代码之家 › 专栏 › 技术社区 › Nikolay Kulachenko

为Android构建Mailcore2

mailcore2 android-ndk android

Nikolay Kulachenko · 技术社区 · 7 年前

我遵循 official build instractions 重新编译库。就我而言:

> export ANDROID_SDK=$HOME/Library/Android/sdk
> export ANDROID_NDK=$ANDROID_SDK/ndk-bundle
> ./build.sh

在编译过程中会出现一些错误,如:

[arm64-v8a] Compile++      : MailCore <= MCIMAPAsyncSession.cpp
In file included from /Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../include/MailCore/MCObject.h:11:0,
                 from /Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../include/MailCore/MCAutoreleasePool.h:5,
                 from /Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../include/MailCore/MCBaseTypes.h:5,
                 from /Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../../src/async/imap/MCIMAPAsyncSession.h:13,
                 from /Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../../src/async/imap/MCIMAPAsyncSession.cpp:9:
/Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../../src/async/imap/MCIMAPAsyncSession.cpp: In member function 'virtual void mailcore::IMAPAsyncSession::automaticConfigurationDone(mailcore::IMAPSession*)':
/Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../../src/async/imap/MCIMAPAsyncSession.cpp:874:87: warning: 'virtual mailcore::String* mailcore::IMAPSession::gmailUserDisplayName()' is deprecated (declared at /Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../../src/core/imap/MCIMAPSession.h:196) [-Wdeprecated-declarations]
     MC_SAFE_REPLACE_COPY(String, mGmailUserDisplayName, session->gmailUserDisplayName());
                                                                                       ^
/Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../include/MailCore/MCUtils.h:8:27: note: in definition of macro 'MC_SAFE_COPY'
 #define MC_SAFE_COPY(o) ((o) != NULL ? (o)->copy() : NULL)
                           ^
/Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../../src/async/imap/MCIMAPAsyncSession.cpp:874:5: note: in expansion of macro 'MC_SAFE_REPLACE_COPY'
     MC_SAFE_REPLACE_COPY(String, mGmailUserDisplayName, session->gmailUserDisplayName());
     ^
/Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../../src/async/imap/MCIMAPAsyncSession.cpp:874:87: warning: 'virtual mailcore::String* mailcore::IMAPSession::gmailUserDisplayName()' is deprecated (declared at /Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../../src/core/imap/MCIMAPSession.h:196) [-Wdeprecated-declarations]
     MC_SAFE_REPLACE_COPY(String, mGmailUserDisplayName, session->gmailUserDisplayName());
                                                                                       ^
/Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../include/MailCore/MCUtils.h:8:41: note: in definition of macro 'MC_SAFE_COPY'
 #define MC_SAFE_COPY(o) ((o) != NULL ? (o)->copy() : NULL)
                                         ^
/Users/nikolay/Documents/Mailcore/mailcore2/build-android/jni/../../src/async/imap/MCIMAPAsyncSession.cpp:874:5: note: in expansion of macro 'MC_SAFE_REPLACE_COPY'
     MC_SAFE_REPLACE_COPY(String, mGmailUserDisplayName, session->gmailUserDisplayName());
     ^

... compiling goes ok...
... and again some errors...

等等最后我得到:

[arm64-v8a] StaticLibrary  : libstdc++.a
[arm64-v8a] SharedLibrary  : libMailCore.so
[arm64-v8a] Install        : libMailCore.so => libs/arm64-v8a/libMailCore.so
warning: [options] bootstrap class path not set in conjunction with -source 1.6
com/libmailcore/MainThreadUtils.java:3: error: package android.os does not exist
import android.os.Handler;
                 ^
com/libmailcore/MainThreadUtils.java:4: error: package android.os does not exist
import android.os.Looper;
                 ^
com/libmailcore/MainThreadUtils.java:5: error: package android.util does not exist
import android.util.Log;
                   ^
com/libmailcore/MainThreadUtils.java:10: error: cannot find symbol
    private Handler handler;
            ^
  symbol:   class Handler
  location: class MainThreadUtils
com/libmailcore/MainThreadUtils.java:21: error: cannot find symbol
        handler = new Handler(Looper.getMainLooper());
                      ^
  symbol:   class Handler
  location: class MainThreadUtils
com/libmailcore/MainThreadUtils.java:21: error: cannot find symbol
        handler = new Handler(Looper.getMainLooper());
                              ^
  symbol:   variable Looper
  location: class MainThreadUtils
6 errors
1 warning

如何重新编译库?最后我想修复一个 text relocations error 但它连一个干净的建筑都没有

1 回复 | 直到 7 年前

gregn3 5 年前

它正在寻找Android平台16和21,但找不到它们,因此它会显示错误消息:

error: package android.os does not exist

这些通常安装在文件夹中 $ANDROID_SDK/platforms

(将此添加到 build-android/build.sh ,查看它在做什么:

set -v
set -x

这将显示它正在运行的命令以及shell变量的内容。)

如果打开文件 构建android/构建。上海 ,在Mailcore2中,您将看到如下行:

# Start building.
ANDROID_PLATFORM=android-16
archs="armeabi armeabi-v7a x86"

代替 android-16 使用您安装的任何版本,甚至更好的版本,安装 android-16 因为它期待着。还有 armeabi 最新的Android NDK中已经删除了对平台的支持,这给了我一些错误。所以删除 armeabi公司 只留下 armeabi-v7a 和 x86 。

下面还有:

ANDROID_PLATFORM=android-21
archs="arm64-v8a"

以及:

ANDROID_PLATFORM=android-16
cd "$current_dir/../src/java"
...

所以安装起来很简单 android-16 和 android-21 修复此问题。

我也遇到了错误:

Android NDK: APP_PLATFORM not set. Defaulting to minimum supported version android-16.

查找此行:

$ANDROID_NDK/ndk-build TARGET_PLATFORM=$ANDROID_PLATFORM TARGET_ARCH_ABI=$TARGET_ARCH_ABI \

和添加 APP_PLATFORM 这样,修复了该错误:

$ANDROID_NDK/ndk-build TARGET_PLATFORM=$ANDROID_PLATFORM APP_PLATFORM=$ANDROID_PLATFORM TARGET_ARCH_ABI=$TARGET_ARCH_ABI \

我也遇到了错误:

*** Android NDK: Invalid NDK_TOOLCHAIN_VERSION value: 4.9. GCC is no longer supported. See https://android.googlesource.com/platform/ndk/+/master/docs/ClangMigration.md.    .  Stop.

显然,GCC不再受支持。我已安装 叮当声 ,然后它继续编译项目,但由于另一个错误而停止。

此外,我必须删除包含以下内容的行:

NDK_TOOLCHAIN_VERSION=4.9 \

如上所述 here 。

我收到错误:

MailCore2/build-android/jni/../../src/java/TypesUtils.cpp:84:32: error: member access into incomplete type 'const std::type_info'
MCLog("info name: %s", info->name());
                           ^

这显然与 this issue :

GCC似乎只是隐式声明 std::type_info 。在使用Clang和libstdc++进行典型的Hello World时,通常第一次遇到此问题。Xeo 2013年2月26日20:42

我还不能解决这个问题,但我会在有机会的时候更新这篇文章。