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  • GridLayout 使用

    上次做了一个小键盘,请见:PopupWindow 使用

    效果是这样的:

    11_thumb1

    可以看到,上面的按键是不一样大小的。因为是用LinearLayout布局,用的Button样式也是默认的。数字键和文字键的大小不一致。

    为了使按键大小一致,并且定制Button样式,决定改用GridLayout实现。过程如下:

    1.GridLayout

    布局文件如下:

    <?xml version="1.0" encoding="utf-8"?>
    <android.support.v7.widget.GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/pinpad_dialog"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:columnCount="3"
        app:orientation="horizontal"
        app:rowCount="6">
    
        <Button
            android:id="@+id/btnUp"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_btn_func_style"
            android:gravity="center"
            android:soundEffectsEnabled="true"
            android:text="@string/up_arrow"
            android:textSize="26sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btnDown"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_btn_func_style"
            android:soundEffectsEnabled="true"
            android:text="@string/down_arrow"
            android:textSize="26sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btnMenu"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_btn_func_style"
            android:soundEffectsEnabled="true"
            android:text="Menu"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btn1"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_button_style"
            android:soundEffectsEnabled="true"
            android:text="1"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btn2"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_button_style"
            android:soundEffectsEnabled="true"
            android:text="2"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btn3"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_button_style"
            android:soundEffectsEnabled="true"
            android:text="3"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btn4"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_button_style"
            android:soundEffectsEnabled="true"
            android:text="4"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btn5"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_button_style"
            android:soundEffectsEnabled="true"
            android:text="5"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btn6"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_button_style"
            android:soundEffectsEnabled="true"
            android:text="6"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btn7"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_button_style"
            android:soundEffectsEnabled="true"
            android:text="7"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btn8"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_button_style"
            android:soundEffectsEnabled="true"
            android:text="8"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btn9"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_button_style"
            android:soundEffectsEnabled="true"
            android:text="9"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btnFunc"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_btn_func_style"
            android:soundEffectsEnabled="true"
            android:text="Func"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btn0"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_button_style"
            android:soundEffectsEnabled="true"
            android:text="0"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btnAlpha"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_btn_clear_style"
            android:soundEffectsEnabled="true"
            android:text="Alpha"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btnCancel"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_btn_cancel_style"
            android:soundEffectsEnabled="true"
            android:text="Cancel"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btnClear"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_btn_clear_style"
            android:soundEffectsEnabled="true"
            android:text="Clear"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
        <Button
            android:id="@+id/btnEnter"
            android:layout_height="30dp"
            android:layout_margin="3dp"
            android:background="@drawable/key_btn_enter_style"
            android:soundEffectsEnabled="true"
            android:text="Enter"
            android:textSize="20sp"
            app:layout_columnWeight="1"
            app:layout_rowWeight="1" />
    
    </android.support.v7.widget.GridLayout>
    View Code

    这里说明几点:

    (1)android.support.v7.widget.GridLayout

    这里用的是V7包中的GridLayout,因为在当前开发的应用中,设置minSdkVersion是19。
    而下面要用到的两个属性,在一般的GridLayout中需要API21才能使用。
    在AndroidStudio中,默认是还没有下载兼容包的控件的,在design模式下,点击相应的AppCompat控件,下载即可。
    image

    (2)使GridLayout的子元素平分屏幕

    需要用下面的这两个属性。

    app:layout_columnWeight="1" 
    
    app:layout_rowWeight="1" 

    具体参考:Android的GridLayout的子元素如何平分屏幕

    2.自定义button样式

    (1)自定义的drawable

    key_button_pressed.xml

    <?xml version="1.0" encoding="utf-8"?>
    <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
        <item>
            <shape android:shape="rectangle">
                <solid android:color="#656462" />
                <corners
                    android:bottomLeftRadius="5dp"
                    android:bottomRightRadius="5dp"
                    android:topLeftRadius="5dp"
                    android:topRightRadius="5dp" />
            </shape>
        </item>
        <item
            android:bottom="1px"
            android:left="1px"
            android:right="1px"
            android:top="1px">
            <shape>
                <gradient
                    android:angle="90"
                    android:centerX="0.5"
                    android:centerY="0.5"
                    android:endColor="#fbf8f4"
                    android:startColor="#7b7b79"
                    android:type="linear" />
                <corners
                    android:bottomLeftRadius="5dp"
                    android:bottomRightRadius="5dp"
                    android:topLeftRadius="5dp"
                    android:topRightRadius="5dp" />
            </shape>
        </item>
    </layer-list>
    View Code

