root - data directory not accessible android -

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i have rooted device , trying write file on /data/data folder, "parent directory of file not writable: /data/data/test.txt" exception occur when control going create file. code:

runtime runtime = runtime.getruntime(); process process = runtime.exec("chmod 777 /data/data"); process.waitfor(); resultfile = new file(environment.getdatadirectory()+ "/data/test.txt"); if (!resultfile.exists()) { resultfile.createnewfile(); }

please me wrong.

change directory /data/data/your_package_name/test.txt


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