRectColors = new int[]{0xFF000000, mCenterPaint.getColor(), 0xFFFFFFFF};

        mRectPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

        mRectPaint.setStrokeWidth(5);

        rectLeft = -r - mPaint.getStrokeWidth() * 0.5f;

        rectTop = r + mPaint.getStrokeWidth() * 0.5f + 

        		mLinePaint.getStrokeMiter() * 0.5f + 15;

        rectRight = r + mPaint.getStrokeWidth() * 0.5f;

        rectBottom = rectTop + 50;

	}



	private void init()

	{

		

	}

	@Override

	protected void onDraw(Canvas canvas) {



        canvas.translate(mWidth / 2, mHeight / 2 - 50);



        canvas.drawCircle(0, 0, centerRadius,  mCenterPaint);



        if (highlightCenter || highlightCenterLittle) {

            int c = mCenterPaint.getColor();

            mCenterPaint.setStyle(Paint.Style.STROKE);

            if(highlightCenter) {

            	mCenterPaint.setAlpha(0xFF);

            }else if(highlightCenterLittle) {

            	mCenterPaint.setAlpha(0x90);

            }

            canvas.drawCircle(0, 0, 

            		centerRadius + mCenterPaint.getStrokeWidth(),  mCenterPaint);

            

            mCenterPaint.setStyle(Paint.Style.FILL);

            mCenterPaint.setColor(c);

        }



        canvas.drawOval(new RectF(-r, -r, r, r), mPaint);



        if(downInCircle) {

        	mRectColors[1] = mCenterPaint.getColor();

        }

        rectShader = new LinearGradient(rectLeft, 0, rectRight, 0, mRectColors, null, Shader.TileMode.MIRROR);

        mRectPaint.setShader(rectShader);

        canvas.drawRect(rectLeft, rectTop, rectRight, rectBottom, mRectPaint);

        float offset = mLinePaint.getStrokeWidth() / 2;

        canvas.drawLine(rectLeft - offset, rectTop - offset * 2, 

        		rectLeft - offset, rectBottom + offset * 2, mLinePaint);//?·|

        canvas.drawLine(rectLeft - offset * 2, rectTop - offset, 

        		rectRight + offset * 2, rectTop - offset, mLinePaint);//???

        canvas.drawLine(rectRight + offset, rectTop - offset * 2, 

        		rectRight + offset, rectBottom + offset * 2, mLinePaint);//??3

        canvas.drawLine(rectLeft - offset * 2, rectBottom + offset, 

        		rectRight + offset * 2, rectBottom + offset, mLinePaint);//???

		super.onDraw(canvas);

	}

	



	@Override

	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

		super.onMeasure(mWidth, mHeight);

	}





	private boolean inColorCircle(float x, float y, float outRadius, float inRadius) {

		double outCircle = Math.PI * outRadius * outRadius;

		double inCircle = Math.PI * inRadius * inRadius;

		double fingerCircle = Math.PI * (x * x + y * y);

		if(fingerCircle < outCircle && fingerCircle > inCircle) {

			return true;

		}else {

			return false;

		}

	}

	



	private boolean inCenter(float x, float y, float centerRadius) {

		double centerCircle = Math.PI * centerRadius * centerRadius;

		double fingerCircle = Math.PI * (x * x + y * y);

		if(fingerCircle < centerCircle) {

			return true;

		}else {

			return false;

		}

	}

	



	private boolean inRect(float x, float y) {

		if( x <= rectRight && x >=rectLeft && y <= rectBottom && y >=rectTop) {

			return true;

		} else {

			return false;

		}

	}



	private int interpCircleColor(int colors[], float unit) {

        if (unit <= 0) {

            return colors[0];

        }

        if (unit >= 1) {

            return colors[colors.length - 1];

        }

        

        float p = unit * (colors.length - 1);

        int i = (int)p;

        p -= i;



        // now p is just the fractional part [0...1) and i is the index

        int c0 = colors[i];

        int c1 = colors[i+1];

        int a = ave(Color.alpha(c0), Color.alpha(c1), p);

        int r = ave(Color.red(c0), Color.red(c1), p);

        int g = ave(Color.green(c0), Color.green(c1), p);

        int b = ave(Color.blue(c0), Color.blue(c1), p);

        

        return Color.argb(a, r, g, b);

    }

	

	private int interpRectColor(int colors[], float x) {

		int a, r, g, b, c0, c1;

    	float p;

    	if (x < 0) {

    		c0 = colors[0]; 

    		c1 = colors[1];

    		p = (x + rectRight) / rectRight;

    	} else {

    		c0 = colors[1];

    		c1 = colors[2];

    		p = x / rectRight;

    	}

    	a = ave(Color.alpha(c0), Color.alpha(c1), p);

    	r = ave(Color.red(c0), Color.red(c1), p);

    	g = ave(Color.green(c0), Color.green(c1), p);

    	b = ave(Color.blue(c0), Color.blue(c1), p);

    	return Color.argb(a, r, g, b);

	}

	

	private int ave(int s, int d, float p) {

        return s + Math.round(p * (d - s));

    }





public String getTitle() {

	return title;

}



public void setTitle(String title) {

	this.title = title;

}



public int getmInitialColor() {

	return mInitialColor;

}



public void setmInitialColor(int mInitialColor) {

	this.mInitialColor = mInitialColor;

