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〖Android〗Nexus 7 flo (razor) 刷入Recovery/CM-11.0后卡在开机动画的解决方法
操作日志：
起因：Nexus 7 flo 华硕平板，刷了一个CWM Recovery之后变成了砖机；
尝试1：使用CWM Recovery清除数据，开机失败
尝试2：刷入CM 11 Snapshot的zip卡刷包，并使用Recovery清除数据，开机失败
尝试3：刷入CM 11 eng自己编译的版本，并使用Recovery清除数据，开机失败
尝试4：fastboot flash boot /path/to/boot.img，并刷入 CM 11 eng自己编译的版本，并Recovery清除数据，开机失败
尝试5：使用Logcat抓日志，输出如下
1 D/AndroidRuntime( 532): >>>>>> AndroidRuntime START com.android.internal.os.ZygoteInit <<<<<< 2 D/AndroidRuntime( 532): CheckJNI is ON 3 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory 4 I/dalvikvm( 532): Unable to open or create cache for /system/framework/core.jar (/data/dalvik-cache/system@framework@core.jar@classes.dex) 5 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/core.jar‘ 6 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory 7 I/dalvikvm( 532): Unable to open or create cache for /system/framework/conscrypt.jar (/data/dalvik-cache/system@framework@conscrypt.jar@classes.dex) 8 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/conscrypt.jar‘ 9 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory10 I/dalvikvm( 532): Unable to open or create cache for /system/framework/okhttp.jar (/data/dalvik-cache/system@framework@okhttp.jar@classes.dex)11 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/okhttp.jar‘12 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory13 I/dalvikvm( 532): Unable to open or create cache for /system/framework/core-junit.jar (/data/dalvik-cache/system@framework@core-junit.jar@classes.dex)14 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/core-junit.jar‘15 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory16 I/dalvikvm( 532): Unable to open or create cache for /system/framework/bouncycastle.jar (/data/dalvik-cache/system@framework@bouncycastle.jar@classes.dex)17 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/bouncycastle.jar‘18 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory19 I/dalvikvm( 532): Unable to open or create cache for /system/framework/ext.jar (/data/dalvik-cache/system@framework@ext.jar@classes.dex)20 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/ext.jar‘21 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory22 I/dalvikvm( 532): Unable to open or create cache for /system/framework/framework.jar (/data/dalvik-cache/system@framework@framework.jar@classes.dex)23 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/framework.jar‘24 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory25 I/dalvikvm( 532): Unable to open or create cache for /system/framework/framework2.jar (/data/dalvik-cache/system@framework@framework2.jar@classes.dex)26 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/framework2.jar‘27 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory28 I/dalvikvm( 532): Unable to open or create cache for /system/framework/telephony-common.jar (/data/dalvik-cache/system@framework@telephony-common.jar@classes.dex)29 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/telephony-common.jar‘30 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory31 I/dalvikvm( 532): Unable to open or create cache for /system/framework/voip-common.jar (/data/dalvik-cache/system@framework@voip-common.jar@classes.dex)32 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/voip-common.jar‘33 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory34 I/dalvikvm( 532): Unable to open or create cache for /system/framework/mms-common.jar (/data/dalvik-cache/system@framework@mms-common.jar@classes.dex)35 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/mms-common.jar‘36 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory37 I/dalvikvm( 532): Unable to open or create cache for /system/framework/android.policy.jar (/data/dalvik-cache/system@framework@android.policy.jar@classes.dex)38 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/android.policy.jar‘39 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory40 I/dalvikvm( 532): Unable to open or create cache for /system/framework/services.jar (/data/dalvik-cache/system@framework@services.jar@classes.dex)41 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/services.jar‘42 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory43 I/dalvikvm( 532): Unable to open or create cache for /system/framework/apache-xml.jar (/data/dalvik-cache/system@framework@apache-xml.jar@classes.dex)44 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/apache-xml.jar‘45 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory46 I/dalvikvm( 532): Unable to open or create cache for /system/framework/webviewchromium.jar (/data/dalvik-cache/system@framework@webviewchromium.jar@classes.dex)47 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/webviewchromium.jar‘48 E/dalvikvm( 532): Could not stat dex cache directory ‘/data/dalvik-cache‘: No such file or directory49 I/dalvikvm( 532): Unable to open or create cache for /system/framework/telephony-msim.jar (/data/dalvik-cache/system@framework@telephony-msim.jar@classes.dex)50 D/dalvikvm( 532): Unable to process classpath element ‘/system/framework/telephony-msim.jar‘51 E/dalvikvm( 532): No valid entries found in bootclasspath52 ‘/system/framework/core.jar:/system/framework/conscrypt.jar:/system/framework/okhttp.jar:/system/framework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/framework2.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/mms-common.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/apache-xml.jar:/system/framework/webviewchromium.jar:/system/framework/telephony-msim.jar‘53 E/dalvikvm( 532): VM aborting54 F/libc ( 532): Fatal signal 6 (SIGABRT) at 0x00000214 (code=-6), thread 532 (zygote)55 I/ServiceManager( 180): service ‘media.audio_flinger‘ died56 I/ServiceManager( 180): service ‘media.player‘ died57 I/ServiceManager( 180): service ‘media.camera‘ died
这理应是数据没有清除完成导致的，于是 Google下，尝试使用 fastboot -w 来清除数据，最后成功开机！
小结，Nexus 7 此类问题解决方法(黄背景的是重点，前两步可选)：
adb sideload /media/Source/CyanogenMod/out/cm-11.0/target/product/flo/cm-11-20141224-UNOFFICIAL-flo.zip
fastboot flash boot /media/Source/CyanogenMod/out/cm-11.0/target/product/flo/boot.img
fastboot -w
〖Android〗Nexus 7 flo (razor) 刷入Recovery/CM-11.0后卡在开机动画的解决方法
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