在 Android 开发中，有时会遇到 ANR，一旦出现 ANR 我们就需要拿到对应的trace 文件来分析并解决。本文将介绍两种获取 ANR 的方法。
第一种
直接查看/data/anr/traces.txt的内容,如下
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| adb shell cat /data/anr/traces.txt
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或者类似使用拷贝到电脑上查看，比如
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| adb shell cp /data/anr/traces.txt /sdcard
adb pull /sdcard/traces.txt ./
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但是这种方法在某些手机上由于权限原因，无法进行，就需要了使用下面的方法了。
第二种
这种方法就是进行adb bugreport，没有权限限制问题。具体步骤是
生成 bugreport 文件
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| adb bugreport
/data/user_de/0/com.android.shell/files/bugreports/bugreport-sailfish-QP1A.191005.007.A3-2021-01-12-15-30-21.zip: 1 file pulled, 0 skipped. 30.6 MB/s (3897489 bytes in 0.121s)
Bug report copied to /private/tmp/bugreport-sailfish-QP1A.191005.007.A3-2021-01-12-15-30-21.zip
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进行解压文件
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| unzip bugreport-sailfish-QP1A.191005.007.A3-2021-01-12-15-32-54.zip
Archive: bugreport-sailfish-QP1A.191005.007.A3-2021-01-12-15-32-54.zip
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查看 ANR stacktrace 文件
文件路径通常为FS/data/anr，具体可以根据日期来确定哪一个文件。
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| cat FS/data/anr/anr_2021-01-12-14-59-10-559
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