Question

我正在做一个简单的Android相机应用程序，捕获一张图片，然后显示它。捕获部分正在工作，但我不能在imageview.there显示它没有任何错误，但在其中一个logcat声明这

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string xml =
                "<Root>" +
                "<RNC id=\"00\">" +
                    "<abc1>" +
                    "</abc1>" +
                    "<abc2>" +
                    "</abc2>" +
                "</RNC>" +
                "<RNC id=\"01\">" +
                    "<abc3>" +
                    "</abc3>" +
                    "<abc4>" +
                    "</abc4>" +
                "</RNC>" +
                "<RNC id=\"01\">" +
                    "<abc5>" +
                    "</abc5>" +
                    "<abc6>" +
                    "</abc6>" +
                "</RNC>" +
                "</Root>";

            XElement root = XElement.Parse(xml);

            var groups = root.Elements("RNC").GroupBy(x => x.Attribute("id").Value).ToList();

            foreach (var group in groups)
            {
                if (group.Count() > 1)
                {
                    var all = group.AsEnumerable().ToList();
                    for (int index = all.Count() - 2; index >= 0; index--)
                    {
                        all[index].Add(all[index + 1].Elements());
                        all[index + 1].RemoveAll();
                    }
                }


            }
        }
    }
}

MainActivity.java

Bitmap too large to be uploaded into a texture (3120x4208, max=4096x4096)

activity_main.xml中

import android.app.Activity;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import java.io.File;

public class MainActivity extends Activity {

    Button button;
    ImageView imageView;
    static final int CAM_REQUEST = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = (Button) findViewById(R.id.button);
        imageView = (ImageView) findViewById(R.id.image_view);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent camera_intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                File file = getfile();
                camera_intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
                startActivityForResult(camera_intent,CAM_REQUEST);

            }
        });
    }

    private File getfile(){

        File folder = new File("sdcard/camera_app");

        if(!folder.exists()){
            folder.mkdir();
        }

        File image_file = new File (folder, "cam_image.jpg");
        return image_file;
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        String path = "sdcard/camera_app/cam_image.jpg";
        imageView.setImageDrawable(Drawable.createFromPath(path));

    }
}

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.lala.camera.MainActivity"
    android:orientation="vertical">

    <Button
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:text="Capture Image"
        android:id="@+id/button"
        android:layout_gravity="center_horizontal"
        />

    <ImageView
        android:layout_width="350dp"
        android:layout_height="300dp"
        android:id="@+id/image_view"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="20dp"
        />

</LinearLayout>

Answer 1

您的图片太大，您必须调整它的大小。试试这个：

imageView.setImageDrawable(resize(Drawable.createFromPath(path)));

private Drawable resize(Drawable image) {
    Bitmap bitmap = ((BitmapDrawable)image).getBitmap();
    Bitmap bitmapResized = Bitmap.createScaledBitmap(bitmap , WIDTH, HEIGHT, false);
    return new BitmapDrawable(getResources(), bitmapResized);
}

捕获图像不会在imageview中显示

1 个答案: