Material Designer的低版本兼容实现(十)—— CheckBox & RadioButton

ChekBox的用途我们就不必多说了,算是一个很古老的控件了,何其类似的还有RadioButton,这个东西因为我目前还没写出来,所以用了别人的一个lib,这下面会说到。顺便说一句,如果你的app是在5.0环境下编译的,那么你用传统的checkbox时,你会发现checkbox在低版本机子上运行出来的样子和以前不同了,虽然没有动画效果,但样子和5.0以上的checkbox还是很像的。

最小尺寸

48 x 48

开源lib中对于不同的屏幕做了不同大小的对勾图片,应该能满足高清屏的要求。至于不可用状态目前还没做,其实也就是继承下isEnable()方法,但是因为做出来的效果我不是很满意,所以就仅仅试了试,没真的放出来。

 

一、导入到自己的工程中

要用这个控件还是得添加开源项目的支持,开源项目地址:

我维护的:https://github.com/shark0017/MaterialDesignLibrary

原版本:https://github.com/navasmdc/MaterialDesignLibrary

大家可以选择一个下载,反正两个版本都是我和原作者融合后的东西,差别不大。

添加lib支持后我们就可以用这个控件了,放入布局文件前还是要写命名空间的。

xmlns:app="http://schemas.android.com/apk/res-auto"

    <com.gc.materialdesign.views.CheckBox
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal" />

由于我没有做可视化的效果,所以在编译器中没办法实时显示状态,默认就是一个透明的view。如果大家想在编译器中看个大概的样子,可以给它通过background=“#xxxxxx”添加个背景颜色。

真实运行的效果:

 

二、在布局文件中设定各种属性

app:checked="true"  是否被选中,默认没被选中

android:background="#ff0000"  设定checkbox的颜色,默认是绿色

android:layout_width="100dp"  设定checkbox这个view整体的大小,和里面的方框无关。注意看图中按压时阴影的大小
android:layout_height="100dp"

app:checkBoxSize="40dp"  设定checkbox里面方框的大小

 

三、通过代码设定各种属性

public class CheckBoxTest extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.checkbox);
        
        CheckBox checkBox = (CheckBox)findViewById(R.id.checkBox01);
        checkBox.setChecked(true);// 设定初始为选中的状态
        
        checkBox.setBackgroundColor(0xffff0000);// 设置checkbox的颜色
        
        checkBox.setBackgroundColor(getResources().getColor(R.color.orange));// 设置背景色

        checkBox.setCheckBoxSize(35.5f);// 设置方框的大小
        
        // 监听选中的事件
        checkBox.setOncheckListener(new OnCheckListener() {
            
            @Override
            public void onCheck(boolean isChecked) {
                // TODO 自动生成的方法存根
                System.out.println("isChecked = "+ checkBox05.isChecked());
                Toast.makeText(CheckBoxTest.this, "checkbox status = "+isChecked, 0).show();
            }
        });
        
    }
}

 

四、补充:RadioButton

这个控件是从另一个开源项目中得到的,那个lib中其他的控件都做的不好,就这个做的十分精细。具体的测试和修改我没去做,下面仅仅给出源码,由大家自行修改吧,其实可以修改的地方还是蛮多的。

lib地址:https://github.com/keithellis/MaterialWidget

源码如下:

dimen.xml

这里是默认的属性,包括长宽啥的,这些值照理说都应该可以在java代码中定制的。

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <!-- RadioButton Default -->
    <dimen name="radio_width">48dp</dimen>
    <dimen name="radio_height">48dp</dimen>
    <dimen name="radio_border_radius">10dp</dimen>
    <dimen name="radio_thumb_radius">6dp</dimen>
    <dimen name="radio_ripple_radius">24dp</dimen>
    <dimen name="radio_stroke_width">2dp</dimen>
    <color name="radio_color">#6d6d6d</color>
    <color name="radio_checked_color">#55b03d</color>
</resources>

可以定制的属性,这里就两个,蛮少的。请大家自行添加修改吧~

        <!-- RadioButton Attribute -->
    <declare-styleable name="RadioButton">
        <attr name="radio_color" format="color"/>
        <attr name="radio_checked_color" format="color"/>
    </declare-styleable>

 

RadioButton.java

从中我们可以看到,这个控件都是被画出来的,和上面控件用到的lib的构建思路不同。因为是画出来的,所以我们可以定制的东西更多,扩展性更强,值得细细品味这个类的写法。

package com.gc.materialdesign.views;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.CompoundButton;

import com.gc.materialdesign.R;

/**
 * Created by IntelliJ IDEA.
 * User: keith.
 * Date: 14-10-8.
 * Time: 15:48.
 */
public class RadioButton extends CompoundButton {

    private static final long ANIMATION_DURATION = 200;// 动画持续的时间
    private static final int StateNormal = 1;
    private static final int StateTouchDown = 2;
    private static final int StateTouchUp = 3;

    private int mState = StateNormal;
    private long mStartTime;
    private int mColor;
    private int mCheckedColor;
    private int mRadioWidth;// 宽度
    private int mRadioHeight;// 高度
    private int mBorderRadius;
    private int mThumbRadius;
    private int mRippleRadius;
    private int mStrokeWidth;
    private Rect mFingerRect;
    private boolean mMoveOutside;

    private Paint borderPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    private Paint thumbPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    private Paint ripplePaint = new Paint(Paint.ANTI_ALIAS_FLAG);

