App crashing when attempting to Write to .json

Question

EDITED

So I am trying to write a code that writes to a .Json but my app keeps crashing on me.

I follow serval tutorials on what to do but non of them help.

My code is as Follows:

AndroidManifest:

<uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name = "android.permission.WRITE_INTERNAL_STORAGE"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity"
            android:screenOrientation="portrait" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>

MainActivity:

private static final String FILE_NAME = "MyDataSheet.json";

...

public String chkFile(Context context) { String json = null;

try {
    InputStream is = context.getAssets().open(FILE_NAME);
    int size = is.available();
    byte[] buffer = new byte[size];
    is.read(buffer);
    is.close();
    json = new String(buffer, "UTF-8");
} catch (IOException ex) {
    ex.printStackTrace();
    return null;
}
return json;
}

...

protected  void sdBTN(View v, Context context)
{
    String txt1 = input1.getText().toString();
    String txt2 = input2.toString();
    String txt3 = unput3.toString();

JSONObject object = null;
try {
    object = new JSONObject(chkFile(this));
} catch (JSONException e) {
    e.printStackTrace();
}


try {
    object.put("name", text1);
    object.put("googleSheet", myGoogleSheet);
    object.put("googleScript", myGoogleScript);

} catch (JSONException e) {
    e.printStackTrace();
}
System.out.println(object);

}

I created the file in a assets folder but the app is Still exhibiting the same result of closing on me, as with my previous .txt attempt.

I follow tutorials, but non help.

What you see is what there is, that is what according to the tutorials needs to create the .txt — Heinrich Espach, Jul 27 '20 at 19:13

DuncG · Answer 1 · 2020-07-27T08:53:49.840

You should check the console log output to see the actual error message to include in your question. Make use of Android Logging classes. Add logging like in this format:

import android.util.Log;
...
private static final String TAG = "MyAppName";
Log.i(TAG, "Some info message such as mkdir: "+file);

if (BuildConfig.DEBUG) {
   Log.d(TAG, "Some debug message here");
}

Get rid of e.printStackTrace() and use:

Log.e(TAG, "Failed to save:"+file, e);

While your application is running after launch from Android Studio and when connected to a device on USB, go to the Logcat tab of Android Studio. The Logcat tab allows filter on name - just type in "MyAppName" then run your test again.

You have 'file.mkdir();' in chkFile() referencing FILE_NAME which is also passed to openFileOutput(FILE_NAME...) so maybe you have created the file path as a directory before opening that path to write a file.

App crashing when attempting to Write to .json

1 Answers1