[置顶] Android GradientDrawable高级应用 以后完全用不上美工了([置顶]bilinovel)

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先看截图 1图为自定义的Textview 2、3图为点击效果

具体实现如下：

1. 定义自定义控件属性

<declare-styleable name="ShapeTextview"> <attr name="touchSolidColor" format="color" /> <attr name="solidColor" format="color" /> <attr name="cornesRadius" format="dimension" /> <attr name="topLeftRadius" format="dimension" /> <attr name="topRightRadius" format="dimension" /> <attr name="bottomLeftRadius" format="dimension" /> <attr name="bottomRightRadius" format="dimension" /> <attr name="stroke_Width" format="dimension" /> <attr name="stroke_Color" format="color" /> <attr name="strokeDashWidth" format="dimension" /> <attr name="strokeDashGap" format="dimension" /> <attr name="gradientStartColor" format="color" /> <attr name="gradientEndColor" format="color" /> <attr name="gradientCenterColor" format="color" /> <attr name="gradientUseLevel" format="boolean" /> <attr name="gradientAngle" format="dimension" /> <attr name="gradientOrientation"> <enum name="BL_TR" value="0" /> <enum name="BOTTOM_TOP" value="1" /> <enum name="BR_TL" value="2" /> <enum name="LEFT_RIGHT" value="3" /> <enum name="RIGHT_LEFT" value="4" /> <enum name="TL_BR" value="5" /> <enum name="TOP_BOTTOM" value="6" /> <enum name="TR_BL" value="7" /> </attr> <attr name="shapeType"> <enum name="LINEAR_GRADIENT" value="0" /> <enum name="OVAL" value="1" /> <enum name="LINE" value="2" /> <enum name="RING" value="3" /> </attr> <attr name="gradientType"> <enum name="linear" value="0" /> <enum name="radial" value="1" /> <enum name="sweep" value="2" /> </attr> <attr name="gradientRadius" format="dimension" /> </declare-styleable>

2. 控件代码

package com.klower.component;

import android.content.Context;import android.content.res.TypedArray;import android.graphics.Color;import android.graphics.drawable.GradientDrawable;import android.util.AttributeSet;import android.view.MotionEvent;import android.widget.TextView;

import com.klower.R;

public class ShapeTextView extends TextView {

int solidColor, stroke_Color, gradientStartColor, gradientEndColor, gradientCenterColor, touchColor;

int cornesRadius, topLeftRadius, topRightRadius, bottomLeftRadius, bottomRightRadius, stroke_Width, strokeDashWidth, strokeDashGap, gradientAngle, gradientRadius, gradientType, gradientOrientation, shapeType; boolean gradientUseLevel;

GradientDrawable gradientDrawable;

public ShapeTextView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); }

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

public ShapeTextView(Context context) { super(context); }

private void initData(Context context, AttributeSet attrs) { TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ShapeTextview); solidColor = a.getColor(R.styleable.ShapeTextview_solidColor, Color.TRANSPARENT); stroke_Color = a.getColor(R.styleable.ShapeTextview_stroke_Color, Color.TRANSPARENT); gradientStartColor = a .getColor(R.styleable.ShapeTextview_gradientStartColor, Color.TRANSPARENT); gradientEndColor = a.getColor( R.styleable.ShapeTextview_gradientEndColor, Color.TRANSPARENT); gradientCenterColor = a.getColor( R.styleable.ShapeTextview_gradientCenterColor, Color.TRANSPARENT); touchColor = a.getColor(R.styleable.ShapeTextview_touchSolidColor, Color.TRANSPARENT);

