Question

我正在尝试使用按钮和对话框复选框进行Android多选项目，并在列表视图中显示所选项目（如图片中所示）而不是按钮（当前显示在按钮中：请参考图片）

我可以在下面的按钮中显示接收器，但我希望在列表视图中显示相同的内容：

当前显示从对话框中选择后复选框，如：

"Receiver1, Receiver2"

我想要：

image of Receiver1 with Receiver1 Name
image of Receiver2 with Receiver2 Name

SendServiceActivity.java

import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.Layout;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;

import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.widget.ImageView;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;

public class SendServiceActivity extends AppCompatActivity implements View.OnClickListener{
protected Button selectReceiversBtn;
    protected CharSequence[] receivers = {
            "Receiver1", "Receiver2", "Receivers3"};
    protected ArrayList<CharSequence> selectedReceivers = new ArrayList<>();

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

        selectReceiversBtn = (Button) findViewById(R.id.select_receivers);
        selectReceiversBtn.setOnClickListener((View.OnClickListener) this);
    }

    @Override
    public void onClick(View view) {
        switch(view.getId()) {
            case R.id.select_receivers:
                showSelectReceiversDialog();
                break;
            default:
                break;
        }
    }   

    protected void onChangeSelectedReceivers() {
        StringBuilder stringBuilder = new StringBuilder();

        for(CharSequence receivers : selectedReceivers)
            stringBuilder.append(receivers + ",");
        selectReceiversBtn.setText(stringBuilder.toString());
    }

    protected void showSelectReceiversDialog() {
        boolean[] checkedReceivers = new boolean[receivers.length];
        int count = receivers.length;

        for(int i = 0; i < count; i++)
            checkedReceivers[i] = selectedReceivers.contains(receivers[i]);

        DialogInterface.OnMultiChoiceClickListener receiversDialogListener = new DialogInterface.OnMultiChoiceClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                if(isChecked)
                    selectedReceivers.add(receivers[which]);
                else
                    selectedReceivers.remove(receivers[which]);

                onChangeSelectedReceivers();
            }
        };

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder
                .setTitle("Select Receivers")
                .setMultiChoiceItems(receivers, checkedReceivers, receiversDialogListener)
                .setCancelable(false)
                .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        dialog.dismiss();
                    }
                });
        AlertDialog dialog = builder.create();
        dialog.show();
    }
}

activity_main.xml中

            <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <TextView
                android:id="@+id/textView1"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:padding="5dip"
                android:text="Select Receivers" />

            <Button
                android:id="@+id/select_receivers"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:padding="5dip"
                android:text="- None Selected -" />


        </LinearLayout>

Answer 1

以下要求的完整源代码：

mainactivity.class

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.text.Layout;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.widget.ImageView;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;

public class MainActivity extends Activity implements View.OnClickListener{
    ArrayAdapter<CharSequence> adapter;
    ListView listView1;
    protected Button selectReceiversBtn;
    protected CharSequence[] receivers = {
            "Receiver1", "Receiver2", "Receivers3"};
    protected ArrayList<CharSequence> selectedReceivers = new ArrayList<>();

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

        listView1=(ListView) findViewById(R.id.listView1);
        selectReceiversBtn = (Button) findViewById(R.id.select_receivers);
        selectReceiversBtn.setOnClickListener((View.OnClickListener) this);


       // String[] your_array = {"a","b","c"}
        adapter = new ArrayAdapter<CharSequence>(this,
                android.R.layout.simple_list_item_multiple_choice, selectedReceivers);
        listView1.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        listView1.setAdapter(adapter);
    }

    @Override
    public void onClick(View view) {
        switch(view.getId()) {
            case R.id.select_receivers:
                showSelectReceiversDialog();
                break;
            default:
                break;
        }
    }   

    protected void onChangeSelectedReceivers() {
        StringBuilder stringBuilder = new StringBuilder();

        for(CharSequence receivers : selectedReceivers)
            stringBuilder.append(receivers + ",");
        adapter.notifyDataSetChanged();
        //selectReceiversBtn.setText(stringBuilder.toString());
    }

    protected void showSelectReceiversDialog() {
        boolean[] checkedReceivers = new boolean[receivers.length];
        int count = receivers.length;

        for(int i = 0; i < count; i++)
            checkedReceivers[i] = selectedReceivers.contains(receivers[i]);

        DialogInterface.OnMultiChoiceClickListener receiversDialogListener = new DialogInterface.OnMultiChoiceClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                if(isChecked)
                    selectedReceivers.add(receivers[which]);
                else
                    selectedReceivers.remove(receivers[which]);

                onChangeSelectedReceivers();
            }
        };

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder
                .setTitle("Select Receivers")
                .setMultiChoiceItems(receivers, checkedReceivers, receiversDialogListener)
                .setCancelable(false)
                .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        dialog.dismiss();

                    }
                });
        AlertDialog dialog = builder.create();
        dialog.show();
    }
}

activity_main.xml中

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:padding="5dip"
        android:text="Select Receivers" />

    <Button
        android:id="@+id/select_receivers"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:padding="5dip"
        android:text="- None Selected -" />

    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </ListView>

</LinearLayout>

复制并粘贴上面的代码..当你签入对话框时，它会自动添加到listview

Answer 2

以下代码适用于您：

String[] your_array = {"a","b","c"}
        adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_multiple_choice, your_array);
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        listView.setAdapter(adapter);

使用上面的代码，您可以在列表视图中选中 - 取消选中。

Android使用按钮和对话框复选多项选项，并在列表视图中显示所选项目而不是按钮

2 个答案: