Checkbox ischeck oder uncheck android

Question

Ich habe eine Frage bezüglich der ichecked oder unchecked der Checkbox in meinem Listenansicht. Ich weiß, dass die Art und Weise, wie ich meine Checkbox implementiere, sich von anderen unterscheidet.

in 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; 

    } 
} 

In 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> 

ich wirklich weiß nicht, wie meine Checkbox mit dieser Methode zu überprüfen. Da das Kontrollkästchen nicht anhand des Kontrollkästchens in XML erstellt wurde.

Answer 1

Sie verwenden keinen OnClickListener mit einem Kontrollkästchen, sondern einen onCheckedChangeListener.

mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { 

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


     } 
    });