我正在创建一个Android应用程序，人们可以将一些文本和图像发布到服务器，然后其他人可以看到照片，但我想改变照片的高度和宽度，但我不知道如何更改。是否应在发送之前更改大小，或者应在从服务器获取后更改大小。如果有人有想法从服务器获取后更改它，请告诉我发布其他课程。 这是我将数据发送到服务器的类。任何帮助！
package naqibshayea.afghanbazaar;
public class insert_ads extends AppCompatActivity {
private String url_insert_Ads , seller1;
private String[] id;
private String[] name;
private EditText title , intro , seller , phone;
private TextView selected_cat , selected_img_txt;
private ImageView selected_img;
private Spinner my_spinner;
private String[] selected_cat_info = new String[2];
ProgressDialog pDialog;
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_insert_ads);
getWindow().getDecorView().setLayoutDirection(View.LAYOUT_DIRECTION_RTL);
Toolbar toolbar = (Toolbar) findViewById( R.id.app_bar );
setSupportActionBar(toolbar);
/*----------------------------------------------------------------------------------------*/
selected_cat = (TextView) findViewById( R.id.txt_insert_ads_selected_cat );
selected_img_txt = (TextView) findViewById( R.id.insert_ads_selected_img_txt );
selected_img = (ImageView) findViewById( R.id.insert_ads_selected_img );
title = (EditText) findViewById( R.id.insert_ads_title );
intro = (EditText) findViewById( R.id.insert_ads_intro );
seller = (EditText) findViewById( R.id.insert_ads_seller );
phone = (EditText) findViewById( R.id.insert_ads_phone );
my_spinner = (Spinner) findViewById(R.id.insert_ads_spinner);
/*----------------------------------------------------------------------------------------*/
Bundle data = getIntent().getExtras();
url_insert_Ads = data.getString("url");
seller1 = data.getString("UNAME");
seller.setText(seller1);
id = data.getStringArray("cat_id");
name = data.getStringArray("cat_name");
ArrayList<String> cats = new ArrayList<>();
for (int i = 0; i < id.length ; i++)
{
cats.add(i , name[i]);
}
ArrayAdapter<String> adb = new ArrayAdapter<String>(this , android.R.layout.simple_list_item_1 , cats);
my_spinner.setAdapter(adb);
my_spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int position, long _id) {
selected_cat_info[0] = id[position];
selected_cat_info[1] = name[position];
selected_cat.setText(name[position]);
}
@Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
});
}
private int my_requestCode = 1;
private Bitmap myBitmap;
private String my_finalImage;
public void onBtnCameraClick(View v)
{
if (getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_ANY))
{
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, my_requestCode);
}
else
{
Toast.makeText(getApplicationContext() , getString(R.string.no_camera_error) ,Toast.LENGTH_LONG).show();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if ( requestCode == my_requestCode && resultCode == RESULT_OK)
{
Bundle e = data.getExtras();
myBitmap = (Bitmap) e.get("data");
show_captured_image();
}
else if (requestCode == My_requestCode_gallery && resultCode == RESULT_OK)
{
Uri image = data.getData();
show_internal_image(image);
}
else
{
Toast.makeText(getApplicationContext() , getString(R.string.get_image_error) ,Toast.LENGTH_LONG).show();
}
}
public void show_captured_image()
{
AlertDialog.Builder imageLoader = new AlertDialog.Builder(this);
LayoutInflater inflater = (LayoutInflater) this.getSystemService(LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.full_screen_image , (ViewGroup) findViewById(R.id.full_img_layout_root));
ImageView bigImage = (ImageView) layout.findViewById(R.id.full_img_img);
bigImage.setImageBitmap(myBitmap);
TextView imageTitle = (TextView) layout.findViewById(R.id.full_image_title);
imageTitle.setText(R.string.captured_img_title);
imageLoader.setView(layout);
imageLoader.setCancelable(false);
imageLoader.setPositiveButton(R.string.captured_img_btn_ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
selected_img.setImageBitmap(myBitmap);
selected_img_txt.setText(R.string.captured_img_is_true);
dialog.dismiss();
}
});
imageLoader.setNegativeButton(R.string.captured_img_btn_again, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
onBtnCameraClick(null);
}
});
imageLoader.setNeutralButton(R.string.btn_Back_to_home, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
imageLoader.create();
imageLoader.show();
}
private int My_requestCode_gallery = 2;
public void onBtnGalleryClick(View v)
{
Intent i = new Intent(Intent.ACTION_PICK , MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, My_requestCode_gallery);
}
public void onImageClick(View v)
{
Intent i = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, My_requestCode_gallery);
}
public void show_internal_image(final Uri imageUri)
{
AlertDialog.Builder imageLoader = new AlertDialog.Builder(this);
LayoutInflater inflater = (LayoutInflater) this.getSystemService(LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.full_screen_image , (ViewGroup) findViewById(R.id.full_img_layout_root));
