错误:构造文件(URI)是未定义 [英] Error: The Constructor File(URI) is undefined
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问题描述
我试着写拍照,数据和图像保存到SD卡,我可以读取图像数据,并输出一个活动。但是,我得到了showPhoto()方法的错误构造文件(URI)是不确定的。)。谁能帮助??
进口的java.io.File;
进口java.text.SimpleDateFormat的;
进口java.util.Date;
进口java.util.Locale中;进口android.net.Uri;
进口android.os.Bundle;
进口android.os.Environment;
。进口的Android preference preferenceManager.OnActivityResultListener;
进口android.provider.MediaStore;
进口android.app.Activity;
进口android.content.Intent;
进口android.graphics.Bitmap;
进口android.graphics.BitmapFactory;
进口android.graphics.drawable.BitmapDrawable;
进口android.graphics.drawable.Drawable;
进口android.util.Log;
进口android.view.Menu;
进口android.view.View;
进口android.view.View.OnClickListener;
进口android.widget.Button;
进口android.widget.ImageView;
进口android.widget.Toast;公共类CallCamera延伸活动{
私有静态最后弦乐TAG =CallCamera;
私有静态最终诠释CAPTURE_IMAGE_ACTIVITY_REQ = 0; 乌里了fileURI = NULL;
ImageView的光象= NULL; @覆盖
保护无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_call_camera);
=光象(ImageView的)findViewById(R.id.photo_image);
按钮callCameraButton =(按钮)findViewById(R.id.button_callcamera);
callCameraButton.setOnClickListener(新View.OnClickListener(){ 公共无效的onClick(查看视图){
意图I =新意图(MediaStore.ACTION_IMAGE_CAPTURE);
文件file = getOutputPhotoFile();
了fileURI = Uri.fromFile(getOutputPhotoFile());
i.putExtra(MediaStore.EXTRA_OUTPUT,fileURI所);
startActivityForResult(ⅰ,CAPTURE_IMAGE_ACTIVITY_REQ); //返回照片文件到活动时相机完成
}
//采取SD卡上存储照片
私人文件getOutputPhotoFile(){
文件目录=新File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),getPackageName()); 如果(!directory.exists()){
如果(!directory.mkdirs()){
Log.e(TAG,无法创建存储目录。);
返回null;
}
} //设置照片名称与标准图像目录上的SD卡链接和存储标准时间
字符串的timeStamp =新的SimpleDateFormat(yyyMMdd_HHmmss,Locale.ENGLISH).format(新的Date());
返回新的文件(directory.getPath()+文件分割符+IMG _+ +的timeStamp。JPG);
}
保护无效的onActivityResult(INT申请code,INT结果code,意图数据){
如果(要求code == CAPTURE_IMAGE_ACTIVITY_REQ){
如果(结果code == RESULT_OK){
乌里photoUri = NULL;
如果(数据== NULL){
//确认图像保存
Toast.makeText(CallCamera.this,图像保存成功,Toast.LENGTH_LONG).show();
photoUri = fileURI所;
}其他{
photoUri = data.getData();
Toast.makeText(CallCamera.this,成像的成功保存:+ data.getData(),Toast.LENGTH_LONG).show();
}
photoUri = data.getData();
showPhoto(photoUri); }否则如果(结果code == RESULT_CANCELED){
Toast.makeText(CallCamera.this,已取消,Toast.LENGTH_SHORT).show();
}其他{
Toast.makeText(CallCamera.this!标注图像采集失败,Toast.LENGTH_LONG).show();
}
}
} });
}
保护无效showPhoto(URI photoUri){
文件镜像文件=新的文件(photoUri);
如果(imageFile.exists()){
可拉伸oldDrawable = photoImage.getDrawable();如果(!oldDrawable =空){((BitmapDrawable)oldDrawable).getBitmap()再循环(); }
} 如果(imageFile.exists()){
位图位图= BitmapFactory.de codeFILE(imageFile.getAbsolutePath());
BitmapDrawable绘制=新BitmapDrawable(this.getResources(),位图);
photoImage.setScaleType(ImageView.ScaleType.FIT_CENTER);;
photoImage.setImageDrawable(绘制); } }
解决方案
尝试,而不是做这样的:
文件镜像文件=新的文件(photoUri.getPath());
I'm trying to write an activity that takes a picture and saves the data and image to the sd card where I can read the image data and output it. But, I'm getting an error "Constructor File(Uri) is undefined.") in the showPhoto() method. Can anyone help??
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.preference.PreferenceManager.OnActivityResultListener;
import android.provider.MediaStore;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
public class CallCamera extends Activity {
private static final String TAG = "CallCamera";
private static final int CAPTURE_IMAGE_ACTIVITY_REQ = 0;
Uri fileUri = null;
ImageView photoImage = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_call_camera);
photoImage=(ImageView) findViewById(R.id.photo_image);
Button callCameraButton = (Button)findViewById(R.id.button_callcamera);
callCameraButton.setOnClickListener(new View.OnClickListener(){
public void onClick(View view){
Intent i= new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File file = getOutputPhotoFile();
fileUri=Uri.fromFile(getOutputPhotoFile());
i.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
startActivityForResult(i, CAPTURE_IMAGE_ACTIVITY_REQ); //returns photo file to activity when camera is done
}
//store photo taken on SD card
private File getOutputPhotoFile() {
File directory = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),getPackageName());
if (!directory.exists()){
if(!directory.mkdirs()){
Log.e(TAG,"Failed to create storage directory.");
return null;
}
}
//set photo name with standard time linked and store on sdCard in standard picture directory
String timeStamp = new SimpleDateFormat("yyyMMdd_HHmmss",Locale.ENGLISH).format(new Date());
return new File(directory.getPath() + File.separator + "IMG_"+timeStamp+".jpg");
}
protected void onActivityResult (int requestCode, int resultCode, Intent data){
if (requestCode==CAPTURE_IMAGE_ACTIVITY_REQ){
if(resultCode==RESULT_OK){
Uri photoUri = null;
if (data==null){
//confirming image save
Toast.makeText(CallCamera.this, "Image saved successfully", Toast.LENGTH_LONG).show();
photoUri=fileUri;
} else {
photoUri = data.getData();
Toast.makeText(CallCamera.this, "imaged saved successfully in: " + data.getData(), Toast.LENGTH_LONG).show();
}
photoUri = data.getData();
showPhoto(photoUri);
} else if (resultCode==RESULT_CANCELED) {
Toast.makeText( CallCamera.this,"Cancelled", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(CallCamera.this, "Callout for image capture failed!", Toast.LENGTH_LONG).show();
}
}
}
});
}
protected void showPhoto(Uri photoUri) {
File imageFile = new File(photoUri);
if (imageFile.exists()){
Drawable oldDrawable = photoImage.getDrawable();if(oldDrawable !=null) { ((BitmapDrawable)oldDrawable).getBitmap().recycle();
}
}
if (imageFile.exists()){
Bitmap bitmap = BitmapFactory.decodeFile(imageFile.getAbsolutePath());
BitmapDrawable drawable = new BitmapDrawable(this.getResources(),bitmap);
photoImage.setScaleType(ImageView.ScaleType.FIT_CENTER);;
photoImage.setImageDrawable(drawable);
}
}
解决方案
Try doing this instead:
File imageFile = new File(photoUri.getPath());
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