Я хочу создать приложение для загрузки изображений из галереи и камеры на мой сервер. Поскольку затем на сервере его нужно будет проанализировать, картинку нужно переименовать в «image.jpg». К сожалению, я не знаком с java и всем остальным, поэтому я собрал разные фрагменты из inte rnet и теперь пытаюсь понять это: -D.
До сих пор я могу выбрать изображение из галереи, сделайте снимок камерой и загрузите его в ImageView. Но после этого я не знаю, как переписать код. Вот моя основная деятельность (проект называется april2 в папке mii):
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Environment;
import android.os.StrictMode;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import static android.provider.ContactsContract.CommonDataKinds.Website.URL;
public class MainActivity extends AppCompatActivity {
Intent intent;
Uri fileUri;
Button btn_choose_image, Upload;
ImageView imageView;
Bitmap bitmap, decoded;
public final int REQUEST_CAMERA = 0;
public final int SELECT_FILE = 1;
private static final String SERVER_ADRESS = "http://1234567";
String mCurrentPhotoPath;
int bitmap_size = 40; // image quality 1 - 100;
int max_resolution_image = 800;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn_choose_image = (Button) findViewById(R.id.btn_choose_image);
Upload = (Button) findViewById(R.id.Upload);
imageView = (ImageView) findViewById(R.id.image_view);
btn_choose_image.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
selectImage();
}
});
Upload.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new uploadToServer();
}
});
}
private void selectImage() {
imageView.setImageResource(0);
final CharSequence[] items = {"Take Photo", "Choose from Library",
"Cancel"};
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Add Photo!");
builder.setIcon(R.mipmap.ic_launcher);
builder.setItems(items, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int item) {
if (items[item].equals("Take Photo")) {
//https://github.com/tungdx/android-media-picker/issues/11
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
fileUri = getOutputMediaFileUri();
intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, fileUri);
startActivityForResult(intent, REQUEST_CAMERA);
} else if (items[item].equals("Choose from Library")) {
intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), SELECT_FILE);
} else if (items[item].equals("Cancel")) {
dialog.dismiss();
}
}
});
builder.show();
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.e("onActivityResult", "requestCode " + requestCode + ", resultCode " + resultCode);
if (resultCode == Activity.RESULT_OK) {
if (requestCode == REQUEST_CAMERA) {
try {
Log.e("CAMERA", fileUri.getPath());
bitmap = BitmapFactory.decodeFile(fileUri.getPath());
setToImageView(getResizedBitmap(bitmap, max_resolution_image));
} catch (Exception e) {
e.printStackTrace();
}
} else if (requestCode == SELECT_FILE && data != null && data.getData() != null) {
try {
// mengambil gambar dari Gallery
bitmap = MediaStore.Images.Media.getBitmap(MainActivity.this.getContentResolver(), data.getData());
setToImageView(getResizedBitmap(bitmap, max_resolution_image));
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
private void setToImageView(Bitmap bmp) {
//compress image
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, bitmap_size, bytes);
decoded = BitmapFactory.decodeStream(new ByteArrayInputStream(bytes.toByteArray()));
//menampilkan gambar yang dipilih dari camera/gallery ke ImageView
imageView.setImageBitmap(decoded);
}
public Bitmap getResizedBitmap(Bitmap image, int maxSize) {
int width = image.getWidth();
int height = image.getHeight();
float bitmapRatio = (float) width / (float) height;
if (bitmapRatio > 1) {
width = maxSize;
height = (int) (width / bitmapRatio);
} else {
height = maxSize;
width = (int) (height * bitmapRatio);
}
return Bitmap.createScaledBitmap(image, width, height, true);
}
public Uri getOutputMediaFileUri() {
return Uri.fromFile(getOutputMediaFile());
}
private static File getOutputMediaFile() {
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "DeKa");
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.e("Monitoring", "Oops! Failed create Monitoring directory");
return null;
}
}
File mediaFile;
mediaFile = new File(mediaStorageDir.getPath() + File.separator + "image" + ".jpg");
return mediaFile;
}
public class uploadToServer extends AsyncTask<Void, Void, String> {
private ProgressDialog pd = new ProgressDialog(MainActivity.this);
protected void onPreExecute() {
super.onPreExecute();
pd.setMessage("Wait image uploading!");
pd.show();
}
@Override
protected String doInBackground(Void... params) {
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("base64", ba1));
nameValuePairs.add(new BasicNameValuePair("ImageName", System.currentTimeMillis() + ".jpg"));
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(URL);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
String st = EntityUtils.toString(response.getEntity());
Log.v("log_tag", "In the try Loop" + st);
} catch (Exception e) {
Log.v("log_tag", "Error in http connection " + e.toString());
}
return "Success";
}
protected void onPostExecute(String result) {
super.onPostExecute(result);
pd.hide();
pd.dismiss();
}
}
private void setPic() {
// Get the dimensions of the View
int targetW = imageView.getWidth();
int targetH = imageView.getHeight();
// Get the dimensions of the bitmap
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inJustDecodeBounds = true;
BitmapFactory.decodeFile(, bmOptions);
int photoW = bmOptions.outWidth;
int photoH = bmOptions.outHeight;
// Determine how much to scale down the image
int scaleFactor = Math.min(photoW / targetW, photoH / targetH);
// Decode the image file into a Bitmap sized to fill the View
bmOptions.inJustDecodeBounds = false;
bmOptions.inSampleSize = scaleFactor;
bmOptions.inPurgeable = true;
Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);
ImageView.setImageBitmap(bitmap);
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = image.getAbsolutePath();
Log.e("Getpath", "Cool" + mCurrentPhotoPath);
return image;
}
}
вот моя activity_main. xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="16dp">
<Button
android:id="@+id/btn_choose_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:drawableLeft="@android:drawable/ic_menu_camera"
android:text="Choose Image" />
<ImageView
android:id="@+id/image_view"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/Upload"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Upload Image" />
</LinearLayout>
и AndroidManifest. xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mii.april2">
<uses-permission android:name="android.permission.CAMERA" />y
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-feature android:name="android.hardware.camera" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".SplashScreen">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainActivity" />
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths" />
</provider>
</application>
</manifest>
Может ты мне поможешь? Я надеюсь, что я не так уж далек от цели. Спасибо!