朋友您好我在我的项目中使用以下代码。
权限:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA"/>
XML文件:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="Camera Test" />
<ImageView android:id="@+id/camera_image"
android:layout_width="wrap_content" android:layout_height="wrap_content" />
</LinearLayout>
代码(Java文件):
public class ImageInfo extends Activity {
private static final int CAMERA_PIC_REQUEST = 1111;
private ImageView mImage;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mImage = (ImageView) findViewById(R.id.camera_image);
//1
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, CAMERA_PIC_REQUEST);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(resultCode != RESULT_CANCELED) {
if(requestCode == CAMERA_PIC_REQUEST){
//2
System.out.println("Request"+requestCode+"result"+resultCode);
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
// mImage.setImageBitmap(thumbnail);
//3
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
//4
File file = new File(Environment.getExternalStorageDirectory()+"/saved_images/image.jpeg");
try {
file.createNewFile();
FileOutputStream fo = new FileOutputStream(file);
//5
fo.write(bytes.toByteArray());
fo.close();
Intent intent=new Intent( this,Info.class);
startActivity(intent);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
我成功地能够操作相机并拍摄图像但是正在通过name_date.jpg在Android的DCIM目录(deafult目录)中创建额外的图像副本 请帮助删除所有这些文件。 谢谢&amp;问候.....
答案 0 :(得分:2)
这是您从dcim文件夹中删除文件的问题的完整解决方案。
just copy and paste this method. And call it whenever necessary.
private void deleteLatest() {
// TODO Auto-generated method stub
File f = new File(Environment.getExternalStorageDirectory() + "/DCIM/Camera" );
//Log.i("Log", "file name in delete folder : "+f.toString());
File [] files = f.listFiles();
//Log.i("Log", "List of files is: " +files.toString());
Arrays.sort( files, new Comparator<Object>()
{
public int compare(Object o1, Object o2) {
if (((File)o1).lastModified() > ((File)o2).lastModified()) {
// Log.i("Log", "Going -1");
return -1;
} else if (((File)o1).lastModified() < ((File)o2).lastModified()) {
// Log.i("Log", "Going +1");
return 1;
} else {
// Log.i("Log", "Going 0");
return 0;
}
}
});
//Log.i("Log", "Count of the FILES AFTER DELETING ::"+files[0].length());
files[0].delete();
}
答案 1 :(得分:0)
在线程@vipsy链接中,您可以使用
指定文件路径URIFile fileDir = new File(Environment.getExternalStorageDirectory() +
"/saved_images");
fileDir.mkdirs();
File file = new File(fileDir, "image.jpg");
Uri outputFileUri = Uri.fromFile(file);
intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
这样相机会将图像保存到指定路径而不是DCIM文件夹。 您不必手动复制它,也不必删除任何内容。
编辑:您必须事先在SD卡上创建文件夹,也许这就是问题。否则,这应该有用。
答案 2 :(得分:0)
File fileOrDirectory= new File(Environment.getExternalStorageDirectory() +
"/saved_images");
here fileOrDirectory is a path where you are saving images captured by camera .
you can call this method passing file directory when u need;
void DeleteRecursive(File fileOrDirectory) {
if (fileOrDirectory.isDirectory())
for (File child : fileOrDirectory.listFiles())
DeleteRecursive(child);
fileOrDirectory.delete();
}