OnClickListener for a custom ListView

Question

This is my first android project so please help I am trying to create an on click listener for my listview. I will have multiple listview so i cannot name my listview as android:id="@id/android:list". Well i can display data but i am not able to implement an onClickListener Method. I dont want to click on the textview or any button in the list view i want to click the whole list view while passing the value to the new activity

This is the main activity that starts when the applicaton is launched.

public class Db extends Activity {
private SQLiteDatabase newDb;
DataBaseHelper myDbHelper = new DataBaseHelper(this);
public ListAdapter adapter;
private ArrayList<String> results = new ArrayList<String>();


public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

setContentView(R.layout.main);
    openDatabase();
    newDb = myDbHelper.getReadableDatabase();   
    Cursor c = newDb.rawQuery("SELECT _id, organisation, address, postcode FROM shoplist", null);
    int i_organisation = c.getColumnIndex("organisation");
    int i_id = c.getColumnIndex("_id");
    int i_address = c.getColumnIndex("address");
    int i_postcode = c.getColumnIndex("postcode");

    //int count = c.getCount();
    //String data[] = new String[count];
    //int i= 0;
    for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext())
    {
        String i1 = c.getString(c.getColumnIndex("_id"));
        String i2 = c.getString(c.getColumnIndex("organisation"));
        String i3 = c.getString(c.getColumnIndex("address"));
        results.add(i1);

        //i++;
    }
    customAdapter adapter = new customAdapter(getApplicationContext(),
            R.layout.main, results, results, results);
    setListAdapter(adapter);





}

private long inserttodata() {
    // TODO Auto-generated method stub
    ContentValues cv = new ContentValues();
    cv.put("id", "112");
    cv.put("organisation","test" );
     return newDb.insert("shoplist", null, cv);
}

private void openDatabase() {

    try {

        myDbHelper.createDataBase();

    } catch (IOException ioe) {

        throw new Error("Unable to create database");

    }

    try {

        myDbHelper.openDataBase();


    } catch (SQLException sqle) {
System.out.println("failed to open");
        throw sqle;

    }
    //String[] columns= new String[]{"_id", "Organisation"};
    //cursor = newDb.query("Shop", columns, null, null, null, null, null);

}

}

My database helper class

public class DataBaseHelper extends SQLiteOpenHelper{

//The Android's default system path of your application database.
private static String DB_PATH = "/data/data/calc.three/databases/";

private static String DB_NAME = "charity.db";

private SQLiteDatabase myDataBase; 

private final Context myContext;


public DataBaseHelper(Context context) {

    super(context, DB_NAME, null, 1);
    this.myContext = context;
}   


public void createDataBase() throws IOException{

    boolean dbExist = checkDataBase();

    if(dbExist){
        //do nothing - database already exist
    }else{

        //By calling this method and empty database will be created into the default system path
           //of your application so we are gonna be able to overwrite that database with our database.
        this.getReadableDatabase();

        try {

            copyDataBase();

        } catch (IOException e) {

            throw new Error("Error copying database");

        }
    }

}

/**
 * Check if the database already exist to avoid re-copying the file each time you open the application.
 * @return true if it exists, false if it doesn't
 */
private boolean checkDataBase(){

    SQLiteDatabase checkDB = null;

    try{
        String myPath = DB_PATH + DB_NAME;
        checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);

    }catch(SQLiteException e){

        //database does't exist yet.

    }

    if(checkDB != null){

        checkDB.close();

    }

    return checkDB != null ? true : false;
}

/**
 * Copies your database from your local assets-folder to the just created empty database in the
 * system folder, from where it can be accessed and handled.
 * This is done by transfering bytestream.
 * */
private void copyDataBase() throws IOException{

    //Open your local db as the input stream
    InputStream myInput = myContext.getAssets().open(DB_NAME);

    // Path to the just created empty db
    String outFileName = DB_PATH + DB_NAME;

    //Open the empty db as the output stream
    OutputStream myOutput = new FileOutputStream(outFileName);

    //transfer bytes from the inputfile to the outputfile
    byte[] buffer = new byte[2048];
    int length;
    while ((length = myInput.read(buffer))>0){
        myOutput.write(buffer, 0, length);
    }

    //Close the streams
    myOutput.flush();
    myOutput.close();
    myInput.close();

}

public void openDataBase() throws SQLException{

    //Open the database
    String myPath = DB_PATH + DB_NAME;
    SQLiteDatabase.CursorFactory c = null;
    myDataBase = SQLiteDatabase.openDatabase(myPath, c , SQLiteDatabase.OPEN_READWRITE);

}

@Override
public synchronized void close() {

        if(myDataBase != null)
            myDataBase.close();

        super.close();

}

@Override
public void onCreate(SQLiteDatabase db) {

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

}}

My custom adapter class

 public class customAdapter extends ArrayAdapter<String> {
static List<String> serialNo = new ArrayList<String>();
static List<String> name = new ArrayList<String>();  
static List<String> address = new ArrayList<String>();

Context myContext;

public customAdapter(Context context, int resource, List<String> c_serialNo,
    List<String> c_name, List<String> c_address) {

super(context, resource, c_serialNo);

myContext = context;
serialNo = c_serialNo;
name = c_name;
address = c_address;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
    LayoutInflater vi = (LayoutInflater) myContext
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    v = vi.inflate(R.layout.custom_list, null);
}

TextView tv_serialNo = (TextView) v.findViewById(R.id.serialNo);
TextView tv_name = (TextView) v.findViewById(R.id.name);
TextView tv_address = (TextView) v.findViewById(R.id.address);

if (tv_serialNo != null) {
    tv_serialNo.setText(serialNo.get(position));
}
if (tv_name != null) {
    tv_name.setText(name.get(position));
}
if (tv_address!= null) {
    tv_address.setText(address.get(position));
}

return v; }}

The main.xml file

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

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


</LinearLayout>

The custom_list.xml

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



        <RelativeLayout android:layout_width="fill_parent" android:layout_height="80dp" >
            <TextView android:id="@+id/serialNo"
                android:layout_height="38dp"
                android:layout_width="40dp"
                android:padding="1dip"
                android:gravity="top"                    
                android:text="sn"
                                    />
            <TextView android:id="@+id/name"
                android:layout_height="38dp"
                android:layout_width="240dp"
                android:padding="1dip"
                android:gravity="top"                    
                android:text="name"
                android:layout_toRightOf="@id/serialNo"
                                    />

            <ImageButton
                android:id="@+id/fav"
                android:layout_width="38dp"
                android:layout_height="38dp"
                android:layout_alignParentTop="true"
                android:layout_toRightOf="@+id/name"
                android:src="@drawable/ic_launcher" />
            <TextView android:id="@+id/address"
                android:layout_height="40dp"
                android:layout_width="300dp"
                android:padding="1dip"

                android:text="name"
                android:layout_below="@id/serialNo"
                                    />

            <ImageView
                android:id="@+id/source"
                android:layout_width="40dp"
                android:layout_height="40dp"
                android:layout_alignBottom="@+id/address"
                android:layout_toRightOf="@+id/address"
                android:src="@drawable/pg" />

        </RelativeLayout>


</LinearLayout> 

Answer 1

您应该对列表项使用OnItemClickListener ，将其应用于ListView，而不是尝试将OnClickListener应用于单元格本身。

theListView.setOnItemClickListener(new ListView.OnItemClickListener(...){...});