从 DialogFragment 获取值 [英] Get value from DialogFragment

问题描述

我希望 DialogFragment 返回一个在解除时在 editQuantity 中输入的值.

I want the DialogFragment to return a value to me that was entered in editQuantity when dismissed.

但是我没有办法让它工作.我可以通过将值传递给 intent 来做到这一点，但这会破坏当前活动的进度.

But i am not getting any way to make it work. I can do this by passing the value through the intent but that destroys the progress of the current activity.

除了通过intent，还有什么方法可以返回我的值吗?

Is there any way other than passing through intent that will return me value?

package com.example.myprojectname;

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.text.InputType;
import android.util.Log;
import android.widget.EditText;

public class QuantityDialogFragment extends DialogFragment implements OnClickListener { 


    private EditText editQuantity;

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        editQuantity = new EditText(getActivity());
        editQuantity.setInputType(InputType.TYPE_CLASS_NUMBER);

        return new AlertDialog.Builder(getActivity())
        .setTitle(R.string.app_name)
        .setMessage("Please Enter Quantity")
        .setPositiveButton("OK", this)
        .setNegativeButton("CANCEL", null)
        .setView(editQuantity)
        .create();

    }

    @Override
    public void onClick(DialogInterface dialog, int position) {
        String value = editQuantity.getText().toString();
        Log.d("Quantity: ", value);
        dialog.dismiss();       
    }
}

推荐答案

假设你想将结果转发给调用 Activity:) 试试这个代码片段:

Assuming that you want to foward result to the calling Activity:) try this code snippet:

public class QuantityDialogFragment extends DialogFragment implements OnClickListener {

    private EditText editQuantity;

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        editQuantity = new EditText(getActivity());
        editQuantity.setInputType(InputType.TYPE_CLASS_NUMBER);

        return new AlertDialog.Builder(getActivity()).setTitle(R.string.app_name).setMessage("Please Enter Quantity")
                .setPositiveButton("OK", this).setNegativeButton("CANCEL", null).setView(editQuantity).create();

    }

    @Override
    public void onClick(DialogInterface dialog, int position) {
        String value = editQuantity.getText().toString();
        Log.d("Quantity: ", value);
        MainActivity callingActivity = (MainActivity) getActivity();
        callingActivity.onUserSelectValue(value);
        dialog.dismiss();
    }
}

并在您的活动中添加:

public class MainActivity extends FragmentActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        QuantityDialogFragment dialog = new QuantityDialogFragment();
        dialog.show(getSupportFragmentManager(), "Dialog");
    }

    /**
     * callback method from QuantityDialogFragment, returning the value of user
     * input.
     * 
     * @param selectedValue
     */
    public void onUserSelectValue(String selectedValue) {
        // TODO add your implementation.
    }
}

这篇关于从 DialogFragment 获取值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！