android将文本从一类带到alertdialog

Question

我想将文本从一个类中的编辑文本传送到另一个显示警告对话框的类。 我想输入edittext名称并将其放入警报对话框消息中。

public class forum extends Activity {

EditText name, place;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    name = (EditText) findViewById(R.id.name);
    place = (EditText) findViewById(R.id.place);

二等

public class AlertDemo extends DialogFragment {

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {

    /** Turn Screen On and Unlock the keypad when this alert dialog is displayed */
    getActivity().getWindow().addFlags(LayoutParams.FLAG_TURN_SCREEN_ON | LayoutParams.FLAG_DISMISS_KEYGUARD);

    /** Creating a alert dialog builder */
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

    /** Setting title for the alert dialog */
    builder.setTitle("alert");

    /** Setting the content for the alert dialog */
    builder.setMessage("alerting");

    /** Defining an OK button event listener */
    builder.setPositiveButton("alert", new OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            /** Exit application on click OK */
            getActivity().finish();
        }
    });

    /** Creating the alert dialog window */
    return builder.create();
}

Answer 1

您可以使用 DialogFragment.setArguments & getArguments 方法

示例代码如下，

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="${packageName}.${activityClass}" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/name"
        android:layout_alignBottom="@+id/name"
        android:layout_alignParentLeft="true"
        android:text="Name" />

    <EditText
        android:id="@+id/name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView2"
        android:layout_marginLeft="52dp"
        android:ems="10"
        android:inputType="textPersonName" >

        <requestFocus />
    </EditText>

    <EditText
        android:id="@+id/place"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/name"
        android:layout_below="@+id/name"
        android:layout_marginTop="16dp"
        android:ems="10"
        android:inputType="textPersonName" />

    <TextView
        android:id="@+id/TextView01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/place"
        android:layout_alignBottom="@+id/place"
        android:layout_alignParentLeft="true"
        android:text="Place" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/place"
        android:layout_marginTop="18dp"
        android:text="ShowAlertDemo"
        android:onClick="buttonClick" />

</RelativeLayout>

MainActivity.java

package com.example.test;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {

    EditText name, place;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        name = (EditText) findViewById(R.id.name);
        place = (EditText) findViewById(R.id.place);

        final Button button = (Button) findViewById(R.id.button1);
          button.setOnClickListener(new View.OnClickListener() {
                 public void onClick(View v) {
                    Toast.makeText(getApplicationContext(), "Button Clicked", Toast.LENGTH_LONG).show();

                    String nameText = name.getText().toString();
                    String placeText = place.getText().toString();

                    AlertDemo a = new AlertDemo();


                    Bundle args = new Bundle();
                    args.putString("nameText", nameText);
                    args.putString("placeText", nameText);

                    a.setArguments(args);

                     a.show(getFragmentManager(), "Confirm");
                 }
             });
    }


}

AlertDemo.java

package com.example.test;


import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.view.WindowManager.LayoutParams;


public class AlertDemo extends DialogFragment {

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {

    /** Turn Screen On and Unlock the keypad when this alert dialog is displayed */
    getActivity().getWindow().addFlags(LayoutParams.FLAG_TURN_SCREEN_ON | LayoutParams.FLAG_DISMISS_KEYGUARD);

    /**
     * Code to retreive values
     */
    String name = getArguments().getString("nameText");
    String place = getArguments().getString("placeText");

    /** Creating a alert dialog builder */
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

    /** Setting title for the alert dialog */
    builder.setTitle("alert");

    /** Setting the content for the alert dialog */
    builder.setMessage("alerting Name:"+name+"  Place:"+place);

    /** Defining an OK button event listener */
    builder.setPositiveButton("alert", new OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            /** Exit application on click OK */
            getActivity().finish();
        }
    });

    /** Creating the alert dialog window */
    return builder.create();
}

}

结果

在文本框中输入文本并点击按钮

文本从 MainActivity 传输到 Alert