ImageView bigImage = (ImageView) layout.findViewById(R.id.full_img_img);
bigImage.setImageURI(imageUri);
TextView imageTitle = (TextView) layout.findViewById(R.id.full_image_title);
imageTitle.setText(R.string.captured_img_title);
imageLoader.setView(layout);
imageLoader.setCancelable(false);
imageLoader.setPositiveButton(R.string.captured_img_btn_ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
selected_img.setImageURI(imageUri);
selected_img_txt.setText(R.string.captured_img_is_true);
dialog.dismiss();
}
});
imageLoader.setNegativeButton(R.string.captured_img_btn_again, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
onBtnGalleryClick(null);
}
});
imageLoader.setNeutralButton(R.string.btn_Back_to_home, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
imageLoader.create();
imageLoader.show();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_insert_ads, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.cancel_post)
{
finish();
}
if (id == R.id.share_post)
{
if (title.getText().length() > 1)
{
if (intro.getText().length() > 1)
{
if( seller.getText().length() > 1 )
{
if (phone.getText().length() > 1)
{
if (selected_cat.getText() != getString(R.string.insert_ads_form_sel_cat_text)){
if (selected_img_txt.getText() != getString(R.string.insert_ads_form_error_sel_cat)){
Bitmap image =( (BitmapDrawable) selected_img.getDrawable()).getBitmap();
HashMap<String , String> my_data = new HashMap<>();
my_data.put( "title" , title.getText().toString() );
my_data.put( "intro" , intro.getText().toString() );
my_data.put("seller", seller.getText().toString());
my_data.put("phone", phone.getText().toString());
my_data.put("cat", selected_cat_info[0]);
UploadImage upload = new UploadImage( my_data , image , this );
upload.execute();
}
else
{
Toast.makeText(getApplicationContext() , R.string.insert_ads_form_error_sel_img , Toast.LENGTH_LONG).show();
}
}
else
{
Toast.makeText(getApplicationContext() , R.string.insert_ads_form_error_sel_cat , Toast.LENGTH_LONG).show();
}
}
else
{
phone.setHint(R.string.insert_ads_form_error_hint);
}
}
else
{
seller.setHint( R.string.insert_ads_form_error_hint );
}
}
else
{
intro.setHint(R.string.insert_ads_form_error_hint);
}
}
else
{
title.setHint(R.string.insert_ads_form_error_hint);
}
}
return super.onOptionsItemSelected(item);
}
private class UploadImage extends AsyncTask<Void , Void ,Boolean>
{
private Context main_con;
private HashMap<String , String> main_hm;
private Bitmap main_image;
public UploadImage(HashMap<String , String> hm , Bitmap image , Context con)
{
main_hm = hm;
main_image = image;
main_con = con;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(insert_ads.this);
pDialog.setMessage("درحال آماده سازی");
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Boolean doInBackground(Void... voids)
{
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
main_image.compress(Bitmap.CompressFormat.JPEG , 100 , outputStream);
String encoded_image = Base64.encodeToString(outputStream.toByteArray() , Base64.DEFAULT);
ArrayList<NameValuePair> dataToSend = new ArrayList<>();
dataToSend.add( new BasicNameValuePair("title" , main_hm.get("title") ) );
dataToSend.add( new BasicNameValuePair("intro" , main_hm.get("intro") ) );
dataToSend.add(new BasicNameValuePair("seller" , main_hm.get("seller") ) );
dataToSend.add( new BasicNameValuePair("phone" , main_hm.get("phone") ) );
dataToSend.add( new BasicNameValuePair("cat" , main_hm.get("cat") ) );
dataToSend.add(new BasicNameValuePair("image", encoded_image));
HttpParams myHttpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(myHttpParams, 1000 * 30);
HttpConnectionParams.setSoTimeout(myHttpParams, 1000 * 30);
HttpClient client = new DefaultHttpClient( myHttpParams );
HttpPost post = new HttpPost( url_insert_Ads );
try {
post.setEntity( new UrlEncodedFormEntity( dataToSend , "UTF-8"));
client.execute( post );
return true;
}
catch ( Exception e )
{
/*
* Log.i( "MatiMessage" , "error in posting data -> " + e.toString() );
*/
return false;
}
}
@Override
protected void onPostExecute(Boolean result)
{
pDialog.dismiss();
String message = "";
if( result == true )
{
message = getString( R.string.result_of_insert_message_success );
}
else
{
message = getString( R.string.result_of_insert_message_failure );
}
AlertDialog.Builder alert = new AlertDialog.Builder( main_con );
alert.setCancelable(false);
alert.setTitle(R.string.result_of_insert_title);
alert.setMessage(message);
alert.setPositiveButton(R.string.btn_Back_to_home,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
}
);
alert.create();
alert.show();
}
}
}
答案 0 :(得分：1)
收到你的位图后，调整图像大小并设置到你的imageview。
ImageView iv = (ImageView) findViewById(R.id.imageView);
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.picture);
Bitmap resizedBmp = Bitmap.createScaledBitmap(bitmap, newWidth, newHeight, true);
iv.setImageBitmap(resizedBmp);