教你自己写Android第三方库

来源：互联网发布：javlib最新域名 2016 编辑：程序博客网时间：2024/06/08 11:43

其实Android studio的出现很大程度上方便了我们Android开发人员，今天我们说说怎么构建我们自己的库。

依次按File->New Moudle->android Library就好了，这就构建了我们自己的第三方库，正好最近项目用到了沉侵式状态栏，我们就以这个未为例子来说明吧。

1，新建我们自己的Library

2，编写库库代码

这里比较简单，就是实现一个简单的沉侵式状态栏。沉侵式状态栏默认支持到4.4版本（5.0以后是系统默认支持的，对于5.0之前的是通过绘制一个和状态栏大小相等的矩形）。

 public static void setColor(Activity activity, int color, int statusBarAlpha) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {            activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            activity.getWindow().setStatusBarColor(calculateStatusColor(color, statusBarAlpha));        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            // 生成一个状态栏大小的矩形            View statusView = createStatusBarView(activity, color, statusBarAlpha);            // 添加 statusView 到布局中            ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();            decorView.addView(statusView);            setRootView(activity);        }    }

对于5.0及以上版本，我们直接调用Winows的setStatusBarColor（）即可。

activity.getWindow().setStatusBarColor(calculateStatusColor(color, statusBarAlpha));

这里有一个方法是技术状态栏的颜色。返回int

 private static int calculateStatusColor(int color, int alpha) {        float a = 1 - alpha / 255f;        int red = color >> 16 & 0xff;        int green = color >> 8 & 0xff;        int blue = color & 0xff;        red = (int) (red * a + 0.5);        green = (int) (green * a + 0.5);        blue = (int) (blue * a + 0.5);        return 0xff << 24 | red << 16 | green << 8 | blue;    }

而对于5.0以下的版本，是通过绘制一个和状态栏一样的矩形。然后将这个view添加到Window容器中

  private static View createStatusBarView(Activity activity, int color, int alpha) {        View statusBarView = new View(activity);        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,                getStatusBarHeight(activity));        statusBarView.setLayoutParams(params);        statusBarView.setBackgroundColor(calculateStatusColor(color, alpha));        return statusBarView;    }

这里有一个核心的方法：

  private static void setRootView(Activity activity) {        ViewGroup rootView = (ViewGroup) ((ViewGroup) activity.findViewById(android.R.id.content)).getChildAt(0);        rootView.setFitsSystemWindows(true);        rootView.setClipToPadding(true);    }

3,.1设置透明度

 public static void setTranslucent(Activity activity, int statusBarAlpha) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        setTransparent(activity);        addTranslucentView(activity, statusBarAlpha);    }

同上这里也是分5.0以上和以下的

 private static void transparentStatusBar(Activity activity) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {            activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);            activity.getWindow().setStatusBarColor(Color.TRANSPARENT);        } else {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);        }    }