    key_button_default.xml

    <?xml version="1.0" encoding="utf-8"?>
    <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
        <item>
            <shape android:shape="rectangle">
                <solid android:color="#656462" />
                <corners
                    android:bottomLeftRadius="5dp"
                    android:bottomRightRadius="5dp"
                    android:topLeftRadius="5dp"
                    android:topRightRadius="5dp" />
            </shape>
        </item>
        <item
            android:bottom="1px"
            android:left="1px"
            android:right="1px"
            android:top="1px">
            <shape>
                <gradient
                    android:angle="90"
                    android:centerX="0.5"
                    android:centerY="0.5"
                    android:endColor="#fbf8f4"
                    android:startColor="#656462"
                    android:type="linear" />
                <corners
                    android:bottomLeftRadius="5dp"
                    android:bottomRightRadius="5dp"
                    android:topLeftRadius="5dp"
                    android:topRightRadius="5dp" />
            </shape>
        </item>
    </layer-list>
    View Code

    (2)自定义的selector

    key_button_style.xml

    <?xml version="1.0" encoding="utf-8"?>
    <selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:drawable="@drawable/key_button_pressed" android:state_pressed="true" />
        <item android:drawable="@drawable/key_button_default" />
    </selector>
    View Code

    在上面这个selector中,就用到上面的两个drawable文件。

    key_btn_cancel_style.xml

    <?xml version="1.0" encoding="utf-8"?>
    <selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_pressed="true">
            <shape android:shape="rectangle">
                <solid android:color="#e7352c" />
                <corners android:bottomLeftRadius="5dp" android:bottomRightRadius="5dp" android:topLeftRadius="5dp" android:topRightRadius="5dp" />
            </shape>
        </item>
        <item>
            <shape android:shape="rectangle">
                <solid android:color="#da2219" />
                <corners android:bottomLeftRadius="5dp" android:bottomRightRadius="5dp" android:topLeftRadius="5dp" android:topRightRadius="5dp" />
            </shape>
        </item>
    </selector>
    View Code

    key_btn_func_style.xml

    <?xml version="1.0" encoding="utf-8"?>
    <selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_pressed="true">
            <shape android:shape="rectangle">
                <solid android:color="#2a7afb" />
                <corners android:bottomLeftRadius="5dp" android:bottomRightRadius="5dp" android:topLeftRadius="5dp" android:topRightRadius="5dp" />
            </shape>
        </item>
        <item>
            <shape android:shape="rectangle">
                <solid android:color="#126af9" />
                <corners android:bottomLeftRadius="5dp" android:bottomRightRadius="5dp" android:topLeftRadius="5dp" android:topRightRadius="5dp" />
            </shape>
        </item>
    </selector>
    View Code

    key_btn_enter_style.xml

    <?xml version="1.0" encoding="utf-8"?>
    <selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_pressed="true">
            <shape android:shape="rectangle">
                <solid android:color="#4de947" />
                <corners android:bottomLeftRadius="5dp" android:bottomRightRadius="5dp" android:topLeftRadius="5dp" android:topRightRadius="5dp" />
            </shape>
        </item>
        <item>
            <shape android:shape="rectangle">
                <solid android:color="#2ac824" />
                <corners android:bottomLeftRadius="5dp" android:bottomRightRadius="5dp" android:topLeftRadius="5dp" android:topRightRadius="5dp" />
            </shape>
        </item>
    </selector>
    View Code

    key_btn_clear_style.xml

    <?xml version="1.0" encoding="utf-8"?>
    <selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_pressed="true">
            <shape android:shape="rectangle">
                <solid android:color="#f2992d" />
                <corners android:bottomLeftRadius="5dp" android:bottomRightRadius="5dp" android:topLeftRadius="5dp" android:topRightRadius="5dp" />
            </shape>
        </item>
        <item>
            <shape android:shape="rectangle">
                <solid android:color="#f78a04" />
                <corners android:bottomLeftRadius="5dp" android:bottomRightRadius="5dp" android:topLeftRadius="5dp" android:topRightRadius="5dp" />
            </shape>
        </item>
    </selector>
    View Code

    (3)将selector应用到button中

    android:background="@drawable/key_btn_enter_style"
    将Button的background属性,设置为相应的selector即可。

    3.其他

    在设置颜色的时候,一度找不到取色器。
    原来只要点击xml文件左侧的颜色即可,参考下图:
    image

    4.效果

    下面是以上GridLayout和自定义Button的效果图:

    image

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  • 原文地址:https://www.cnblogs.com/tt2015-sz/p/6203862.html
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