複選框缺血或未選中android

Question

我有一個問題關於在我的列表視圖中的複選框的缺陷或未選中。我意識到，我實現我的複選框的方式與其他方式不同。

在mainactivity.java

package com.example.luenwong.checkboxtest; 

import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.util.SparseBooleanArray; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.CheckBox; 
import android.widget.ListView; 

public class MainActivity extends AppCompatActivity { 

Button bn; 
ListView listView; 
CheckBox chkAll; 
String[] android_versions = { "ID:1", "ID:2", "ID:3", "ID:4", "ID:5", "ID:6", "ID:7", "ID:8", "ID:9" }; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    listView = (ListView) findViewById(R.id.list); 
    chkAll = (CheckBox) findViewById(R.id.chkAll); 
    bn = (Button) findViewById(R.id.buttonStore); 

    final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_multiple_choice, android_versions); 
    listView.setAdapter(adapter); 

    bn.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      int itemCount = listView.getCount(); 
      for(int i = 0; i < itemCount; i++) 
      { 
       if(((CheckBox) view).isChecked()){ 
        System.out.println("hey there"); 
      } 
      } 
     } 
    }); 

    View.OnClickListener clickListener = new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      CheckBox chk = (CheckBox) view; 
      int itemCount = listView.getCount(); 
      for (int i = 0; i < itemCount; i++) { 
       System.out.println("correct: "+adapter.getItem(i)); 
       listView.setItemChecked(i, chk.isChecked()); 
      } 
     } 
    }; 

    AdapterView.OnItemClickListener itemClickListener = new AdapterView.OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { 
      CheckBox chk = (CheckBox) findViewById(R.id.chkAll); 
      int checkedItemCount = getCheckedItemCount(); 
      if (listView.getCount() == checkedItemCount) 
       chk.setChecked(true); 
      else 
       chk.setChecked(false); 
     } 
    }; 

    chkAll.setOnClickListener(clickListener); 
    listView.setOnItemClickListener(itemClickListener); 

} 
    private int getCheckedItemCount(){ 
     int cnt = 0; 
     SparseBooleanArray positions = listView.getCheckedItemPositions(); 
     int itemCount = listView.getCount(); 

     for(int i=0;i<itemCount;i++){ 
      if(positions.get(i)) 
       cnt++; 
     } 

    return cnt; 

    } 
} 

在XML

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" > 

    <LinearLayout 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:orientation="horizontal" 
     android:gravity="right" 
     android:paddingRight="5dp" 
     > 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="selectALL" 
      /> 

     <CheckBox 
      android:id="@+id/chkAll" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:onClick="getGet" 
      /> 

    </LinearLayout> 

    <ListView 
     android:id="@+id/list" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 


      android:choiceMode="multipleChoice" 
      /> 
     <Button 
      android:id="@+id/buttonStore" 
      android:layout_height="wrap_content" 
      android:layout_width="wrap_content" 
      android:text="ADD Checkbox" 
      ></Button> 

     </LinearLayout> 

我真的不知道如何檢查我的複選框，用這種方法。由於複選框不是基於XML中的複選框標籤創建的。

Answer 1

您不使用帶有複選框的OnClickListener，而是使用onCheckedChangeListener。

mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { 

    @Override 
    public void onCheckedChanged(CompoundButton view ,boolean isChecked) { 
     if(view.isChecked) { 
      // Do something 
     } else { 
      // Do something else 
     } 


     } 
    });