如何在我的活动中捕获图像并保存在图像视图中？
Posted
技术标签:
【中文标题】如何在我的活动中捕获图像并保存在图像视图中？【英文标题】：How can i capture the image and save in the image view in my activity? 【发布时间】：2012-07-04 15:54:06 【问题描述】：我有一个活动 A，其中有一个按钮和一个图像视图。当我单击按钮时，它应该加载相机并将图像保存在图像视图中。任何人都可以为此提供代码。
提前致谢！！！
【问题讨论】：
*** 不是您的个人编程任务组。请先尝试使用 Google。 把你的代码放在这里..你在你的代码中做了什么？ 【参考方案1】：见下面的代码..它可能会帮助你。
将这两行放在您的按钮单击中..
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
startActivityForResult(intent, 0);
在你的代码中创建这个方法..
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 0 && resultCode == RESULT_OK)
if (data != null)
photo = (Bitmap) data.getExtras().get("data");
add_image.setImageBitmap(photo); /* this is image view where you want to set image*/
Log.d("camera ---- > ", "" + data.getExtras().get("data"));
.................................................. ....................................
以下代码为您提供相机拍摄的 LastImageID。这只是你想要洞图像的额外代码，然后它对你有用。
.................................................. .........................................
private String getLastImageId()
final String[] imageColumns = MediaStore.Images.Media._ID,
MediaStore.Images.Media.DATA ;
final String imageOrderBy = MediaStore.Images.Media._ID + " DESC";
Cursor imageCursor = managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, imageColumns,
null, null, imageOrderBy);
if (imageCursor.moveToFirst())
int id = imageCursor.getInt(imageCursor
.getColumnIndex(MediaStore.Images.Media._ID));
String fullPath = imageCursor.getString(imageCursor
.getColumnIndex(MediaStore.Images.Media.DATA));
imageCursor.close();
return fullPath;
else
return "no path";
【讨论】：
【参考方案2】：您可以创建一个方法来捕获图像并在按钮的 onClickListener 中调用它，如下所示：
public void takePicture(View view)
try
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
catch(Exception e)
e.printStackTrace();
然后像这样重写 onActivityResult 方法：
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
case CAMERA_PIC_REQUEST:
String path=null;
try
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
thumbnail = Bitmap.createScaledBitmap(thumbnail,yourDesiredImageWidth, yourDesiredImageHeight, true);
ImageView imageView = (ImageView) findViewById(R.id.yourImageView);
image.setImageBitmap(thumbnail);
break;
catch(Exception ee)
ee.printStackTrace();
【讨论】：
感谢工作！！【参考方案3】：您的活动代码
public class MainActivity extends Activity
/** Called when the activity is first created. */
Button btnTakePhoto;
ImageView imgTakenPhoto;
private static final int CAM_REQUREST = 1313;
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btnTakePhoto = (Button) findViewById(R.id.button1);
imgTakenPhoto = (ImageView) findViewById(R.id.imageView1);
btnTakePhoto.setOnClickListener(new btnTakePhotoClicker());
@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 && resultCode == RESULT_OK)
if (data != null)
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
imgTakenPhoto.setImageBitmap(thumbnail);
class btnTakePhotoClicker implements Button.OnClickListener
@Override
public void onClick(View v)
// TODO Auto-generated method stub
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
你的布局：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_
android:layout_>
<TextView
android:layout_
android:layout_
android:text="Press the button, capture photo and enjoy!!"
android:id="@+id/textview1"/>
<Button
android:text="Take Photo!"
