写真を撮る簡単な例を探し、URIを使用して保存し、画像処理のために写真を取得しました。多くのサンプルコードを試しましたが、どれもスムーズに進みませんでした。
サンプルコードを持っている人はいますか？
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60196 次
4 に答える
14
このような変数を定義します
protected static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 0;
Android からカメラを呼び出すためのコードを使用します。
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
imageUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(),"fname_" +
String.valueOf(System.currentTimeMillis()) + ".jpg"));
intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
これを呼び出すクラスで onActivityResult 関数をオーバーライドし、以下のコードを入力します。
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
//use imageUri here to access the image
Bundle extras = data.getExtras();
Log.e("URI",imageUri.toString());
Bitmap bmp = (Bitmap) extras.get("data");
// here you will get the image as bitmap
}
else if (resultCode == RESULT_CANCELED) {
Toast.makeText(this, "Picture was not taken", Toast.LENGTH_SHORT);
}
}
}
于 2013-01-04T09:23:04.443 に答える
6
于 2013-01-04T09:23:52.943 に答える
-1
次のコードを使用してください。
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>
于 2013-01-04T09:22:04.227 に答える