我正在尝试获取/proc/self/exe的规范路径。当我在主线程上执行此操作时,它可以正常工作,但当我在另一个线程上执行时,它会因IOException:"Permission denied"而崩溃。
DBG E Thread: main
E Path: /system/bin/app_process32
E Thread: Thread-21656
System.err W java.io.IOException: Permission denied
W at java.io.File.canonicalizePath(Native Method)
W at java.io.File.getCanonicalPath(File.java:414)
W at java.io.File.getCanonicalFile(File.java:428)
W at com.quanturium.testbugprocselfexe.MyActivity.getPathOfExecutable(MyActivity.java:36)
W at com.quanturium.testbugprocselfexe.MyActivity.access$000(MyActivity.java:12)
W at com.quanturium.testbugprocselfexe.MyActivity$1.run(MyActivity.java:26)
W at java.lang.Thread.run(Thread.java:818)
代码:
@Override
protected void onCreate (Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getPathOfExecutable(); // Works as expected
new Thread(new Runnable() {
@Override
public void run ()
{
getPathOfExecutable(); // Trigger the IOException: Permission denied
}
}).start();
}
private void getPathOfExecutable()
{
try
{
Log.e("DBG", "Thread: " + Thread.currentThread().getName());
Log.e("DBG", "Path: " + new File("/proc/self/exe").getCanonicalFile().getPath());
}
catch (IOException e)
{
e.printStackTrace();
}
}
当build.gradle文件中的debuggable被配置为false时,才会发生此错误。
试用代码:https://github.com/quanturium/TestBugProcSelfExe
这是一个bug还是预期行为?如何解决获取当前可执行文件路径的问题?
READ_EXTERNAL_STORAGE
权限。 - Corey Ogburn