[英]Creating and writing file in to /data folder of android device
嗨,我需要创建文本文件并将其写入/ data目录。
这是我正在使用的代码。
try {
Runtime runtime = Runtime.getRuntime();
Process process = runtime.exec("chmod 777 /data");
process.waitFor();
resultFile = new File(Environment.getDataDirectory()
+ "/resultfile.txt");
Log.i(TAG,"File Object Created....."+resultFile);
} catch (Exception e) {
Log.i(TAG, "Exception in Environment.getDataDirectory()"
+ e.toString());
}
try {
try {
Runtime runtime = Runtime.getRuntime();
Process process = runtime.exec("chmod 777 /data/resultfile.txt");
process.waitFor();
if (!resultFile.exists())
resultFile.createNewFile();
} catch (IOException ioException) {
Log.i(TAG, "Exception in creating file..."
+ ioException.toString());
}
try {
if (fileWriter == null)
fileWriter = new FileWriter(resultFile);
} catch (FileNotFoundException fileNotFoundException) {
Log.i(TAG, "FileNotFoundException....."
+ fileNotFoundException.toString());
}
但我得到以下问题......
Exception in creating file...java.io.IOException: Permission denied
FileNotFoundException.....java.io.FileNotFoundException: /data/resultfile.txt (Permission denied)
Exception in saveResultsToFile.....java.lang.NullPointerException
请帮助我...谢谢。
这不起作用,因为您没有任何权限可以在那里写入。 该目录由root拥有。
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