Android 6.0手機存儲圖片以及下載apk需要申請動態權限

由於Android6.0有着更高的隱私權，所以在存儲SD卡要動態申請權限

if (ContextCompat.checkSelfPermission(getApplicationContext(), android.Manifest.permission.WRITE_EXTERNAL_STORAGE)== PackageManager.PERMISSION_GRANTED){
    download();
}else {
    //申請權限
    ActivityCompat.requestPermissions(UpgradeActivity.this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},REQUESTCODE);
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (requestCode==REQUESTCODE){
        if (grantResults.length>0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
            download();
        }else {
            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle("提示");
            builder.setMessage("當前應用沒有存儲權限,不能使用分享功能，請前往設置");
            builder.setNegativeButton("知道了", null);
            builder.setPositiveButton("設置", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    startAppSettings();
                }
            });
            builder.setCancelable(false);
            builder.show();
        }
    }
}
/**
 * 啓動應用的設置 來手動開啓權限
 */
private void startAppSettings() {
    Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS);
    intent.setData(Uri.parse("package:" + getPackageName()));
    startActivity(intent);
}