Question

好吧我正在创建一个Android应用程序，并使用CAPTURE_PIC_REQUEST拍摄照片并将其作为预览存储在屏幕上的imageviewer中。我想知道如何获取Uri和实际路径，因为我计划获取该信息，保存并稍后访问它。所以我无法想象如何从我刚刚拍摄的那张照片中获取Uri或路径名称。以下是我的活动中正在处理的代码

package com.CS480;

import java.io.File;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class AddEx extends Activity {
  static final int CAMERA_PIC_REQUEST = 1337; 
  public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.add);

    Button camera = (Button) findViewById(R.id.picButton);
    camera.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);               
        }               
    });

}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == CAMERA_PIC_REQUEST) {  
        Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
        ImageView image = (ImageView) findViewById(R.id.returnedPic);  
        image.setImageBitmap(thumbnail);  
    }  
}

}

那么我从应用程序的图像中获取文件位置

Answer 1

据我所知，你可以这样做：

private Uri mImageCaptureUri;

public class AddEx extends Activity {
  static final int CAMERA_PIC_REQUEST = 1337; 
  public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.add);

    Button camera = (Button) findViewById(R.id.picButton);
    camera.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            Intent cameraIntent = 
                    new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            cameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT,
                    mImageCaptureUri);
            startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);               
        }               
    });

}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == CAMERA_PIC_REQUEST) {  
        Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
        ImageView image = (ImageView) findViewById(R.id.returnedPic);  
        image.setImageBitmap(thumbnail);  

        String pathToImage = mImageCaptureUri.getPath();

        // pathToImage is a path you need. 

        // If image file is not in there, 
        //  you can save it yourself manually with this code:
        File file = new File(mImageCaptureUri.getPath());
        FileOutputStream fOut = new FileOutputStream(file);
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fOut); // You can choose any format you want
    }  
}

关于android.provider.MediaStore.EXTRA_OUTPUT的Android文档：

用于表示内容解析程序Uri的Intent-extra的名称用于存储请求的图像或视频。

Answer 2

您可以尝试使用

获取图像的URI

data.getExtras.get("URI");

但这可能不起作用。你可以做的只是自己保存位图。请参阅此问题以获取有关如何执行此操作的指南：Save bitmap to location

Answer 3

拍摄图像时，必须将图像存储在某处以获取图像的位置。

为此，您可以存储到MediaStore：

String result = MediaStore.Images.Media.insertImage(getContentResolver(), bitmap, "", "");

imageFileUri = Uri.parse(result);

Answer 4

尝试此获取图像文件路径表单位图

public void uploadBitmap(Context mContext, Bitmap bitmap) {

    String imagePath = null;
    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
    Uri uri;
    Cursor cursor = mContext.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new String[]{MediaStore.Images.Media.DATA, MediaStore.Images.Media.DATE_ADDED, MediaStore.Images.ImageColumns.ORIENTATION}, MediaStore.Images.Media.DATE_ADDED, null, "date_added DESC");
    if (cursor != null && cursor.moveToFirst()) {
        do {
            uri = Uri.parse(cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA)));
            imagePath = uri.toString();
            Log.d("pathatka", uri.toString());
            break;
        } while (cursor.moveToNext());
        cursor.close();
    }

}

Answer 5

android文档有一个example of defining a file URI for saving the output when you setup the Intent for your image capture。

从ImageView中的图片获取文件路径

5 个答案: