[英]Error in creating json file locally in internal storage
I want to store json file internally from server. 我想从服务器内部存储json文件。 For that I am using below method.
为此,我正在使用以下方法。 but I got error.
但我有错误。 Please help on it.
请帮忙。
try {
final String TESTSTRING =jsonBranchArray.toString();
FileOutputStream fOut = openFileOutput("samplefile.json",
MODE_WORLD_READABLE);
OutputStreamWriter osw = new OutputStreamWriter(fOut);
osw.write(TESTSTRING);
osw.flush();
osw.close();
FileInputStream fIn = openFileInput("samplefile.json");
InputStreamReader isr = new InputStreamReader(fIn);
char[] inputBuffer = new char[TESTSTRING.length()];
isr.read(inputBuffer);
String readString = new String(inputBuffer);
boolean isTheSame = TESTSTRING.equals(readString);
Log.i("File Reading stuff", "success = " + isTheSame);
} catch (IOException ioe) {
ioe.printStackTrace();
}
And error is.. 08-02 12:26:13.449: W/dalvikvm(23547): threadid=1: thread exiting with uncaught exception (group=0x40015560) 08-02 12:26:13.459: E/AndroidRuntime(23547): FATAL EXCEPTION: main 08-02 12:26:13.459: E/AndroidRuntime(23547): java.lang.NullPointerException 08-02 12:26:13.459: E/AndroidRuntime(23547): at com.example.MainActivity.WriteToFile(MainActivity.java:224) 08-02 12:26:13.459: E/AndroidRuntime(23547): at com.example.MainActivity.onClick(MainActivity.java:90) 08-02 12:26:13.459: E/AndroidRuntime(23547): at android.view.View.performClick(View.java:2485) 08-02 12:26:13.459: E/AndroidRuntime(23547): at android.view.View$PerformClick.run(View.java:9080) 08-02 12:26:13.459: E/AndroidRuntime(23547): at android.os.Handler.handleCallback(Handler.java:587) 08-02 12:26:13.459: E/AndroidRuntime(23547): at android.os.Handler.dispatchMessage(Handler.java:92) 08-02 12:26:13.459: E/AndroidRuntime(23547): at android.os.Looper.loop(Looper.java:123) 08-02 12:26:13.459: E/AndroidRuntime(235 错误是.. 08-02 12:26:13.449:W / dalvikvm(23547):threadid = 1:线程退出时未捕获到异常(group = 0x40015560)08-02 12:26:13.459:E / AndroidRuntime(23547) :致命异常:主08-02 12:26:13.459:E / AndroidRuntime(23547):java.lang.NullPointerException 08-02 12:26:13.459:E / AndroidRuntime(23547):在com.example.MainActivity.WriteToFile (MainActivity.java:224)08-02 12:26:13.459:E / AndroidRuntime(23547):at com.example.MainActivity.onClick(MainActivity.java:90)08-02 12:26:13.459:E / AndroidRuntime (23547):位于android.view.View.performClick(View.java:2485)08-02 12:26:13.459:E / AndroidRuntime(23547):位于android.view.View $ PerformClick.run(View.java: 9080)08-02 12:26:13.459:E / AndroidRuntime(23547):at android.os.Handler.handleCallback(Handler.java:587)08-02 12:26:13.459:E / AndroidRuntime(23547):at android.os.Handler.dispatchMessage(Handler.java:92)08-02 12:26:13.459:E / AndroidRuntime(23547):at android.os.Looper.loop(Looper.java:123)08-02 12: 26:13.459:E / AndroidRuntime(235 47): at android.app.ActivityThread.main(ActivityThread.java:3683) 08-02 12:26:13.459: E/AndroidRuntime(23547): at java.lang.reflect.Method.invokeNative(Native Method) 08-02 12:26:13.459: E/AndroidRuntime(23547): at java.lang.reflect.Method.invoke(Method.java:507) 08-02 12:26:13.459: E/AndroidRuntime(23547): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 08-02 12:26:13.459: E/AndroidRuntime(23547): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 08-02 12:26:13.459: E/AndroidRuntime(23547): at dalvik.system.NativeStart.main(Native Method)
47):位于android.app.ActivityThread.main(ActivityThread.java:3683)08-02 12:26:13.459:E / AndroidRuntime(23547):位于java.lang.reflect.Method.invokeNative(本机方法)08- 02 12:26:13.459:E / AndroidRuntime(23547):at java.lang.reflect.Method.invoke(Method.java:507)08-02 12:26:13.459:E / AndroidRuntime(23547):at com。 android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:839)08-02 12:26:13.459:E / AndroidRuntime(23547):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java :597)08-02 12:26:13.459:E / AndroidRuntime(23547):位于dalvik.system.NativeStart.main(本机方法)
and sample json is.. 和示例json是..
