Wie nehmen Sie ein Foto, speichern Sie es und erhalten Sie das Foto in Android

gibt es mehrere Beispiel zu Bild erfassen und speichern Sie es, und öffnen Sie es...

1. Android-Kamera-API - Tutorial

2. Android-Entwickler

3. Kamera Beispiel auf Github

4. Ein Weiteres Beispiel

InformationsquelleAutor SilentKiller

bitte verwenden Sie den folgenden code.

package com.example.stackoverflow;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.math.BigInteger;
import java.security.SecureRandom;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.GridView;
import android.widget.ImageView;

public class MyCameraActivity extends Activity {
    private static final int CAMERA_REQUEST = 1888; 



    static String str_Camera_Photo_ImagePath = "";
    private static File f;
    private static int Take_Photo = 2;
    private static String str_randomnumber = "";
    static String str_Camera_Photo_ImageName = "";
    public static String str_SaveFolderName;
    private static File wallpaperDirectory;
    Bitmap bitmap;
    int storeposition = 0;
    public static GridView gridview;
    public static ImageView imageView;



    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.ccccc);
        this.imageView = (ImageView)this.findViewById(R.id.imageView1);
        Button photoButton = (Button) this.findViewById(R.id.button1);
        photoButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                str_SaveFolderName = Environment
                        .getExternalStorageDirectory()
                        .getAbsolutePath()
                        + "/rajeshsample";
                str_randomnumber = String.valueOf(nextSessionId());
                wallpaperDirectory = new File(str_SaveFolderName);
                if (!wallpaperDirectory.exists())
                    wallpaperDirectory.mkdirs();
                str_Camera_Photo_ImageName = str_randomnumber
                        + ".jpg";
                str_Camera_Photo_ImagePath = str_SaveFolderName
                        + "/" + str_randomnumber + ".jpg";
                System.err.println(" str_Camera_Photo_ImagePath  "
                        + str_Camera_Photo_ImagePath);
                f = new File(str_Camera_Photo_ImagePath);
                startActivityForResult(new Intent(
                        MediaStore.ACTION_IMAGE_CAPTURE).putExtra(
                        MediaStore.EXTRA_OUTPUT, Uri.fromFile(f)),
                        Take_Photo);
                System.err.println("f  " + f);
            }
        });
    }


    //used to create randon numbers
    public String nextSessionId() {
        SecureRandom random = new SecureRandom();
        return new BigInteger(130, random).toString(32);
    }


    protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
        if (requestCode == Take_Photo) {
            String filePath = null;

            filePath = str_Camera_Photo_ImagePath;
            if (filePath != null) {
                Bitmap faceView = ( new_decode(new File(
                                filePath))); //========================> good
                                                //lines



                imageView.setImageBitmap(faceView);

            } else {
                bitmap = null;
            }
        }
    } 

    public static Bitmap new_decode(File f) {

        //decode image size

        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        o.inDither = false; //Disable Dithering mode

        o.inPurgeable = true; //Tell to gc that whether it needs free memory,
                                //the Bitmap can be cleared

        o.inInputShareable = true; //Which kind of reference will be used to
                                    //recover the Bitmap data after being
                                    //clear, when it will be used in the future
        try {
            BitmapFactory.decodeStream(new FileInputStream(f), null, o);
        } catch (FileNotFoundException e1) {
            //TODO Auto-generated catch block
            e1.printStackTrace();
        }

        //Find the correct scale value. It should be the power of 2.
        final int REQUIRED_SIZE = 300;
        int width_tmp = o.outWidth, height_tmp = o.outHeight;
        int scale = 1;
        while (true) {
            if (width_tmp / 1.5 < REQUIRED_SIZE && height_tmp / 1.5 < REQUIRED_SIZE)
                break;
            width_tmp /= 1.5;
            height_tmp /= 1.5;
            scale *= 1.5;
        }

        //decode with inSampleSize
        BitmapFactory.Options o2 = new BitmapFactory.Options();
        //o2.inSampleSize=scale;
        o.inDither = false; //Disable Dithering mode

        o.inPurgeable = true; //Tell to gc that whether it needs free memory,
                                //the Bitmap can be cleared

        o.inInputShareable = true; //Which kind of reference will be used to
                                    //recover the Bitmap data after being
                                    //clear, when it will be used in the future
        //return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
        try {

//         return BitmapFactory.decodeStream(new FileInputStream(f), null,
//                 null);
            Bitmap bitmap= BitmapFactory.decodeStream(new FileInputStream(f), null, null);
            System.out.println(" IW " + width_tmp);
            System.out.println("IHH " + height_tmp);           
               int iW = width_tmp;
                int iH = height_tmp;

               return Bitmap.createScaledBitmap(bitmap, iW, iH, true);

        } catch (OutOfMemoryError e) {
            //TODO: handle exception
            e.printStackTrace();
            //clearCache();

            //System.out.println("bitmap creating success");
            System.gc();
            return null;
            //System.runFinalization();
            //Runtime.getRuntime().gc();
            //System.gc();
            //decodeFile(f);
        } catch (FileNotFoundException e) {
            //TODO Auto-generated catch block
            e.printStackTrace();
            return null;
        }

    }

}

XML :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="photo" >
    </Button>

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_action_search" >
    </ImageView>

</LinearLayout>

InformationsquelleAutor itsrajesh4uguys