Android 如何从sqlite字段筛选listview?
我想让筛选我的listview的工具依赖于我的数据库。我可以从字符串[]数组中筛选数据,但当我在数据库中的记录上尝试此操作时。我发现此错误Android 如何从sqlite字段筛选listview?,android,arrays,sqlite,listview,filtering,Android,Arrays,Sqlite,Listview,Filtering,我想让筛选我的listview的工具依赖于我的数据库。我可以从字符串[]数组中筛选数据,但当我在数据库中的记录上尝试此操作时。我发现此错误适配器无法解析为变量 在这一行 adapter = new ArrayAdapter<product>(ViewData.this, R.layout.item_list, R.id.edtnama, brand); 这是一个完整的代码 public void onCreate(Bundle savedInstanceState) { s
适配器无法解析为变量
在这一行
adapter = new ArrayAdapter<product>(ViewData.this, R.layout.item_list, R.id.edtnama, brand);
这是一个完整的代码
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.viewdata);
dataSource = new DBDataSource(this);
dataSource.open();
brand = dataSource.getAllproduct();
adapter = new ArrayAdapter<product>(ViewData.this, R.layout.item_list, R.id.edtnama, brand);
ListView.setAdapter(adapter);
edtsearch = (EditText) findViewById(R.id.edtsearch);
edtsearch.addTextChangedListener(new TextWatcher(){
@Override
public void onTextChanged(CharSequence s, int start, int before, int count){
ViewData.this.adapter.getFilter().filter(s);
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after){}
@Override
public void afterTextChanged(Editable s){}
});
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.viewdata);
dataSource=新的DBDataSource(此);
dataSource.open();
brand=dataSource.getAllproduct();
适配器=新阵列适配器(ViewData.this,R.layout.item_list,R.id.edtnama,品牌);
setAdapter(适配器);
edtsearch=(EditText)findViewById(R.id.edtsearch);
edtsearch.addTextChangedListener(新的TextWatcher(){
@凌驾
public void onTextChanged(字符序列、int start、int before、int count){
ViewData.this.adapter.getFilter().filter;
}
@凌驾
public void beforeTextChanged(字符序列s、int start、int count、int after){}
@凌驾
公共无效后文本更改(可编辑的s){}
});
您使用的是自定义适配器吗?是否将适配器变量设为全局?否,我没有使用自定义适配器ArrayAdapter适配器;像这样,我尝试插入专用ArrayAdapter适配器;我遇到另一个错误“无法从ArrayList转换为ArrayList”
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.viewdata);
dataSource = new DBDataSource(this);
dataSource.open();
brand = dataSource.getAllproduct();
adapter = new ArrayAdapter<product>(ViewData.this, R.layout.item_list, R.id.edtnama, brand);
ListView.setAdapter(adapter);
edtsearch = (EditText) findViewById(R.id.edtsearch);
edtsearch.addTextChangedListener(new TextWatcher(){
@Override
public void onTextChanged(CharSequence s, int start, int before, int count){
ViewData.this.adapter.getFilter().filter(s);
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after){}
@Override
public void afterTextChanged(Editable s){}
});