    public RadioButton(Context context) {
        this(context, null);
    }

    public RadioButton(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public RadioButton(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        TypedArray attributes = context.obtainStyledAttributes(attrs, R.styleable.RadioButton);
        mColor = attributes.getColor(R.styleable.RadioButton_radio_color, getResources().getColor(R.color.radio_color));
        mCheckedColor = attributes.getColor(R.styleable.RadioButton_radio_checked_color, getResources().getColor(R.color.radio_checked_color));
        attributes.recycle();
        mRadioWidth = getResources().getDimensionPixelSize(R.dimen.radio_width);
        mRadioHeight = getResources().getDimensionPixelSize(R.dimen.radio_height);
        mBorderRadius = getResources().getDimensionPixelSize(R.dimen.radio_border_radius);
        mThumbRadius = getResources().getDimensionPixelSize(R.dimen.radio_thumb_radius);
        mRippleRadius = getResources().getDimensionPixelSize(R.dimen.radio_ripple_radius);
        mStrokeWidth = getResources().getDimensionPixelSize(R.dimen.radio_stroke_width);

        thumbPaint.setColor(mCheckedColor);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        widthMeasureSpec = MeasureSpec.makeMeasureSpec(measureWidth(widthMeasureSpec), MeasureSpec.EXACTLY);
        heightMeasureSpec = MeasureSpec.makeMeasureSpec(measureHeight(heightMeasureSpec), MeasureSpec.EXACTLY);
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    private int measureWidth(int measureSpec) {
        int result;
        int specMode = MeasureSpec.getMode(measureSpec);
        int specSize = MeasureSpec.getSize(measureSpec);
        if (specMode == MeasureSpec.EXACTLY) {
            if (specSize < mRadioWidth) {
                result = mRadioWidth;
            } else {
                result = specSize;
            }
        } else {
            result = mRadioWidth;
        }
        return result;
    }

    private int measureHeight(int measureSpec) {
        int result;
        int specMode = MeasureSpec.getMode(measureSpec);
        int specSize = MeasureSpec.getSize(measureSpec);
        if (specMode == MeasureSpec.EXACTLY) {
            if (specSize < mRadioHeight) {
                result = mRadioHeight;
            } else {
                result = specSize;
            }
        } else {
            result = mRadioHeight;
        }
        return result;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (isEnabled()) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    mMoveOutside = false;
                    mState = StateTouchDown;
                    mFingerRect = new Rect(getLeft(), getTop(), getRight(), getBottom());
                    mStartTime = System.currentTimeMillis();
                    invalidate();
                    break;
                case MotionEvent.ACTION_MOVE:
                    if (!mFingerRect.contains(getLeft() + (int) event.getX(), getTop() + (int) event.getY())) {
                        mMoveOutside = true;
                        mState = StateNormal;
                        mStartTime = System.currentTimeMillis();
                        invalidate();
                    }
                    break;
                case MotionEvent.ACTION_UP:
                    if (!mMoveOutside) {
                        mState = StateTouchUp;
                        setChecked(!isChecked());
                        mStartTime = System.currentTimeMillis();
                        invalidate();
                    }
                    break;
                case MotionEvent.ACTION_CANCEL:
                    mState = StateNormal;
                    invalidate();
                    break;
            }
        }
        return true;
    }

    private int rippleColor(int color) {
        int alpha = Math.round(Color.alpha(color) * 0.2f);
        int red = Color.red(color);
        int green = Color.green(color);
        int blue = Color.blue(color);
        return Color.argb(alpha, red, green, blue);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        int rippleRadius = 0;
        int thumbRadius = isChecked() ? mThumbRadius : 0;
        long elapsed = System.currentTimeMillis() - mStartTime;
        switch (mState) {
            case StateNormal:
                break;
            case StateTouchDown:
                ripplePaint.setAlpha(255);
                if (elapsed < ANIMATION_DURATION) {
                    rippleRadius = Math.round(elapsed * mRippleRadius / ANIMATION_DURATION);
                } else {
                    rippleRadius = mRippleRadius;
                }
                postInvalidate();
                break;
            case StateTouchUp:
                if (elapsed < ANIMATION_DURATION) {
                    int alpha = Math.round((ANIMATION_DURATION - elapsed) * 255 / ANIMATION_DURATION);
                    ripplePaint.setAlpha(alpha);
                    rippleRadius = Math.round((ANIMATION_DURATION - elapsed) * mRippleRadius / ANIMATION_DURATION);
                    if (isChecked()) {
                        thumbRadius = Math.round(elapsed * mThumbRadius / ANIMATION_DURATION);
                    } else {
                        thumbRadius = Math.round((ANIMATION_DURATION - elapsed) * mThumbRadius / ANIMATION_DURATION);
                    }
                } else {
                    mState = StateNormal;
                    rippleRadius = 0;
                    ripplePaint.setAlpha(0);
                }
                postInvalidate();
                break;
        }
        if (isChecked()) {
            ripplePaint.setColor(rippleColor(mCheckedColor));

            borderPaint.setColor(mCheckedColor);
            borderPaint.setStyle(Paint.Style.STROKE);
            borderPaint.setStrokeWidth(mStrokeWidth);
        } else {
            ripplePaint.setColor(rippleColor(mColor));

            borderPaint.setColor(mColor);
            borderPaint.setStyle(Paint.Style.STROKE);
            borderPaint.setStrokeWidth(mStrokeWidth);
        }
        canvas.drawCircle(getWidth() / 2, getHeight() / 2, rippleRadius, ripplePaint);
        canvas.drawCircle(getWidth() / 2, getHeight() / 2, mBorderRadius, borderPaint);
        canvas.drawCircle(getWidth() / 2, getHeight() / 2, thumbRadius, thumbPaint);
    }
}

 

posted @ 2014-12-06 10:51  developer_Kale  阅读(3837)  评论(2编辑  收藏
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