Android Studio 指定签名证书文件

1.先参照Android Studio中创建keystore生成指定的证书文件。

2.在app/build.gradle文件中增加signingConfigs字段：如下所示：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.0"
    defaultConfig {
        applicationId "com.test.example"
        minSdkVersion 14
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }
	
    signingConfigs {
        debug {
            File strFile = new File("../../Keystore/Debug/debug.jks")
            storeFile file(strFile)
            storePassword "storeDebug1234567890"
            keyAlias "debugkey"
            keyPassword "aliasDebug1234567890"
            //println strFile.absolutePath;
        }
        release {
            File strFile = new File("../../Keystore/Release/release.jks")
            storeFile file(strFile)
            storePassword "storeRelease1234567890"
            keyPassword "keyRelease1234567890"
            keyAlias "releasekey"
            // println strFile.absolutePath;
        }
    }
    
    buildTypes {
        release {
            signingConfig  signingConfigs.release
            runProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

注意

1.storeFile，storePassword，keyAlias，keyPassword缺一不可，都必须填写，并且填写正确。

如果没有填写keyAlias，则签名时候会报告Android-APK signing error : Failed to read key from keystore

密码不正确的时候，会报告java.security.UnrecoverableKeyException: Cannot recover key
This exception may result from the fact that you had provided a key password that was different from the keystore password

2.对于Release配置，在buildTypes中必须指定

signingConfig signingConfigs.release

否则，会出现

Error: The apk for your currently selected variant(app-release-unsigned.apk) is not signed. please specify a signing configuration for this variant(release)

3.signingConfigs必须在buildTypes前面声明，否则会出现找不到配置选项的错误。