cornesRadius = (int) a.getDimension( R.styleable.ShapeTextview_cornesRadius, 0); topLeftRadius = (int) a.getDimension( R.styleable.ShapeTextview_topLeftRadius, 0); topRightRadius = (int) a.getDimension( R.styleable.ShapeTextview_topRightRadius, 0); bottomLeftRadius = (int) a.getDimension( R.styleable.ShapeTextview_bottomLeftRadius, 0); bottomRightRadius = (int) a.getDimension( R.styleable.ShapeTextview_bottomRightRadius, 0); stroke_Width = (int) a.getDimension( R.styleable.ShapeTextview_stroke_Width, 0); strokeDashWidth = (int) a.getDimension( R.styleable.ShapeTextview_strokeDashWidth, 0); strokeDashGap = (int) a.getDimension( R.styleable.ShapeTextview_strokeDashGap, 0); gradientAngle = (int) a.getDimension( R.styleable.ShapeTextview_gradientAngle, 0); gradientRadius = (int) a.getDimension( R.styleable.ShapeTextview_gradientRadius, 0); gradientUseLevel = a.getBoolean( R.styleable.ShapeTextview_gradientUseLevel, false); gradientType = a.getInt(R.styleable.ShapeTextview_gradientType, -1); gradientOrientation = a.getInt( R.styleable.ShapeTextview_gradientOrientation, -1); shapeType = a.getInt( R.styleable.ShapeTextview_shapeType, -1); gradientDrawable = new GradientDrawable(); gradientDrawable.setStroke(stroke_Width, stroke_Color, strokeDashWidth, strokeDashGap); // 如果设定的有Orientation 就默认为是渐变色的Button，否则就是纯色的Button if (gradientOrientation != -1) { gradientDrawable .setOrientation(getOrientation(gradientOrientation)); gradientDrawable.setColors(new int[] { gradientStartColor, gradientCenterColor, gradientEndColor }); } else { gradientDrawable.setColor(solidColor); } if(shapeType != -1){ gradientDrawable.setShape(shapeType); } //是否为圆形 if(shapeType != GradientDrawable.OVAL){ // 如果设定的有Corner Radius就认为是4个角一样的Button， 否则就是4个不一样的角 Button if (cornesRadius != 0) { gradientDrawable.setCornerRadius(cornesRadius); } else { //1、2两个参数表示左上角，3、4表示右上角，5、6表示右下角，7、8表示左下角 gradientDrawable.setCornerRadii(new float[] { topLeftRadius, topLeftRadius, topRightRadius, topRightRadius, bottomRightRadius, bottomRightRadius, bottomLeftRadius, bottomLeftRadius }); } } if (gradientUseLevel) gradientDrawable.setUseLevel(gradientUseLevel); if (gradientType != -1) gradientDrawable.setGradientType(gradientType); gradientDrawable.setGradientRadius(gradientRadius); setBackground(gradientDrawable);

}

@Override public boolean onTouchEvent(MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_DOWN) { if (touchColor != Color.TRANSPARENT) { gradientDrawable.setColor(touchColor); setBackground(gradientDrawable); postInvalidate(); } } else if (event.getAction() == MotionEvent.ACTION_UP || event.getAction() == MotionEvent.ACTION_CANCEL) { if (touchColor != Color.TRANSPARENT) { gradientDrawable.setColor(solidColor); setBackground(gradientDrawable); } } return super.onTouchEvent(event); }

private GradientDrawable.Orientation getOrientation(int gradientOrientation) { GradientDrawable.Orientation orientation = null; switch (gradientOrientation) { case 0: orientation = GradientDrawable.Orientation.BL_TR; break; case 1: orientation = GradientDrawable.Orientation.BOTTOM_TOP; break; case 2: orientation = GradientDrawable.Orientation.BR_TL; break; case 3: orientation = GradientDrawable.Orientation.LEFT_RIGHT; break; case 4: orientation = GradientDrawable.Orientation.RIGHT_LEFT; break; case 5: orientation = GradientDrawable.Orientation.TL_BR; break; case 6: orientation = GradientDrawable.Orientation.TOP_BOTTOM; break; case 7: orientation = GradientDrawable.Orientation.TR_BL; break; } return orientation; }

}

3. xml 加上这句xmlns:flatui="

<!-- flatui:strokeDashGap="5dp" flatui:strokeDashWidth="5dp" flatui:gradientOrientation = "BOTTOM_TOP" -->

<com.klower.component.ShapeTextView android:id="@&#;id/shapetextview" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="dp" android:gravity="center" android:padding="5dp" android:text="ShapeTextview" android:textSize="sp" flatui:bottomLeftRadius="dp" flatui:bottomRightRadius="0dp" flatui:gradientCenterColor="#" flatui:gradientEndColor="#DE0E" flatui:gradientStartColor="#DB1E" flatui:solidColor="#DC" flatui:stroke_Color="#DB1E" flatui:stroke_Width="2dp" flatui:topLeftRadius="0dp" flatui:topRightRadius="dp" flatui:touchSolidColor="#F5B2B9" /> <com.klower.component.ShapeTextView flatui:strokeDashGap="5dp" flatui:strokeDashWidth="5dp" android:id="@&#;id/shapetextview1" android:layout_width="dp" android:layout_height="dp" android:layout_margin="dp" android:gravity="center" android:padding="5dp" android:text="ORAL" android:textSize="sp" flatui:gradientCenterColor="#" flatui:gradientEndColor="#DE0E" flatui:gradientStartColor="#DB1E" flatui:solidColor="#DC" flatui:stroke_Color="#DB1E" flatui:stroke_Width="2dp" flatui:shapeType = "OVAL" flatui:touchSolidColor="#F5B2B9" />

具体效果可以自己可以看源码 然后调试属性 只要你想要做出的效果基本都可以实现

有问题可以留言

Services 翻译第二集 原文地址：

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