我有一個 RecyclerView，對于每個項目，您可以啟動 EditActivity（對于結(jié)果）以使用 Firebase 更新您的文本。問題是當你回到 RecyclerView 時，數(shù)據(jù)沒有刷新這是我的適配器的代碼：holder.editBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent edit_intent = new Intent(holder.authorText.getContext(), EditActivity.class); edit_intent.putExtra("text", textList.get(position).getBody()); edit_intent.putExtra("id", textList.get(position).textId); ((Activity) context).startActivityForResult(edit_intent, 1); } }); public void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == 1) { if(resultCode == RESULT_OK){ notifyDataSetChanged(); } } }這是我的 EditActivity 中的代碼：edit_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mProgress.setVisibility(View.VISIBLE); edit_btn.setVisibility(View.INVISIBLE); String new_text = edit_text.getText().toString(); mFirestore.collection("Text").document(text_id).update("body", new_text).addOnCompleteListener(new OnCompleteListener<Void>() { @Override public void onComplete(@NonNull Task<Void> task) { if(task.isSuccessful()){ Toast.makeText(EditActivity.this, R.string.changes, Toast.LENGTH_LONG).show(); Intent intent = new Intent(); intent.putExtra("newText", new_text); setResult(RESULT_OK, intent); finish(); } } }); }});如何用新的 Text 刷新 RecyclerView 和 setText ？
1 回答
largeQ
TA貢獻2039條經(jīng)驗 獲得超8個贊
你做錯的事情很少。
將 clickedItem 位置傳遞給以EditActivity稍后更新它。
holder.editBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent edit_intent = new Intent(holder.authorText.getContext(), EditActivity.class);
edit_intent.putExtra("text", textList.get(position).getBody());
edit_intent.putExtra("id", textList.get(position).textId);
edit_intent.putExtra("position", position);
((Activity) context).startActivityForResult(edit_intent, 1);
}
});
在 中EditActivity，將位置保存在變量中并用新文本返回
setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mProgress.setVisibility(View.VISIBLE);
edit_btn.setVisibility(View.INVISIBLE);
String new_text = edit_text.getText().toString();
mFirestore.collection("Text").document(text_id).update("body", new_text).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if(task.isSuccessful()){
Toast.makeText(EditActivity.this, R.string.changes, Toast.LENGTH_LONG).show();
Intent intent = new Intent();
intent.putExtra("newText", new_text);
//Return the position s well
intent.putExtra("position", position);
setResult(RESULT_OK, intent);
finish();
}
else{
String error = task.getException().getMessage();
Toast.makeText(EditActivity.this, R.string.error + error, Toast.LENGTH_LONG).show();
}
mProgress.setVisibility(View.INVISIBLE);
edit_btn.setVisibility(View.VISIBLE);
}
});
}
});
onActivityResult()在適配器的父活動中覆蓋
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1) {
if(resultCode == RESULT_OK){
String newText = data.getStringExtra("newText");
int itemPosition = data.getIntExtra("position");
//Pass these values to adapter through `updateItem` method
adapter.updateItem(newText, itemPosition);
}
}
}
updateItem在適配器類中定義方法
public void updateItem(String newData, int index)
{
textList.set(index, newData);
adapter.notifyItemChanged(index);
}
干杯 :)
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