android:id="@+id/button1"
android:layout_
android:layout_
android:layout_below="@+id/textview1">
</Button>
<ImageView
android:id="@+id/imageView1"
android:layout_
android:layout_
android:src="@drawable/icon"
android:scaleType="centerCrop"
android:layout_below="@+id/button1">
</ImageView>
</RelativeLayout>
【讨论】：
【参考方案4】：CemraImageActivity.java
public class CemraImageActivity extends Activity implements OnClickListener
private int CAMERA_REQUEST;
private ImageView imageView;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.imageView = (ImageView)this.findViewById(R.id.image_capture);
imageView.setOnClickListener(this);
protected void onActivityResult(int requestCode, int resultCode, Intent data)
if(resultCode != 0)
if (requestCode == CAMERA_REQUEST)
Bitmap photo = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(photo);
public void onClick(View v)
// TODO Auto-generated method stub
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_
android:layout_
android:text="Click this image for take a photo"
android:textAppearance="?android:attr/textAppearanceMedium" />
<ImageView
android:id="@+id/image_capture"
android:layout_
android:layout_
android:layout_weight="0.06"
android:src="@drawable/ic_launcher" />
</LinearLayout>
【讨论】：
【参考方案5】：获取单击按钮并在 imageview 中设置商店图像的非常简单的方法。
`公共类 MainActivity 扩展 Activity
private static final int CAMERA_PIC_REQUEST = 22;
Uri cameraUri;
Button BtnSelectImage;
private ImageView ImgPhoto;
private String Camerapath ;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImgPhoto = (ImageView) findViewById(R.id.imageView1);
BtnSelectImage = (Button) findViewById(R.id.button1);
BtnSelectImage.setOnClickListener(new OnClickListener()
@Override
public void onClick(View view)
// TODO Auto-generated method stub
try
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
catch (Exception e)
Toast.makeText(getApplicationContext(), "Couldn't load photo", Toast.LENGTH_LONG).show();
);
@Override
public void onActivityResult(final int requestCode, int resultCode, Intent data)
try
switch (requestCode)
case CAMERA_PIC_REQUEST:
if (resultCode == RESULT_OK)
try
Bitmap photo = (Bitmap) data.getExtras().get("data");
ImgPhoto.setImageBitmap(photo);
catch (Exception e)
Toast.makeText(this, "Couldn't load photo", Toast.LENGTH_LONG).show();
break;
default:
break;
catch (Exception e)
`
设置此清单。
<uses-permission android:name="android.permission.CAMERA" /> <uses-feature android:name="android.hardware.camera" android:required="false"></uses-feature>
【讨论】：
【参考方案6】：你需要在清单中的拳头做到这一点 在 mainactivity.java 之后执行此操作
public class MainActivity extends Activity
Button button;
ImageView photo;
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.btnPhoto);
photo = (ImageView)findViewById(R.id.ivPhoto);
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 = new File(folder,"image.jpg");
return image;
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
String path = "sdcard/camera_app/image.jpg";
photo.setImageDrawable(Drawable.createFromPath(path));
【讨论】：
试一试：
第一步：启动相机拍照：
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, 2);
第 2 步：在onActivityResult 从数据中获取图像
protected void onActivityResult(int requestCode, int resultCode, Intent data)
if (requestCode == CAMERA_REQUEST)
Bitmap photo = (Bitmap) data.getExtras().get("data");
ImageView imageView=(ImageView) findViewbyId(R.id.imgv);
imageView.setImageBitmap(photo);
编辑：和第二种解决方案：
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "temp.jpg")));
startActivityForResult(intent, 2);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
if (resultCode == NONE)
return;
if (requestCode == 2)
File picture = new File(Environment.getExternalStorageDirectory() + "/temp.jpg");
ImageView imgView=(ImageView)findViewById(R.id.imgView);
Uri imgUri=Uri.fromFile(picture);
imageView.setImageURI(imgUri);
【讨论】：
查看我的编辑答案并尝试第二种解决方案，确保您在 Manifast.xml 中具有内部存储权限以上是关于如何在我的活动中捕获图像并保存在图像视图中？的主要内容，如果未能解决你的问题，请参考以下文章
如何显示来自相机的捕获图像并从文件路径显示在图像视图中？ [复制]