这是我的两项活动。我试图在其他活动的图像视图中显示图像。对于相机它的工作正常但是对于图库它不在图像视图中显示。即在图像视图中选择图像后，它似乎是空白的。我在SO上看到了很多答案但是它们都不适用于我。
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Typeface;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
/**
* @author aditya
*/
public class UploadFinding extends BaseActivity {
// LogCat tag
private static final String TAG = UploadFinding.class.getSimpleName();
Bitmap b;
public static final String IMAGE_URL = "imageURL";
// Camera activity request codes
private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100;
private static final int CAMERA_CAPTURE_VIDEO_REQUEST_CODE = 1337;
String mCurrentPhotoPath;
String imgDecodableString;
public static final int MEDIA_TYPE_IMAGE = 1;
public static final int MEDIA_TYPE_VIDEO = 2;
protected static final int RESULT_LOAD_IMAGE = 1;
Button capture_photo, capture_video;
private Uri mFileUri;
TextView textview1,textview2,textview3;
private final Context mContext = this;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/**
* Adding our layout to parent class frame layout.
*/
getLayoutInflater().inflate(R.layout.upload_finding_layout, frameLayout);
//for Design
textview1 = (TextView)findViewById(R.id.textView1);
Typeface face1= Typeface.createFromAsset(getAssets(), "fonts/AlexBrush-Regular.ttf");
textview1.setTypeface(face1);
textview2 = (TextView)findViewById(R.id.textView2);
Typeface face2= Typeface.createFromAsset(getAssets(), "fonts/AlexBrush-Regular.ttf");
textview2.setTypeface(face2);
textview3 = (TextView)findViewById(R.id.textView3);
Typeface face3= Typeface.createFromAsset(getAssets(), "fonts/AlexBrush-Regular.ttf");
textview3.setTypeface(face3);
capture_photo = (Button) findViewById(R.id.capture_photo);
capture_video = (Button) findViewById(R.id.capture_video);
capture_photo.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(UploadFinding.this);
alertDialogBuilder.setTitle("Capture");
alertDialogBuilder.setPositiveButton("From Camera",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent cameraIntent = new Intent(
MediaStore.ACTION_IMAGE_CAPTURE);
mFileUri = getOutputMediaFileUri(1);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, mFileUri);
startActivityForResult(cameraIntent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE);
}
})
.setNegativeButton("From Gallery", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent i = new Intent(Intent.ACTION_PICK,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
mFileUri = getOutputMediaFileUri(1);
i.putExtra(MediaStore.EXTRA_OUTPUT, mFileUri);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
}
});
//End Btn_Click
// For Camera
capture_video.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(UploadFinding.this);
alertDialogBuilder.setTitle("Capture");
alertDialogBuilder.setPositiveButton("From Camera",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_VIDEO_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_DURATION_LIMIT, 5);
mFileUri = getOutputMediaFileUri(2);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, mFileUri);
cameraIntent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
cameraIntent.putExtra(MediaStore.EXTRA_DURATION_LIMIT, 10);
startActivityForResult(cameraIntent, CAMERA_CAPTURE_VIDEO_REQUEST_CODE);
}
})
.setNegativeButton("From Gallery", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent i = new Intent(Intent.ACTION_PICK,
MediaStore.Video.Media.EXTERNAL_CONTENT_URI);
i.putExtra(MediaStore.EXTRA_OUTPUT, mFileUri);
startActivityForResult(i, RESULT_LOAD_IMAGE);
finish();
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
}
});
/**
* Setting title and itemChecked
*/
mDrawerList.setItemChecked(position, true);
setTitle(listArray[position]);
}
/**
* Here we store the file url as it will be null after returning from camera
* app
*/
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
// save file url in bundle as it will be null on screen orientation
// changes
outState.putParcelable("file_uri", mFileUri);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
// get the file url
mFileUri = savedInstanceState.getParcelable("file_uri");
}
//
//
//multipart
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// if the result is capturing Image
if (requestCode == CAMERA_CAPTURE_IMAGE_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
