Android：使用Gradle构建.apk，并在应用程序的大约页面中使用时间戳

我想使用Gradle创建文件名中带有时间戳的apk，并在关于页面上使用此信息

格拉德尔： （如下）在创建输出文件为DSapp-1.2.0-debug\u date\u time.apk时运行良好

applicationVariants.all { variant ->
    variant.outputs.each { output ->
        def project = "DSapp"
        def sep = "_"
        def version = variant.versionName
        def newApkName = project + sep + version + sep + formattedDateD + "_" + formattedDateT + ".apk"

        output.outputFile = new File(output.outputFile.parent, newApkName)
    }
}

当我尝试使用

buildConfigField

时

android {
compileSdkVersion 21
buildToolsVersion "22.0.1"

def date = new Date();
def formattedDateD = date.format('ddMMyy');
def formattedDateT = date.format('HHmm');

defaultConfig {
    applicationId "com.app_name"
    minSdkVersion 18
    targetSdkVersion 20
    versionCode 1
    versionName "1.2.0"



    buildConfigField "String", "STRING2", formattedDateD
    buildConfigField "String", "STRING3", formattedDateT

}

关于.java：

    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_about);

    version_number = (TextView)findViewById(R.id.version_number);
    version_number.setText(mVersionName);

    mVersionBuild= "( " + BuildConfig.STRING2 +"_"+BuildConfig.STRING3+ " )";
    version_build = (TextView)findViewById(R.id.version_build);
    version_build.setText(mVersionBuild);

我在

BuildConfig.java

  // Fields from default config.
  public static final String STRING2 = 281116;
  public static final String STRING3 = 0947;

---

错误：（15，40）错误：整数太大：0947

因此，要实现使用Gradle创建文件名中带有时间戳的apk，还可以在“关于”页面上使用此信息。 我不得不改变我的方法，放弃使用

buildConfigField

的想法，因为这不是实现上述目标所必需的

渐变文件：

向每个

versionNameSuffix

添加

'+getDateTime（）

及

因此，

buildType

的每个部分都将如下所示（调试示例）：

在android{}之外添加：

//to handle build process with output as: App_Name_versionName-buildType_date_time.apk
def customAPKname(variant, defaultConfig, buildType) {
    variant.outputs.each { output ->    
        def file = output.packageApplication.outputFile
        def fileName = "App_Name" + defaultConfig.versionName + buildType + ".apk"
            output.packageApplication.outputFile = new File(file.parent, fileName)
        }
}

def getDateTime(){
    def date = new Date()
    def formattedDate = date.format('yyMMdd_HHmm')
    return formattedDate
}

现在在About.java文件中：

private TextView version_number, version_build;
private String mVersionName, mVersionBuild;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_about);

    if (BuildConfig.VERSION_NAME.contains("debug")){
        mVersionName = "App_Name Software version: " + BuildConfig.VERSION_NAME.substring(0,11);
        mVersionBuild = "Build version: " + BuildConfig.VERSION_NAME.substring(12);
    }else {
        mVersionName = "App_Name Software version: " + BuildConfig.VERSION_NAME.substring(0, 13);
        mVersionBuild = "Build version: " + BuildConfig.VERSION_NAME.substring(14);
    }

    version_number = (TextView)findViewById(R.id.version_number);
    version_number.setText(mVersionName);

    version_build = (TextView)findViewById(R.id.version_build);
    version_build.setText(mVersionBuild);

}

---

输出（用于调试）：

App_Name_1.2.0-debug_yymdd_HHMM.apk

Java基本字符串变量应该有撇号=>检查文档如何使用

buildConfigField

字符串

//to handle build process with output as: App_Name_versionName-buildType_date_time.apk
def customAPKname(variant, defaultConfig, buildType) {
    variant.outputs.each { output ->    
        def file = output.packageApplication.outputFile
        def fileName = "App_Name" + defaultConfig.versionName + buildType + ".apk"
            output.packageApplication.outputFile = new File(file.parent, fileName)
        }
}

def getDateTime(){
    def date = new Date()
    def formattedDate = date.format('yyMMdd_HHmm')
    return formattedDate
}

private TextView version_number, version_build;
private String mVersionName, mVersionBuild;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_about);

    if (BuildConfig.VERSION_NAME.contains("debug")){
        mVersionName = "App_Name Software version: " + BuildConfig.VERSION_NAME.substring(0,11);
        mVersionBuild = "Build version: " + BuildConfig.VERSION_NAME.substring(12);
    }else {
        mVersionName = "App_Name Software version: " + BuildConfig.VERSION_NAME.substring(0, 13);
        mVersionBuild = "Build version: " + BuildConfig.VERSION_NAME.substring(14);
    }

    version_number = (TextView)findViewById(R.id.version_number);
    version_number.setText(mVersionName);

    version_build = (TextView)findViewById(R.id.version_build);
    version_build.setText(mVersionBuild);

}