Warning: file_get_contents(/data/phpspider/zhask/data//catemap/3/android/229.json): failed to open stream: No such file or directory in /data/phpspider/zhask/libs/function.php on line 167

Warning: Invalid argument supplied for foreach() in /data/phpspider/zhask/libs/tag.function.php on line 1116

Notice: Undefined index: in /data/phpspider/zhask/libs/function.php on line 180

Warning: array_chunk() expects parameter 1 to be array, null given in /data/phpspider/zhask/libs/function.php on line 181
Android saveToGallery SQLiteDatabase:插入bucket\u id时出错_Android_Mpandroidchart - Fatal编程技术网
Fatal编程技术网
  • android/
  • Android saveToGallery SQLiteDatabase:插入bucket\u id时出错

Android saveToGallery SQLiteDatabase:插入bucket\u id时出错

android

Android saveToGallery SQLiteDatabase:插入bucket\u id时出错,android,mpandroidchart,Android,Mpandroidchart,我无法保存图表。我从saveToGallery中得到错误的返回值，我在日志中看到的是： SQLiteDatabase:插入bucket时出错\u id=-207581635 date\u modified=1544882049 is\u hw\u burst=0 datetake=1 544882049000 bucket\u display\u name=DCIM parent=8 format=14337 storage\u id=65537 media\u type=1 mime\u ty

我无法保存图表。我从
saveToGallery
中得到错误的返回值，我在
日志中看到的是：

SQLiteDatabase:插入bucket时出错\u id=-207581635 date\u modified=1544882049 is\u hw\u burst=0 datetake=1 544882049000 bucket\u display\u name=DCIM parent=8 format=14337 storage\u id=65537 media\u type=1 mime\u type=image/jpeg title=chart.jpg d description=MPAndroidChart Library Save\u data=/storage/simulated/0/DCIM/chart.jpg\u size=33015添加日期=1544882049显示名称=chart.jpg方向=0

我拥有清单中的所有权限，并且还授予了
运行时
权限。
根本原因是什么

这是我在
运行时用于验证的方法


public static void verifyStoragePermissions(Activity activity) {
        // Check if we have write permission
        int permission = ActivityCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE);

    if (permission != PackageManager.PERMISSION_GRANTED) {
        // We don't have permission so prompt the user
        ActivityCompat.requestPermissions(
                activity,
                PERMISSIONS_STORAGE,
                REQUEST_EXTERNAL_STORAGE
        );
    }
}


这用于保存图表：


case R.id.fab_save:
            boolean saved = lineChart.saveToGallery(file_name,100);
                Toast.makeText(getApplicationContext(),"File saved "+saved, Toast.LENGTH_LONG ).show();
            break;



问题在于
文件名的唯一性。例如，它可以是：


`Long tsLong = System.currentTimeMillis()/1000;
                String ts = tsLong.toString();
            boolean saved = lineChart.saveToGallery(file_name+ts,100);`