android：从图库中选择图像然后裁剪并在图像视图中显示
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android:select image from gallery then crop that and show in an imageview
提问by user3648435
i really need this code and i searched for 3 hours on internet but i couldn't find a complete and simple code and i tested many codes but some didn't work and others wasn't good,please help me with a full and simple code,thank you edit:i have this code for select image but please give me a full code for all things that i said in title because i cant resemble codes.
我真的需要这个代码，我在互联网上搜索了 3 个小时，但我找不到完整和简单的代码，我测试了很多代码，但有些代码不起作用，有些代码不好，请帮助我提供完整而简单的代码代码，谢谢编辑：我有这个选择图像的代码，但请给我一个完整的代码，用于我在标题中所说的所有内容，因为我不能像代码一样。
btn_choose.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Select Picture"),SELECT_PICTURE);
alertDialog1.dismiss();
}
});
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
selectedImagePath1=selectedImagePath;
System.out.println("Image Path : " + selectedImagePath);
image_capture1.setImageURI(selectedImageUri);
}
回答by Dhaval Patel
Hope This Code will help you..
希望此代码对您有所帮助..
Activity To Select The Image From Gallery.
从图库中选择图像的活动。
import java.io.File;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
public class GalleryUtil extends Activity{
private final static int RESULT_SELECT_IMAGE = 100;
public static final int MEDIA_TYPE_IMAGE = 1;
private static final String TAG = "GalleryUtil";
String mCurrentPhotoPath;
File photoFile = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try{
//Pick Image From Gallery
Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_SELECT_IMAGE);
}catch(Exception e){
e.printStackTrace();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch(requestCode){
case RESULT_SELECT_IMAGE:
if (resultCode == Activity.RESULT_OK && data != null && data.getData() != null) {
try{
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
//return Image Path to the Main Activity
Intent returnFromGalleryIntent = new Intent();
returnFromGalleryIntent.putExtra("picturePath",picturePath);
setResult(RESULT_OK,returnFromGalleryIntent);
finish();
}catch(Exception e){
e.printStackTrace();
Intent returnFromGalleryIntent = new Intent();
setResult(RESULT_CANCELED, returnFromGalleryIntent);
finish();
}
}else{
Log.i(TAG,"RESULT_CANCELED");
Intent returnFromGalleryIntent = new Intent();
setResult(RESULT_CANCELED, returnFromGalleryIntent);
finish();
}
break;
}
}
}
Activity To Crop The Selected Image:
裁剪所选图像的活动：
public class ImageSelecter extends Activity{
private final int GALLERY_ACTIVITY_CODE=200;
private final int RESULT_CROP = 400;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
btn_choose.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
//Start Activity To Select Image From Gallery
Intent gallery_Intent = new Intent(getApplicationContext(), GalleryUtil.class);
startActivityForResult(gallery_Intent, GALLERY_ACTIVITY_CODE);
}
});
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == GALLERY_ACTIVITY_CODE) {
if(resultCode == Activity.RESULT_OK){
picturePath = data.getStringExtra("picturePath");
//perform Crop on the Image Selected from Gallery
performCrop(picturePath);
}
}
if (requestCode == RESULT_CROP ) {
if(resultCode == Activity.RESULT_OK){
Bundle extras = data.getExtras();
Bitmap selectedBitmap = extras.getParcelable("data");
// Set The Bitmap Data To ImageView
image_capture1.setImageBitmap(selectedBitmap);
image_capture1.setScaleType(ScaleType.FIT_XY);
}
}
}
private void performCrop(String picUri) {
try {
//Start Crop Activity
Intent cropIntent = new Intent("com.android.camera.action.CROP");
// indicate image type and Uri
File f = new File(picUri);
Uri contentUri = Uri.fromFile(f);
cropIntent.setDataAndType(contentUri, "image/*");
// set crop properties
cropIntent.putExtra("crop", "true");
// indicate aspect of desired crop
cropIntent.putExtra("aspectX", 1);
cropIntent.putExtra("aspectY", 1);
// indicate output X and Y
cropIntent.putExtra("outputX", 280);
cropIntent.putExtra("outputY", 280);
// retrieve data on return
cropIntent.putExtra("return-data", true);
// start the activity - we handle returning in onActivityResult
startActivityForResult(cropIntent, RESULT_CROP);
}
// respond to users whose devices do not support the crop action
catch (ActivityNotFoundException anfe) {
// display an error message
String errorMessage = "your device doesn't support the crop action!";
Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
}
}
}
Edit:Checkout this open source library to Pick image from Gallery or Capture new image with Camera. It will save lot of boilerplate code. https://github.com/Dhaval2404/ImagePicker
编辑：检查此开源库以从图库中选择图像或使用相机捕获新图像。它将节省大量样板代码。https://github.com/Dhaval2404/ImagePicker
回答by siddhartha shankar
I am posting here working code:
我在这里发布工作代码：
private static final int PICK_FROM_GALLERY = 2;
buttonGallery.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
//******call android default gallery
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
//******code for crop image
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 0);
intent.putExtra("aspectY", 0);
try {
intent.putExtra("return-data", true);
startActivityForResult(
Intent.createChooser(intent,"Complete action using"),
PICK_FROM_GALLERY);
} catch (ActivityNotFoundException e) {}
}
});
}
inside onActivityResult
里面 onActivityResult
if (requestCode == PICK_FROM_GALLERY) {
Bundle extras2 = data.getExtras();
if (extras2 != null) {
Bitmap photo = extras2.getParcelable("data");
imgview.setImageBitmap(photo);
}
}
Please try this.
请试试这个。
回答by Ilia
i have a bit different approach
我有一些不同的方法
i use external libraryto mange my downloads the library will load it in the background
我使用外部库管理我的下载库将在后台加载它
this settings allow good performance for list with alot of items and fast scrolling :)
此设置为包含大量项目和快速滚动的列表提供了良好的性能:)
DisplayImageOptions options=new DisplayImageOptions.Builder() .cacheOnDisk(true)
.imageScaleType(ImageScaleType.EXACTLY)
.considerExifParams(true)
.bitmapConfig(Bitmap.Config.RGB_565)
.imageScaleType(ImageScaleType.EXACTLY)
.build();
ImageLoader.getInstance().displayImage(url, imageView, options);