{
"Title" : "........Name....",
"Logo" : "http://test/1.jpg",
"ID" : "1015",
"Contact":{
"Title" : " something ",
"Image" : "http://test/1.jpg",
"ID" : "1016",
"Full Address" : " something something something something something ",
"Contact No" : ".....Post Date with Time....",
"Mail ID" : ".....Start Date with Time....",
"SiteLink" : "...wwww.abc.com......",
"LandLine No" : ".....End Date with Time...."
},
"Activities" : {"News":[
{
"Image" : "http://test/1.jpg",
"ID" : "1017",
"Title" : " something ",
"Description" : " something something something something something ",
"Date" : ".....Post Date...."
},{
"Image" : "http://test/2.jpg",
"ID" : "1018",
"Title" : " something ",
"Description" : " something something something something something ",
"Date" : ".....Post Date...."
},{
"Image" : "http://test/3.jpg",
"ID" : "1019",
"Title" : " something ",
"Description" : " something something something something something ",
"Date" : ".....Post Date...."
},{
"Image" : "http://test/4.jpg",
"ID" : "1020",
"Title" : " something ",
"Description" : " something something something something something ",
"Date" : ".....Post Date...."
},{
"Image" : "http://test/5.jpg",
"ID" : "1021",
"Title" : " something ",
"Description" : " something something something something something ",
"Date" : ".....Post Date...."
},{
"Image" : "http://test/6.jpg",
"ID" : "1022",
"Title" : " something ",
"Description" : " something something something something something ",
"Date" : ".....Post Date...."
},{
"Image" : "http://test/7.jpg",
"ID" : "1023",
"Title" : " something ",
"Description" : " something something something something something ",
"Date" : ".....Post Date...."
}
],
"Events":[
{
"Image" : "http://test/7.jpg",
"ID" : "1024",
"Title" : " something ",
"Description" : " something something something something something ",
"Location" : "......Event Loc......",
"Start Date" : ".....Start Date with Time....",
"End Date" : ".....End Date with Time...."
},{
"Image" : "http://test/3.jpg",
"ID" : "1025",
"Title" : " something ",
"Description" : " something something something something something ",
"Location" : "......Event Loc......",
"Start Date" : ".....Start Date with Time....",
"End Date" : ".....End Date with Time...."
},{
"Image" : "http://test/4.jpg",
"ID" : "1026",
"Title" : " something ",
"Description" : " something something something something something ",
"Location" : "......Event Loc......",
"Start Date" : ".....Start Date with Time....",
"End Date" : ".....End Date with Time...."
},{
"Image" : "http://test/1.jpg",
"ID" : "1027",
"Title" : " something ",
"Description" : " something something something something something ",
"Location" : "......Event Loc......",
"Start Date" : ".....Start Date with Time....",
"End Date" : ".....End Date with Time...."
}
]...as so on
class GetContacts extends AsyncTask<Void, String, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected Void doInBackground(Void... params) {
DefaultHttpClient httpclient = new DefaultHttpClient();
try {
HttpGet httpget = new HttpGet(
"url");
HttpResponse response = httpclient.execute(httpget);
String jsonResp = EntityUtils.toString(response.getEntity());
Log.d("HTTP","Rsponse : "+ jsonResp);
JSONObject jsonObject = new JSONObject(jsonResp);
/// ADD YOUR CODE HERE------------------------------------------------------------->
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
}
}
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