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[英]Android:Passing ArrayList of BasicNameValuePairs with intent to another Activity
[英]Android how to display image in Arraylist which intent from another activity?
我有一個MultiplePhotoSelectActivity.java
,它允許用戶選擇多張照片並將路徑存儲在ArrayList中。
public void btnChoosePhotosClick(View v){
ArrayList<String> selectedItems = imageAdapter.getCheckedItems();
if (selectedItems!= null && selectedItems.size() > 0) {
//Toast.makeText(MultiPhotoSelectActivity.this, "Total photos selected: " + selectedItems.size(), Toast.LENGTH_SHORT).show();
Log.d(MultiPhotoSelectActivity.class.getSimpleName(), "Selected Items: " + selectedItems.toString());
Intent intent = new Intent(MultiPhotoSelectActivity.this,PreuploadActivity.class);
intent.putStringArrayListExtra("selectedItems", selectedItems);
setResult(RESULT_OK, intent);
startActivity(intent);
}
}
這是ArrayList<String> selectedItems
來自imageAdapter
ArrayList<String> getCheckedItems() {
ArrayList<String> mTempArry = new ArrayList<>();
for(int i=0;i<mImagesList.size();i++) {
if(mSparseBooleanArray.get(i)) {
mTempArry.add(mImagesList.get(i));
}
}
return mTempArry;
}
用戶選擇照片后,logcat中將顯示以下結果
D / MultiPhotoSelectActivity:選定項:[/storage/emulated/0/Pictures/Screenshot_1486795867.png、/storage/emulated/0/Pictures/15592639_1339693736081458_1539667284_n.jpg、/storage/emulated/0/15592639_1339693736081458_1539667284_n.jpg]
現在的問題是,在用戶選擇圖像后,我想使用數組列表中的文件路徑在另一個活動中顯示圖像
這是PreuploadActivity.java
,應該接收意圖數據。 這是讓用戶在MultiplePhotoSelectActivity.java
選擇照片的按鈕
//this button will open gallery,and select photo
addPhoto.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(PreuploadActivity.this,MultiPhotoSelectActivity.class);
startActivityForResult(intent,PICK_IMAGE_REQUEST);
}
});
這是onActivityResult()
,應從MultiplePhotoSelectActivity.java
接收Intent數據
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data.getData() !=null){
ArrayList<String> selectedItems = data.getStringArrayListExtra("selectedItems");
for(String selectedItem : selectedItems){
Uri filePath = Uri.parse(selectedItem);
try{
// bimatp factory
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
bitmap = BitmapFactory.decodeFile(filePath.getPath(),
options);
//Setting image to ImageView
ImageView imageView = new ImageView(getApplicationContext());
LinearLayout.LayoutParams layoutParams =
new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT);
imageView.setLayoutParams(layoutParams);
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageView.setPadding(0, 0, 0, 10);
imageView.setAdjustViewBounds(true);
imageView.setImageBitmap(bitmap);
linearMain.addView(imageView);
}catch (Exception e) {
e.printStackTrace();
}
}
所以現在在PreuploadActivity.java
onActivityResult()
,我無法顯示從MultiplePhotoSelectActivity.java
發送的ArrayList中的圖像。我懷疑將putExtra放入意圖時出現了問題,到目前為止,我仍然嘗試過,但仍沒有不同。
putParcelable或putSerializable就像答案
所以我需要知道的是
1)我應該如何在兩個Activity中放置putExtra和getExtra,以便發送和接收圖像的ArrayList?
2)顯示圖像的手柄是否正確?如果不正確,請告訴我我做錯了什么。
編輯:嘗試了Aslam Hossin解決方案后,我嘗試了
ArrayList<String> myList = (ArrayList<String>) getIntent().getSerializableExtra("selectedItems ");
查看一些文檔后,我發現我犯了一些錯誤
MultiPhotoSelectActivity.java
Intent intent = new Intent(MultiPhotoSelectActivity.this,PreuploadActivity.class);
intent.putStringArrayListExtra("selectedItems", selectedItems);
setResult(RESULT_OK, intent);
startActivity(intent);
我發現,以上代碼有3個錯誤,
1)在MultiPhotoSelectActivity.java
不應有新意圖,但應將數據發送回PreuploadActivity.java
2)我應該像這樣設置結果
setResult(Activity.RESULT_OK, data);
3)根據以下文檔,所以我在setResult()
之后添加finish()
setResult()
僅在調用finish()后才返回數據。 您需要在調用finish()之前調用setResult(),否則將不會返回任何結果。
我通過在PreuploadActivity.java
設置結果代碼來解決此問題,如下所示
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == PICK_IMAGE_REQUEST && resultCode == Activity.RESULT_OK ){
//setting Activity.RESULT_OK
ArrayList<String> selectedItems = data.getStringArrayListExtra("selectedItems");
這是MultiPhotoSelectActivity.java
我做了以下更改
ArrayList<String> selectedItems = imageAdapter.getCheckedItems();
if (selectedItems!= null && selectedItems.size() > 0) {
//Toast.makeText(MultiPhotoSelectActivity.this, "Total photos selected: " + selectedItems.size(), Toast.LENGTH_SHORT).show();
Log.d(MultiPhotoSelectActivity.class.getSimpleName(), "Selected Items: " + selectedItems.toString());
final Intent data = new Intent();
data.putStringArrayListExtra("selectedItems", selectedItems);
setResult(Activity.RESULT_OK, data);
finish();
}
}
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