Question

如何将相机拍摄的照片通过我的应用程序保存到设备的图库中？

问题是应用程序在拍照后当前崩溃，并且只能在指定的目录中保存单个图像。我是正确的假设应用程序崩溃，因为它不知道保存文件后该怎么办？我如何解决这个问题，返回语句之后的任何内容都是“无法访问的代码”。

代码：

public class Activity_Camera extends Activity implements View.OnClickListener {

        public static final int cameraData = 1;

        ImageButton ib;
        ImageView iv;
        Intent i;
        Bitmap bmp;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_camera);
                initialise();
        }

        private void initialise() {
                iv = (ImageView) findViewById(R.id.ivPicReturn);
                ib = (ImageButton) findViewById(R.id.ibTakePic);

                ib.setOnClickListener(this);
        }

        public void onClick(View v) {
                switch (v.getId()) {
                case R.id.ibTakePic:
                        i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                        //
                        i.putExtra(MediaStore.EXTRA_OUTPUT, getOutputMediaFileUri());              
                        //
                        startActivityForResult(i, cameraData);
                        break;
                }
        }
        //
        private Uri getOutputMediaFileUri() {
            File imagesFolder = new File(Environment.getExternalStorageDirectory(), "DCIM/TradeIt");
            imagesFolder.mkdirs();  
            File image = new File(imagesFolder, "image.jpg");
            Uri uriSavedImage = Uri.fromFile(image);
            return uriSavedImage;


        }
        //
        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
                super.onActivityResult(requestCode, resultCode, data);
                if (resultCode == RESULT_OK) {
                        Bundle extras = data.getExtras();
                        bmp = (Bitmap) extras.get("data");
                        iv.setImageBitmap(bmp);


                }

        }

}

logcat的

W/dalvikvm(919): threadid=1: thread exiting with uncaught exception (group=0x41d7d930) 
03-07 00:00:24.704: E/AndroidRuntime(919): FATAL EXCEPTION: main 
03-07 00:00:24.704: E/AndroidRuntime(919): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {com.hyperlocal.tradeit/com.hyperlocal.tradeit.Activity_Camera}: java.lang.NullPointerException 
03-07 00:00:24.704: E/AndroidRuntime(919): at android.app.ActivityThread.deliverResults(ActivityThread.java:3319)

Answer 1

你必须增加一个变量并保存并将其添加到你的文件名中，以便在你获得Uri时制作更多图片，并且你的图片中显示的图片会这样做：

   sendBroadcast(new Intent(
                Intent.ACTION_MEDIA_MOUNTED,
                Uri.parse("file://" +    Environment.getExternalStorageDirectory())));

如果您在拍摄照片后没有像这样发送广播，则直到下次手机开启时才会更新图库

Android应用程序在图库中保存和存储图像？

1 个答案: