Android 多个 select 项目使用按钮和对话框复选框并在列表视图中显示 selected 项目而不是按钮

Question

我正在尝试使用按钮和对话框复选框执行 Android 多个 select 项目，并在列表视图中显示 selected 项目（如图所示）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接收器：

当前显示在 select 从对话框中选中复选框后，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

            <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

以下代码适合您：

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。

Answer 2

您要求的完整源代码如下：

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

<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..当您签入对话框时，它会自动添加到列表视图中

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