}

}
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hackerlyf 2014-09-27
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已经解决了，非常感谢；
hackerlyf 2014-09-27
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引用 11 楼 birdsaction 的回复:
public ColorPickerView(Context context, AttributeSet attributeSet) { super(context,attributeSet); ColorPickerView(context);//................................... } ColorPickerView(context) 你不是说你写了这个构造函数了么。
是写了，代码见顶楼； 在public ColorPickerView(Context context, AttributeSet attributeSet)内增加ColorPickerview(context)；语句后，提示ColorPickerView方法没有定义，根据错误点击创建这个方法后，会自动创建以下方法： private void ColorPickerView(Context context) { // TODO Auto-generated method stub }
Birds2018 2014-09-27
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public ColorPickerView(Context context, AttributeSet attributeSet) { super(context,attributeSet); ColorPickerView(context);//................................... } ColorPickerView(context) 你不是说你写了这个构造函数了么。
hackerlyf 2014-09-26
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引用 9 楼 birdsaction 的回复:
public ColorPickerView(Context context, AttributeSet attributeSet) { this.ColorPickerView(context);//这样写 }
刚试了下，这么写会报错，this内找不到ColorPickerView的对象；
Birds2018 2014-09-26
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public ColorPickerView(Context context, AttributeSet attributeSet) { this.ColorPickerView(context);//这样写 }
hackerlyf 2014-09-26
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引用 7 楼 birdsaction 的回复:
异常很明显是没有构造函数。 public ColorPickerView(Context context, AttributeSet attributeSet) Caused by: java.lang.NoSuchMethodException: <init> [class android.content.Context, interface android.util.AttributeSet]
确实是，需要怎么改？只是public ColorPickerView(Context context)改成public ColorPickerView(Context context, AttributeSet attributeSet)就可以了吗？
Birds2018 2014-09-26
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异常很明显是没有构造函数。 public ColorPickerView(Context context, AttributeSet attributeSet) Caused by: java.lang.NoSuchMethodException: <init> [class android.content.Context, interface android.util.AttributeSet]
hackerlyf 2014-09-26
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以下是报错的日志，没看懂： 09-26 04:26:48.720: E/AndroidRuntime(1524): FATAL EXCEPTION: main 09-26 04:26:48.720: E/AndroidRuntime(1524): Process: com.example.colorpicker, PID: 1524 09-26 04:26:48.720: E/AndroidRuntime(1524): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.colorpicker/com.example.colorpicker.ColorPickerActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class com.example.colorpicker.ColorPickerView 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2176) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2226) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.app.ActivityThread.access$700(ActivityThread.java:135) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1397) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.os.Handler.dispatchMessage(Handler.java:102) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.os.Looper.loop(Looper.java:137) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.app.ActivityThread.main(ActivityThread.java:4998) 09-26 04:26:48.720: E/AndroidRuntime(1524): at java.lang.reflect.Method.invokeNative(Native Method) 09-26 04:26:48.720: E/AndroidRuntime(1524): at java.lang.reflect.Method.invoke(Method.java:515) 09-26 04:26:48.720: E/AndroidRuntime(1524): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777) 09-26 04:26:48.720: E/AndroidRuntime(1524): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593) 09-26 04:26:48.720: E/AndroidRuntime(1524): at dalvik.system.NativeStart.main(Native Method) 09-26 04:26:48.720: E/AndroidRuntime(1524): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class com.example.colorpicker.ColorPickerView 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.view.LayoutInflater.createView(LayoutInflater.java:603) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 09-26 04:26:48.720: E/AndroidRuntime(1524): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:290) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.app.Activity.setContentView(Activity.java:1928) 09-26 04:26:48.720: E/AndroidRuntime(1524): at com.example.colorpicker.ColorPickerActivity.onCreate(ColorPickerActivity.java:51) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.app.Activity.performCreate(Activity.java:5243) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2140) 09-26 04:26:48.720: E/AndroidRuntime(1524): ... 11 more 09-26 04:26:48.720: E/AndroidRuntime(1524): Caused by: java.lang.NoSuchMethodException: <init> [class android.content.Context, interface android.util.AttributeSet] 09-26 04:26:48.720: E/AndroidRuntime(1524): at java.lang.Class.getConstructorOrMethod(Class.java:472) 09-26 04:26:48.720: E/AndroidRuntime(1524): at java.lang.Class.getConstructor(Class.java:446) 09-26 04:26:48.720: E/AndroidRuntime(1524): at android.view.LayoutInflater.createView(LayoutInflater.java:568) 09-26 04:26:48.720: E/AndroidRuntime(1524): ... 22 more
hackerlyf 2014-09-26
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引用 4 楼 birdsaction 的回复:
我记得如果你把这个view放到布局里面 ，你需要有这个构造函数。 public ColorPickerView(Context context, AttributeSet attributeSet)
我用public ColorPickerView(Context context)替代了；
Birds2018 2014-09-26
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我记得如果你把这个view放到布局里面 ，你需要有这个构造函数。 public ColorPickerView(Context context, AttributeSet attributeSet)
hackerlyf 2014-09-26
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以下是Layout的代码； 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/background"
    android:orientation="vertical" >

    <com.example.colorpicker.ColorPickerView
        android:id="@+id/colorpicker4"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

</LinearLayout>
Jing丶無雙 2014-09-26
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你能把相应layout的XML文件贴出来么
taugnan 2014-09-26
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看看错误log是什么，就知道哪里错了。
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