最后贴上全部代码：

public class TintBarUtil {    //alpha(0-255)    public static final int DEFAULT_STATUS_BAR_ALPHA = 112;    /**     * 设置状态栏颜色     */    public static void setColor(Activity activity, int color) {        setColor(activity, color, DEFAULT_STATUS_BAR_ALPHA);    }    /**     * 设置状态栏颜色     */    public static void setColor(Activity activity, int color, int statusBarAlpha) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {            activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            activity.getWindow().setStatusBarColor(calculateStatusColor(color, statusBarAlpha));        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            // 生成一个状态栏大小的矩形            View statusView = createStatusBarView(activity, color, statusBarAlpha);            // 添加 statusView 到布局中            ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();            decorView.addView(statusView);            setRootView(activity);        }    }    /**     * 设置状态栏纯色 不加半透明效果     */    public static void setColorNoTranslucent(Activity activity, int color) {        setColor(activity, color, 0);    }    /**     * 设置状态栏颜色(5.0以下无半透明效果,不建议使用)     */    public static void setColorHalf(Activity activity, int color) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);        // 生成一个状态栏大小的矩形        View statusView = createStatusBarView(activity, color);        // 添加 statusView 到布局中        ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();        decorView.addView(statusView);        setRootView(activity);    }    /**     * 使状态栏半透明     * 适用于图片作为背景的界面,此时需要图片填充到状态栏     */    public static void setTranslucent(Activity activity) {        setTranslucent(activity, DEFAULT_STATUS_BAR_ALPHA);    }    /**     * 使状态栏半透明     * 适用于图片作为背景的界面,此时需要图片填充到状态栏     */    public static void setTranslucent(Activity activity, int statusBarAlpha) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        setTransparent(activity);        addTranslucentView(activity, statusBarAlpha);    }    /**     * 设置状态栏全透明     */    public static void setTransparent(Activity activity) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        transparentStatusBar(activity);        setRootView(activity);    }    /**     * 使状态栏透明(5.0以上半透明效果,不建议使用)     */    public static void setTranslucentHalf(Activity activity) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            setRootView(activity);        }    }    /**     * 为DrawerLayout 布局设置状态栏变色     */    public static void setColorForDrawerLayout(Activity activity, DrawerLayout drawerLayout, int color) {        setColorForDrawerLayout(activity, drawerLayout, color, DEFAULT_STATUS_BAR_ALPHA);    }    /**     * 为DrawerLayout 布局设置状态栏颜色,纯色     */    public static void setColorNoTranslucentForDrawerLayout(Activity activity, DrawerLayout drawerLayout, int color) {        setColorForDrawerLayout(activity, drawerLayout, color, 0);    }    /**     * 为DrawerLayout 布局设置状态栏变色     */    public static void setColorForDrawerLayout(Activity activity, DrawerLayout drawerLayout, int color, int statusBarAlpha) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {            activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            activity.getWindow().setStatusBarColor(Color.TRANSPARENT);        } else {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);        }        View statusBarView = createStatusBarView(activity, color);        ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0);        contentLayout.addView(statusBarView, 0);        // 内容布局不是 LinearLayout 时,设置padding top        if (!(contentLayout instanceof LinearLayout) && contentLayout.getChildAt(1) != null) {            contentLayout.getChildAt(1).setPadding(0, getStatusBarHeight(activity), 0, 0);        }        // 设置属性        ViewGroup drawer = (ViewGroup) drawerLayout.getChildAt(1);        drawerLayout.setFitsSystemWindows(false);        contentLayout.setFitsSystemWindows(false);        contentLayout.setClipToPadding(true);        drawer.setFitsSystemWindows(false);        addTranslucentView(activity, statusBarAlpha);    }    /**     * 为DrawerLayout 布局设置状态栏变色(5.0以下无半透明效果,不建议使用)     */    public static void setColorForDrawerLayoutHalf(Activity activity, DrawerLayout drawerLayout, int color) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            View statusBarView = createStatusBarView(activity, color);            ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0);            contentLayout.addView(statusBarView, 0);            // 内容布局不是 LinearLayout 时,设置padding top            if (!