[英]How to load an image in image view from gallery?
我有一個活動,它有一個按鈕。 當我點擊按鈕時,它會將我重定向到圖片庫。 我想在下一個活動中使用圖像視圖顯示所選圖像。 但它不顯示圖像。 設置圖像時,視圖在屏幕外。
下面給出了我選擇圖像並繼續下一步的代碼。 我在我的活動中沒有使用真實的歷史。
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK
&& null != data) {
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();
if (!(picturePath.equals(""))) {
Intent intent = new Intent();
intent.setClass(MainActivity.this, ImageInGellary.class);
intent.putExtra("picturePath", picturePath);
startActivity(intent);
}
}
}
public class ImageInGellary extends Activity {
Button cancel;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.load_image);
cancel = (Button) findViewById(R.id.buttonCancelPicture);
Intent in = getIntent();
savedInstanceState = in.getExtras();
String picturePath = savedInstanceState.getString("picturePath");
ImageView imageView = (ImageView) findViewById(R.id.img_view);
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
cancel.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
/*
* Intent i = new Intent(Intent.ACTION_PICK,
* android.provider.MediaStore
* .Images.Media.EXTERNAL_CONTENT_URI);
*
* startActivityForResult(i, RESULT_LOAD_IMAGE);
*/
Intent intent = new Intent();
intent.setClass(ImageInGellary.this, MainActivity.class);
startActivity(intent);
}
});
}
}
public class ImageGalleryDemoActivity extends Activity {
private static int RESULT_LOAD_IMAGE = 1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button buttonLoadImage = (Button) findViewById(R.id.buttonLoadPicture);
buttonLoadImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
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();
ImageView imageView = (ImageView) findViewById(R.id.imgView);
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}
}
}
要支持 android 11,您需要在 AndroidMainfest.xml 中添加此代碼
<queries>
<intent>
<action android:name="android.intent.action.GET_CONTENT" />
<data android:mimeType="image/*"/>
</intent>
</queries>
Picasso.with(MainActivity.this).load(data.getData()).noPlaceholder().centerCrop().fit().into((ImageView) findViewById(R.id.imageView1));
完整的解決方案:-
選擇圖像
public void pickImage() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), SELECT_PICTURE);
}
加載圖片
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
//Get ImageURi and load with help of picasso
//Uri selectedImageURI = data.getData();
Picasso.with(MainActivity1.this).load(data.getData()).noPlaceholder().centerCrop().fit()
.into((ImageView) findViewById(R.id.imageView1));
}
}
}
在您的情況下,您需要將 ImageURI 傳遞給下一個活動
Uri selectedImageURI = data.getData();
public void onClick(View view) {
Intent gallery = new Intent(Intent.ACTION_GET_CONTENT);
gallery.setType("image/*");
startActivityForResult(gallery, RESULT_LOAD_IMAGE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK){
Uri imageUri = data.getData();
imgView.setImageURI(imageUri);
}
}
如果沒有任何作用,以下代碼將起作用:
import java.io.FileDescriptor;
import java.io.IOException;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class ImageGalleryDemoActivity extends Activity {
private static int RESULT_LOAD_IMAGE = 1;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button buttonLoadImage = (Button) findViewById(R.id.buttonLoadPicture);
buttonLoadImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
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();
ImageView imageView = (ImageView) findViewById(R.id.imgView);
Bitmap bmp = null;
try {
bmp = getBitmapFromUri(selectedImage);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
imageView.setImageBitmap(bmp);
}
}
private Bitmap getBitmapFromUri(Uri uri) throws IOException {
ParcelFileDescriptor parcelFileDescriptor =
getContentResolver().openFileDescriptor(uri, "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor);
parcelFileDescriptor.close();
return image;
}
}
我已經解決了你的問題。 選擇圖像后,將圖像 Uri 轉換為字符串,然后在第二個類中,將字符串轉換回圖像。
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch(requestCode) {
case SELECT_PHOTO:
if(resultCode == RESULT_OK){
Uri selectedImage = data.getData();
if(selectedImage !=null){
Intent intent=new Intent(MainActivity.this, Activity2.class);
Bundle extras = new Bundle();
extras.putString("image", selectedImage.toString());
intent.putExtras(extras);
startActivity(intent);
}
}
}
Activity2.class
Bundle extras = getIntent().getExtras();
String name = extras.getString("image");
Uri imageFinal=Uri.parse(name);
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