// successfully captured the image
// launching upload activity
launchUploadActivity(true);
} else if (resultCode == RESULT_CANCELED) {
// user cancelled Image capture
Toast.makeText(getApplicationContext(),
"User cancelled image capture", Toast.LENGTH_SHORT)
.show();
} else {
// failed to capture image
Toast.makeText(getApplicationContext(),
"Sorry! Failed to capture image", Toast.LENGTH_SHORT)
.show();
}
} else if (requestCode == CAMERA_CAPTURE_VIDEO_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
// video successfully recorded
// launching upload activity
launchUploadActivity1(true);
} else if (resultCode == RESULT_CANCELED) {
// user cancelled recording
Toast.makeText(getApplicationContext(),
"User cancelled video recording", Toast.LENGTH_SHORT)
.show();
} else {
// failed to record video
Toast.makeText(getApplicationContext(),
"Sorry! Failed to record video", Toast.LENGTH_SHORT)
.show();
}
}
if(requestCode==RESULT_LOAD_IMAGE){
if (resultCode == RESULT_OK) {
launchUploadActivity2(true);
}
}
// {
}
private void launchUploadActivity(boolean isImage) {
Intent i = new Intent(UploadFinding.this, Finding_Preview_Image.class);
i.putExtra("filePath", mFileUri.getPath());
i.putExtra("isImage", isImage);
startActivity(i);
}
private void launchUploadActivity1(boolean isImage) {
Intent i = new Intent(UploadFinding.this, Finding_preview_video.class);
i.putExtra("filePath", mFileUri.getPath());
i.putExtra("isImage", isImage);
startActivity(i);
}
private void launchUploadActivity2(boolean isImage) {
Intent i = new Intent(UploadFinding.this, Finding_Preview_Image.class);
i.putExtra("filePath", mFileUri.getPath());
i.putExtra("isImage", isImage);
startActivity(i);
}
private Uri getOutputMediaFileUri(int type) {
return Uri.fromFile(getOutputMediaFile(type));
}
// Return image / video
private static File getOutputMediaFile(int type) {
// External sdcard location
File mediaStorageDir = new File(
Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
Config.IMAGE_DIRECTORY_NAME);
// // Save a file: path for use with ACTION_VIEW intents
// mCurrentPhotoPath = "file:" + image.getAbsolutePath();
// return image;
// Create the storage directory if it does not exist
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d(TAG, "Oops! Failed create "
+ Config.IMAGE_DIRECTORY_NAME + " directory");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
Locale.getDefault()).format(new Date());
File mediaFile;
if (type == MEDIA_TYPE_IMAGE) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ "IMG_" + timeStamp + ".jpg");
} else if (type == MEDIA_TYPE_VIDEO) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ "VID_" + timeStamp + ".mp4");
}
else {
return null;
}
return mediaFile;
}
}
下一个活动
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.Toast;
import android.widget.VideoView;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import java.io.File;
import java.io.IOException;
public class Finding_Preview_Image extends BaseActivity {
private Button finding_upload_button;
// private ImageView photo;
// multipart
// LogCat tag
private static final String TAG = UploadFinding.class.getSimpleName();
private ProgressBar progressBar;
private String filePath = null;
// private TextView txtPercentage;
private ImageView photo;
private EditText fullname;
private VideoView vidPreview;
private Button Finding_upload_button;
long totalSize = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getLayoutInflater().inflate(R.layout.finding__preview_image, frameLayout);
finding_upload_button = (Button) findViewById(R.id.finding_upload_button);
photo = (ImageView) findViewById(R.id.find_Image);
fullname = (EditText) findViewById(R.id.editText);
EditText fullname = (EditText) findViewById(R.id.editText);
EditText location = (EditText) findViewById(R.id.editText2);
EditText description = (EditText) findViewById(R.id.editText3);
ImageView photo = (ImageView) findViewById(R.id.find_Image);
//multipart
// txtPercentage = (TextView) findViewById(R.id.txtPercentage);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
// vidPreview = (VideoView) findViewById(R.id.videoPreview);
// Receiving the data from previous activity
Intent i = getIntent();
// image or video path that is captured in previous activity
