Phonegap插件活动导入布局

时间:2013-11-14 13:25:14

标签: android cordova phonegap-plugins

我正在开发一个包含Activity的Cordova插件,我需要从此活动访问应用程序R.layout,以便我可以调用setContentView

我目前通过制作import com.example.hello.R然后在onCreate method I call setContentView(R.layout.mysurfaceview)上执行此操作`:

问题是我的插件只有在应用程序名称为com.example.hello时才能工作,但我需要在不同的应用程序上安装我的插件而无需手动进行导入。

有没有办法进行通用导入,例如import <appName>.R或其他任何方法?

4 个答案:

答案 0 :(得分:13)

您可以在运行时调用应用程序的资源池,并使用Resources.getIdentifier()函数按名称引用标识符。此函数需要资源名称,类型和包名称。例如:

 String package_name = getApplication().getPackageName();
 Resources resources = getApplication().getResources();
 setContentView(resources.getIdentifier("my_activity_layout", "layout", package_name));

其中“my_activity_layout”是布局xml文件的名称。您也可以以相同的方式引用字符串,drawable和其他资源。在活动中获得该代码后,可以将活动布局文件指定为plugin.xml文件中的源文件,并将其设置为复制到res / layout文件夹中。

<source-file src="path/to/your/layout/file.xml" target-dir="res/layout"/>

如果您对使用源文件名称有任何其他疑问,请查看Phonegap Plugin Specification

答案 1 :(得分:1)

我会在构建时使用cordova CLI hook来修改java import语句,可能是通过解析AndroidManifest或config.xml之外的软件包名称。

我不相信有一种方法可以像你要问的那样进行通配符包导入。

答案 2 :(得分:1)

感谢停泊者的回答, 您可以在插件中创建after_plugin_install挂钩,如下所示

#!/usr/bin/env node
/*
A hook to add R.java to the draw activiy in Android platform.
*/


var fs = require('fs');
var path = require('path');

var rootdir = process.argv[2];

function replace_string_in_file(filename, to_replace, replace_with) {
    var data = fs.readFileSync(filename, 'utf8');
    var result = data.replace(to_replace, replace_with);
    fs.writeFileSync(filename, result, 'utf8');
}

var target = "stage";
if (process.env.TARGET) {
    target = process.env.TARGET;
}

    var ourconfigfile = path.join( "plugins", "android.json");
    var configobj = JSON.parse(fs.readFileSync(ourconfigfile, 'utf8'));
  // Add java files where you want to add R.java imports in the following array

    var filestoreplace = [
        "platforms/android/src/in/co/geekninja/plugin/SketchActivity.java"
    ];
    filestoreplace.forEach(function(val, index, array) {
        if (fs.existsSync(val)) {
          console.log("Android platform available !");
          //Getting the package name from the android.json file,replace with your plugin's id
          var packageName = configobj.installed_plugins["in.co.geekninja.Draw"]["PACKAGE_NAME"];
          console.log("With the package name: "+packageName);
          console.log("Adding import for R.java");
            replace_string_in_file(val,"package in.co.geekninja.plugin;","package in.co.geekninja.plugin;\n\nimport "+packageName+".R;");

        } else {
            console.log("No android platform found! :(");
        }
    });

<platform name="android"> ... </platform>代码

之间添加以下行
<hook type="after_plugin_install" src="hooks/after_plugin_install/hook-add-r-import.js" />

答案 3 :(得分:1)

正如@insomniac所说,钩子可用于替换源文件内容以删除错误的导入和/或添加正确的资源导入。

根据他的回答,我可以创建一个不需要指定文件的脚本。它尝试查找源文件(使用 .java 扩展名),删除其中已有的任何资源导入,然后使用Cordova应用程序包名称导入正确的资源(如果需要)。

这是剧本:

p <- ggplot(data = df, aes(x, y, color = col)) +
  geom_point(size = 15) +
  theme_minimal() +
  theme(legend.background = element_rect(fill = "grey60"),
        legend.text = element_text(size = 18),
        legend.key.size = unit(1.5, "cm"))

p + scale_color_continuous(limits = li, labels = la, breaks = br)

p + scale_color_gradientn(colours = c("black", "white"),
                          limits = li, labels = la, breaks = br)

p + scale_color_gradient(low = "black", high = "white",
                         limits = li, labels = la, breaks = br)

只需在 plugin.xml 中添加 after_plugin_install 挂钩(适用于Android平台):

#!/usr/bin/env node

/*
 * A hook to add resources class (R.java) import to Android classes which uses it.
 */

function getRegexGroupMatches(string, regex, index) {
    index || (index = 1)

    var matches = [];
    var match;
    if (regex.global) {
        while (match = regex.exec(string)) {
            matches.push(match[index]);
            console.log('Match:', match);
        }
    }
    else {
        if (match = regex.exec(string)) {
            matches.push(match[index]);
        }
    }

    return matches;
}

module.exports = function (ctx) {
    // If Android platform is not installed, don't even execute
    if (ctx.opts.cordova.platforms.indexOf('android') < 0)
        return;

    var fs = ctx.requireCordovaModule('fs'),
        path = ctx.requireCordovaModule('path'),
        Q = ctx.requireCordovaModule('q');

    var deferral = Q.defer();

    var platformSourcesRoot = path.join(ctx.opts.projectRoot, 'platforms/android/src');
    var pluginSourcesRoot = path.join(ctx.opts.plugin.dir, 'src/android');

    var androidPluginsData = JSON.parse(fs.readFileSync(path.join(ctx.opts.projectRoot, 'plugins', 'android.json'), 'utf8'));
    var appPackage = androidPluginsData.installed_plugins[ctx.opts.plugin.id]['PACKAGE_NAME'];

    fs.readdir(pluginSourcesRoot, function (err, files) {
        if (err) {
            console.error('Error when reading file:', err)
            deferral.reject();
            return
        }

        var deferrals = [];

        files.filter(function (file) { return path.extname(file) === '.java'; })
            .forEach(function (file) {
                var deferral = Q.defer();

                var filename = path.basename(file);
                var file = path.join(pluginSourcesRoot, filename);
                fs.readFile(file, 'utf-8', function (err, contents) {
                    if (err) {
                        console.error('Error when reading file:', err)
                        deferral.reject();
                        return
                    }

                    if (contents.match(/[^\.\w]R\./)) {
                        console.log('Trying to get packages from file:', filename);
                        var packages = getRegexGroupMatches(contents, /package ([^;]+);/);
                        for (var p = 0; p < packages.length; p++) {
                            try {
                                var package = packages[p];

                                var sourceFile = path.join(platformSourcesRoot, package.replace(/\./g, '/'), filename)
                                if (!fs.existsSync(sourceFile)) 
                                    throw 'Can\'t find file in installed platform directory: "' + sourceFile + '".';

                                var sourceFileContents = fs.readFileSync(sourceFile, 'utf8');
                                if (!sourceFileContents) 
                                    throw 'Can\'t read file contents.';

                                var newContents = sourceFileContents
                                    .replace(/(import ([^;]+).R;)/g, '')
                                    .replace(/(package ([^;]+);)/g, '$1 import ' + appPackage + '.R;');

                                fs.writeFileSync(sourceFile, newContents, 'utf8');
                                break;
                            }
                            catch (ex) {
                                console.log('Could not add import to "' +  filename + '" using package "' + package + '". ' + ex);
                            }
                        }
                    }
                });

                deferrals.push(deferral.promise);
            });

        Q.all(deferrals)
            .then(function() {
                console.log('Done with the hook!');
                deferral.resolve();
            })
    });

    return deferral.promise;
}

希望它有所帮助!