Android 建立資料夾、生成檔案並寫入文字檔案內容
阿新 • • 發佈：2019-01-31
一、首先新增許可權
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<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
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二、建立資料夾、生成檔案並寫入文字檔案內容程式碼
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private
void initData() {
String filePath =
"/sdcard/Test/";
String fileName =
"log.txt";
writeTxtToFile("txt content", filePath, fileName);
}
// 將字串寫入到文字檔案中
public
void writeTxtToFile(String strcontent, String filePath, String fileName) {
//生成資料夾之後，再生成檔案，不然會出錯
makeFilePath(filePath, fileName);
String strFilePath = filePath+fileName;// 每次寫入時，都換行寫
String strContent = strcontent +
"\r\n";
try
{
File file =
new File(strFilePath);
if
(!file.exists()) {
Log.d("TestFile",
"Create the file:"
+ strFilePath);
file.getParentFile().mkdirs();
file.createNewFile();
}
RandomAccessFile raf =
new RandomAccessFile(file,
"rwd");
raf.seek(file.length());raf.write(strContent.getBytes());
raf.close();
}
catch (Exception e) {
Log.e("TestFile",
"Error on write File:"
+ e);
}
}
// 生成檔案
public
File makeFilePath(String filePath, String fileName) {
File file =
null;
makeRootDirectory(filePath);
try
{
file =
new File(filePath + fileName);
if
(!file.exists()) {
file.createNewFile();
}
}
catch (Exception e) {
e.printStackTrace();
}
return
file;
}
// 生成資料夾
public
static void makeRootDirectory(String filePath) {
File file =
null;
try
{
file =
new File(filePath);
if
(!file.exists()) {
file.mkdir();
}
}
catch (Exception e) {
Log.i("error:", e+"");
}
}
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