为 Android 构建 Mailcore2
Build Mailcore2 for Android
我按照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
并在编译过程中出现一些错误，例如：
[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 但它甚至没有建立一个干净的构建
它正在寻找 Android 平台 16 和 21，但找不到它们，这就是它显示错误消息的原因：
error: package android.os does not exist
这些通常安装在文件夹中 $ANDROID_SDK/platforms
（将其添加到 build-android/build.sh 的顶部附近，以查看它在做什么：
set -v
set -x
这将显示它的命令 运行，以及 shell 变量的内容。）
如果您在 Mailcore2 中打开文件 build-android/build.sh，您将看到如下行：
# Start building.
ANDROID_PLATFORM=android-16
archs="armeabi armeabi-v7a x86"
将 android-16 替换为您安装的任何版本，或者更好的是，安装 android-16 因为它期望如此。
此外，armeabi 平台支持已从最新的 Android NDK 中删除，这给我带来了错误。所以删除 armeabi 只留下 armeabi-v7a 和 x86.
再往下还有：
ANDROID_PLATFORM=android-21
archs="arm64-v8a"
和：
ANDROID_PLATFORM=android-16
cd "$current_dir/../src/java"
...
所以安装android-16和android-21最容易解决这个问题。
我也遇到了错误：
Android NDK: APP_PLATFORM not set. Defaulting to minimum supported version android-16.
找到这一行：
$ANDROID_NDK/ndk-build TARGET_PLATFORM=$ANDROID_PLATFORM TARGET_ARCH_ABI=$TARGET_ARCH_ABI \
并向其中添加 APP_PLATFORM，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.
显然不再支持 GCC。我安装了 clang，然后它继续编译项目，但因另一个错误而停止。
此外，我不得不删除包含以下内容的行：
NDK_TOOLCHAIN_VERSION=4.9 \
如所述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 有关：
GCC 似乎隐式声明了 std::type_info。在使用 Clang 和 libstdc++ 执行典型的 Hello World 时，您通常会在第一次遇到这个问题。 – 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个post。
我按照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
并在编译过程中出现一些错误，例如：
[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 但它甚至没有建立一个干净的构建
它正在寻找 Android 平台 16 和 21，但找不到它们，这就是它显示错误消息的原因：
error: package android.os does not exist
这些通常安装在文件夹中 $ANDROID_SDK/platforms
（将其添加到 build-android/build.sh 的顶部附近，以查看它在做什么：
set -v
set -x
这将显示它的命令 运行，以及 shell 变量的内容。）
如果您在 Mailcore2 中打开文件 build-android/build.sh，您将看到如下行：
# Start building.
ANDROID_PLATFORM=android-16
archs="armeabi armeabi-v7a x86"
将 android-16 替换为您安装的任何版本，或者更好的是，安装 android-16 因为它期望如此。
此外，armeabi 平台支持已从最新的 Android NDK 中删除，这给我带来了错误。所以删除 armeabi 只留下 armeabi-v7a 和 x86.
再往下还有：
ANDROID_PLATFORM=android-21
archs="arm64-v8a"
和：
ANDROID_PLATFORM=android-16
cd "$current_dir/../src/java"
...
所以安装android-16和android-21最容易解决这个问题。
我也遇到了错误：
Android NDK: APP_PLATFORM not set. Defaulting to minimum supported version android-16.
找到这一行：
$ANDROID_NDK/ndk-build TARGET_PLATFORM=$ANDROID_PLATFORM TARGET_ARCH_ABI=$TARGET_ARCH_ABI \
并向其中添加 APP_PLATFORM，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.
显然不再支持 GCC。我安装了 clang，然后它继续编译项目，但因另一个错误而停止。
此外，我不得不删除包含以下内容的行：
NDK_TOOLCHAIN_VERSION=4.9 \
如所述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 有关：
GCC 似乎隐式声明了 std::type_info。在使用 Clang 和 libstdc++ 执行典型的 Hello World 时，您通常会在第一次遇到这个问题。 – 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个post。