(contentLayout instanceof LinearLayout) && contentLayout.getChildAt(1) != null) {                contentLayout.getChildAt(1).setPadding(0, getStatusBarHeight(activity), 0, 0);            }            // 设置属性            ViewGroup drawer = (ViewGroup) drawerLayout.getChildAt(1);            drawerLayout.setFitsSystemWindows(false);            contentLayout.setFitsSystemWindows(false);            contentLayout.setClipToPadding(true);            drawer.setFitsSystemWindows(false);        }    }    /**     * 为 DrawerLayout 布局设置状态栏透明     */    public static void setTranslucentForDrawerLayout(Activity activity, DrawerLayout drawerLayout) {        setTranslucentForDrawerLayout(activity, drawerLayout, DEFAULT_STATUS_BAR_ALPHA);    }    /**     * 为 DrawerLayout 布局设置状态栏透明     */    public static void setTranslucentForDrawerLayout(Activity activity, DrawerLayout drawerLayout, int statusBarAlpha) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        setTransparentForDrawerLayout(activity, drawerLayout);        addTranslucentView(activity, statusBarAlpha);    }    /**     * 为 DrawerLayout 布局设置状态栏透明     */    public static void setTransparentForDrawerLayout(Activity activity, DrawerLayout drawerLayout) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {            activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            activity.getWindow().setStatusBarColor(Color.TRANSPARENT);        } else {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);        }        ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0);        // 内容布局不是 LinearLayout 时,设置padding top        if (!(contentLayout instanceof LinearLayout) && contentLayout.getChildAt(1) != null) {            contentLayout.getChildAt(1).setPadding(0, getStatusBarHeight(activity), 0, 0);        }        // 设置属性        ViewGroup drawer = (ViewGroup) drawerLayout.getChildAt(1);        drawerLayout.setFitsSystemWindows(false);        contentLayout.setFitsSystemWindows(false);        contentLayout.setClipToPadding(true);        drawer.setFitsSystemWindows(false);    }    /**     * 为 DrawerLayout 布局设置状态栏透明(5.0以上半透明效果,不建议使用)     */    public static void setTranslucentForDrawerLayoutHalf(Activity activity, DrawerLayout drawerLayout) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0);            contentLayout.setFitsSystemWindows(true);            contentLayout.setClipToPadding(true);            ViewGroup vg = (ViewGroup) drawerLayout.getChildAt(1);            vg.setFitsSystemWindows(false);            drawerLayout.setFitsSystemWindows(false);        }    }    /**     * 添加半透明矩形条     */    private static void addTranslucentView(Activity activity, int statusBarAlpha) {        ViewGroup contentView = (ViewGroup) activity.findViewById(android.R.id.content);        if (contentView.getChildCount() > 1) {            contentView.removeViewAt(1);        }        contentView.addView(createTranslucentStatusBarView(activity, statusBarAlpha));    }    /**     * 生成一个和状态栏大小相同的彩色矩形条     */    private static View createStatusBarView(Activity activity, int color) {        View statusBarView = new View(activity);        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,                getStatusBarHeight(activity));        statusBarView.setLayoutParams(params);        statusBarView.setBackgroundColor(color);        return statusBarView;    }    /**     * 生成一个和状态栏大小相同的半透明矩形条     */    private static View createStatusBarView(Activity activity, int color, int alpha) {        View statusBarView = new View(activity);        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,                getStatusBarHeight(activity));        statusBarView.setLayoutParams(params);        statusBarView.setBackgroundColor(calculateStatusColor(color, alpha));        return statusBarView;    }    /**     * 设置根布局参数     */    private static void setRootView(Activity activity) {        ViewGroup rootView = (ViewGroup) ((ViewGroup) activity.findViewById(android.R.id.content)).getChildAt(0);        rootView.setFitsSystemWindows(true);        rootView.setClipToPadding(true);    }    /**     * 使状态栏透明     */    @TargetApi(Build.VERSION_CODES.KITKAT)    private static void transparentStatusBar(Activity activity) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {            activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);            activity.getWindow().setStatusBarColor(Color.TRANSPARENT);        } else {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);        }    }    /**     * 创建半透明矩形 View     */    private static View createTranslucentStatusBarView(Activity activity, int alpha) {        View statusBarView = new View(activity);        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,                getStatusBarHeight(activity));        statusBarView.setLayoutParams(params);        statusBarView.setBackgroundColor(Color.argb(alpha, 0, 0, 0));        return statusBarView;    }    /**     * 获取状态栏高度     */    private static int getStatusBarHeight(Context context) {        int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");        return context.getResources().getDimensionPixelSize(resourceId);    }    /**     * 计算状态栏颜色     */    private static int calculateStatusColor(int color, int alpha) {        float a = 1 - alpha / 255f;        int red = color >> 16 & 0xff;        int green = color >> 8 & 0xff;        int blue = color & 0xff;        red = (int) (red * a + 0.5);        green = (int) (green * a + 0.5);        blue = (int) (blue * a + 0.5);        return 0xff << 24 | red << 16 | green << 8 | blue;    }}

4，应用

我们在自己的项目中添加支持，setting.gradle和build.gradle。现在就可以使用我们自己的库了。

5，打jar包，打aar包我这里就不讲了，比较简单

5.1 编写Lib的build.gradle

加上如下脚步代码：

task makeJar(type: Copy) {    delete 'build/libs/tintbarutils.jar'    from('build/intermediates/bundles/release/')    into('build/libs/')     include('classes.jar')    rename ('classes.jar', 'tintbarutils.jar')}makeJar.dependsOn(build)//在终端执行生成JAR包// gradlew makeJar

这里xx.jar改为你最近的就好了哦

5.2 在Teminal中输入gradlew makeJar即可导出Jar包，导出路径为. \library\build\libs