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這是我的第一個Android項目，所以請幫助 我想爲我的listview創建一個點擊監聽器。我將有多個listview，所以我不能將我的listview命名爲android：id =「@ id/android：list」。那麼我可以顯示數據，但我不能實現onClickListener方法。我不想單擊文本視圖或列表視圖中的任何按鈕我想單擊整個列表視圖，同時將值傳遞給新活動OnClickListener自定義ListView
這是啓動應用程序時啓動的主要活動。
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);
}
}
我的數據庫輔助類
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) {
}}
我的自定義適配器類
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; }}
main.xml中的文件
<?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>
的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>