filePath = i.getStringExtra("filePath");
// boolean flag to identify the media type, image or video
boolean isImage = i.getBooleanExtra("isImage", true);
if (filePath != null) {
// Displaying the image or video on the screen
Log.i("UploadApp", "file path is null");
previewMedia(isImage);
} else {
Toast.makeText(getApplicationContext(),
"Sorry, file path is missing!", Toast.LENGTH_LONG).show();
}
finding_upload_button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// uploading the file to server
new UploadFileToServer().execute();
}
});
}
//
//Displaying captured image/video on the screen
private void previewMedia(boolean isImage) {
// Checking whether captured media is image or video
if (isImage) {
photo.setVisibility(View.VISIBLE);
// vidPreview.setVisibility(View.GONE);
// bimatp factory
BitmapFactory.Options options = new BitmapFactory.Options();
// down sizing image as it throws OutOfMemory Exception for larger
// images
options.inSampleSize = 88;
final Bitmap bitmap = BitmapFactory.decodeFile(filePath, options);
options.inJustDecodeBounds = true;
photo.setImageBitmap(bitmap);
}
//else {
// photo.setVisibility(View.GONE);
// vidPreview.setVisibility(View.VISIBLE);
// vidPreview.setVideoPath(filePath);
// // start playing
// vidPreview.start();
// }
}
/**
* Uploading the file to server
* */
private class UploadFileToServer extends AsyncTask<Void, Integer, String> {
@Override
protected void onPreExecute() {
// setting progress bar to zero
progressBar.setProgress(0);
super.onPreExecute();
}
@Override
protected void onProgressUpdate(Integer... progress) {
// Making progress bar visible
progressBar.setVisibility(View.VISIBLE);
// updating progress bar value
progressBar.setProgress(progress[0]);
// updating percentage value
// txtPercentage.setText(String.valueOf(progress[0]) + "%");
}
@Override
protected String doInBackground(Void... params) {
return uploadFile();
}
@SuppressWarnings("deprecation")
private String uploadFile() {
String responseString = null;
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(Config.FILE_UPLOAD_URL);
Log.i("UploadApp", "upload url: " + Config.FILE_UPLOAD_URL);
AndroidMultiPartEntity entity;
entity = new AndroidMultiPartEntity(
new AndroidMultiPartEntity.ProgressListener() {
@Override
public void transferred(long num) {
publishProgress((int) ((num / (float) totalSize) * 100));
}
});
File sourceFile;
sourceFile = new File(filePath);
Log.i("UploadApp", "file path: " + filePath);
// Adding file data to http body
entity.addPart("image", new FileBody(sourceFile));
entity.addPart("fullname", new StringBody(fullname.getText().toString()));
totalSize = entity.getContentLength();
httppost.setEntity(entity);
// Making server call
HttpResponse response = httpclient.execute(httppost);
HttpEntity r_entity = response.getEntity();
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == 200) {
// Server response
responseString = EntityUtils.toString(r_entity);
} else {
responseString = "Error occurred! Http Status Code: "
+ statusCode;
}
} catch (ClientProtocolException e) {
responseString = e.toString();
Log.e("UploadApp", "exception: " + responseString);
} catch (IOException e) {
responseString = e.toString();
Log.e("UploadApp", "exception: " + responseString);
}
return responseString;
}
@Override
protected void onPostExecute(String result) {
Log.e(TAG, "Response from server: " + result);
// showing the server response in an alert dialog
showAlert(result);
super.onPostExecute(result);
}
}
/**
* Method to show alert dialog
* */
private void showAlert(String message) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(message).setTitle("Response from Servers")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// do nothing
}
});
AlertDialog alert = builder.create();
alert.show();
}
}
答案 0 :(得分：0)
将其用于图库中的图片
启动图库意图并选择图像
Intent galleryIntent = new Intent();
galleryIntent.setType("image/*");
galleryIntent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(galleryIntent, RESULT_LOAD_IMAGE);
然后进入活动结果
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if(requestCode==RESULT_LOAD_IMAGE){
mFileUri=data.getData();
launchUploadActivity2(true);
}
}
}
在launchUploadActivity2（true）
中 String realPath=getPath(this, mFileUri)
i.putExtra("filePath", realPath);