OpenJDK7编译Android4.4小记
July 10, 2014•245 words
自从上次Oracle状告Google以后，Android官网上推荐的JDK就改成OpenJDK7了，但目前只有AOSP的master分支和l-preview分支及以后的版本才支持用OpenJDK7编译。本着“为未来做准备”的态度，我尝试用OpenJDK7编译了一次Android 4.4(KitKat)，当然遇到了很多问题。
libcore/libdvm & libcore/libart
报错位置: 对应目录下的 src/main/java/java/lang/Enum.java
解决方法: 感谢 秋叶随风
public final int compareTo(E o) {
- return ordinal - o.ordinal;
+ return ordinal - o.ordinal ();
}
frameworks/opt/telephony
报错位置: src/java/com/android/internal/telephony/gsm/GSMPhone.java
解决方法: 感谢 秋叶随风
删除 public GSMPhone (Context context, CommandsInterface ci, PhoneNotifier notifier, boolean unitTestMode) 构造器中的 if (DBG_PORT) {}语句块即可
packages/apps/Gallery2
报错位置: src/com/android/gallery3d/util/LinkedNode.java
解决方法: 感谢 秋叶随风
public class LinkedNode {
- private LinkedNode mPrev;
- private LinkedNode mNext;
+ protected LinkedNode mPrev;
+ protected LinkedNode mNext;
public LinkedNode() {
mPrev = mNext = this;
build
报错位置: 各种makefile
解决方法: 修改太多，请见 https://github.com/LOSP/android_build/commits/kk 大体就是修改需求的java版本号来解决问题
external/chromium_org
报错位置: (这个可能并不是所有人都会遇到)base/android/jnigenerator/jnigenerator.py
解决方法:
@staticmethod
def CreateFromClass(class_file, options):
class_name = os.path.splitext(os.path.basename(class_file))[0]
- p = subprocess.Popen(args=['javap', '-s', class_name],
+ p = subprocess.Popen(args=['javap', '-s', class_file],
cwd=os.path.dirname(class_file),
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
frameworks/base
报错位置1: out/target/common/obj/JAVALIBRARIES/androidstubscurrentintermediates/src/android/telephony/gsm/SmsManager.java
(或) out/target/common/obj/JAVALIBRARIES/androidstubscurrentintermediates/src/android/telephony/gsm/SmsMessage.java
解决方法1: frameworks/base/Android.mk
../../external/apache-http/src/org/apache/http \
../opt/telephony/src/java/android/provider \
../opt/telephony/src/java/android/telephony \
- ../opt/telephony/src/java/android/telephony/gsm \
../opt/net/voip/src/java/android/net/rtp \
../opt/net/voip/src/java/android/net/sip
报错位置2: packages/SystemUI/src/com/android/systemui/statusbar/SystemBars.java (无参构造器缺失)
解决方法2: (这个解决方法不完美，是个dirty fix)
import com.android.systemui.R;
import com.android.systemui.SystemUI;
+import com.android.systemui.statusbar.phone.PhoneStatusBar;
import java.io.FileDescriptor;
import java.io.PrintWriter;
@@ -97,7 +98,12 @@ private void createStatusBarFromConfig() {
throw andLog("Error loading status bar component: " + clsName, t);
}
try {
- mStatusBar = (BaseStatusBar) cls.newInstance();
+ if (clsName.contains("PhoneStatusBar")) {
+ // Dirty fix "no zero argument constructor" error
+ mStatusBar = new PhoneStatusBar();
+ } else {
+ mStatusBar = (BaseStatusBar) cls.newInstance();
+ }
} catch (Throwable t) {
throw andLog("Error creating status bar component: " + clsName, t);
}
external/proguard
报错原因: 默认的proguard是4.4版本，不支持Java7
解决方法: revert commit 9f606f95f03a75961498803e24bee6799a7c0885 (此操作将升级proguard到4.7) (当然，会遇到冲突，你只要保留"====="后面的内容就可以了)
以上就是我编译的时候遇到的所有错误，大家可以参考。当然，有些错误很奇葩，比如SystemBar那个错误，根本就不该发生。不管他了，反正我解决了。