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私はアンドロイドデバイスの内部ストレージに空のjsonファイルを持っています。私は オブジェクトと配列を持つ空のjsonファイルを書き込む方法は？
{
"data": [
]
}
jsonデータのフォーマットを流してそれを書く必要がありますか？
は、私は、私がやりたい次のスニペットを試してみました
BufferedWriter bufferedWriter = null;
FileWriter fileWriter = null;
JSONObject JsonObject = new JSONObject();
JSONArray array = new JSONArray();
try {
JsonObject.put("data",array);
fileWriter = new FileWriter(file);
bufferedWriter = new BufferedWriter(fileWriter);
bufferedWriter.write(JsonObject.toString());
} catch (JSONException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
しかし、何もファイルに書き込まれていない、Logcatは
11-22 16:27:43.833 26727-26727/? I/art: Late-enabling -Xcheck:jni
11-22 16:27:43.849 26727-26735/? E/art: Failed sending reply to debugger: Broken pipe
11-22 16:27:43.849 26727-26735/? I/art: Debugger is no longer active
11-22 16:27:43.849 26727-26735/? I/art: Starting a blocking GC Instrumentation
11-22 16:27:43.942 26727-26727/? W/System: ClassLoader referenced unknown path: /data/app/com.diary.pocket.pocketdiary-2/lib/arm64
11-22 16:27:43.953 26727-26727/? I/InstantRun: starting instant run server: is main process
11-22 16:27:43.956 26727-26727/? V/Font: Change font:1
11-22 16:27:44.003 26727-26727/? W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
11-22 16:27:44.105 26727-26745/? I/Adreno: QUALCOMM build : 853a1ff, I9c435c2712
Build Date : 01/10/17
OpenGL ES Shader Compiler Version: XE031.09.00.04
Local Branch :
Remote Branch :
Remote Branch :
Reconstruct Branch :
11-22 16:27:44.109 26727-26745/? I/OpenGLRenderer: Initialized EGL, version 1.4
11-22 16:27:44.109 26727-26745/? D/OpenGLRenderer: Swap behavior 1
11-22 16:27:45.286 26727-26760/com.diary.pocket.pocketdiary D/AppTracker: App Event: start
11-22 16:27:45.866 26727-26735/? I/art: Ignoring second debugger -- accepting and dropping
11-22 16:27:46.107 26727-26777/? D/AppTracker: App Event: stop
11-22 16:27:46.158 26727-26727/? V/BoostFramework: mAcquireFunc method = public int com.qualcomm.qti.Performance.perfLockAcquire(int,int[])
11-22 16:27:46.158 26727-26727/? V/BoostFramework: mReleaseFunc method = public int com.qualcomm.qti.Performance.perfLockRelease()
11-22 16:27:46.158 26727-26727/? V/BoostFramework: mAcquireTouchFunc method = public int com.qualcomm.qti.Performance.perfLockAcquireTouch(android.view.MotionEvent,android.util.DisplayMetrics,int,int[])
11-22 16:27:46.158 26727-26727/? V/BoostFramework: mIOPStart method = public int com.qualcomm.qti.Performance.perfIOPrefetchStart(int,java.lang.String)
11-22 16:27:46.158 26727-26727/? V/BoostFramework: mIOPStop method = public int com.qualcomm.qti.Performance.perfIOPrefetchStop()
11-22 16:27:46.161 26727-26727/? V/BoostFramework: BoostFramework() : mPerf = [email protected]
11-22 16:27:46.161 26727-26727/? V/BoostFramework: BoostFramework() : mPerf = [email protected]
11-22 16:27:46.162 26727-26727/? V/BoostFramework: BoostFramework() : mPerf = [email protected]
11-22 16:27:46.162 26727-26727/? V/BoostFramework: BoostFramework() : mPerf = [email protected]
11-22 16:27:46.251 26727-26727/? V/BoostFramework: BoostFramework() : mPerf = [email protected]
11-22 16:27:46.251 26727-26727/? V/BoostFramework: BoostFramework() : mPerf = [email protected]
11-22 16:27:46.323 26727-26727/? V/BoostFramework: BoostFramework() : mPerf = [email protected]
11-22 16:27:46.331 26727-26727/? V/BoostFramework: BoostFramework() : mPerf = [email protected]
11-22 16:27:46.331 26727-26727/? V/BoostFramework: BoostFramework() : mPerf = [email protected]
11-22 16:27:46.340 26727-26744/? D/AppTracker: App Event: start
11-22 16:27:46.475 26727-26727/? W/art: Before Android 4.1, method int android.support.v7.widget.ListViewCompat.lookForSelectablePosition(int, boolean) would have incorrectly overridden the package-private method in android.widget.ListView
11-22 16:27:48.941 26727-26727/? V/BoostFramework: BoostFramework() : mPerf = [email protected]
はこれで私を助けて、同様です。事前に感謝します
あなたを助けるだろう「ファイル」であなたのパスは何ですか？願っていますか – Dhruv
@DhruvPatel 'ファイルファイル=新しいファイル（getActivity（）.getExternalFilesDir（"/appointments "）、" appointments.json "）;' – ChyperX