Android seekbar在列表视图中更新文本视图
我已经创建了一个Android seekbar在列表视图中更新文本视图,android,android-listview,android-seekbar,Android,Android Listview,Android Seekbar,我已经创建了一个listView,它在每个项目中都有seekBar和textView。我是否需要根据seekBar移动更新textView。ListView行是根据数据库表中的行数创建的。我如何实现这一点?我的代码如下 活动列表标准.xml <LinearLayout android:layout_width="fill_parent" android:layout_height="35dp"> //Label criteria <TextVi
listView
,它在每个项目中都有seekBar
和textView
。我是否需要根据seekBar
移动更新textView
。ListView
行是根据数据库表中的行数创建的。我如何实现这一点?我的代码如下
活动列表标准.xml
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="35dp">
//Label criteria
<TextView
android:id="@+id/txtViewCriteria"
android:textSize="20sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Criteria : " />
//Label criteria from db
<TextView
android:id="@+id/criteriaName"
android:textSize="20sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:text="Criteria" />
<TextView
android:layout_width="180dp"
android:layout_height="fill_parent" />
</LinearLayout>
//SeekBar layout
<SeekBar
android:id="@+id/sbBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:progress="0"
android:max="5"
android:paddingTop="20dp" />
//TextViews for SeekBarlegend
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="horizontal" >
<TextView
android:id="@+id/tvLabel1"
android:paddingLeft="10dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0" />
<TextView
android:id="@+id/tvLabel3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:paddingRight="10dp"
android:text="5" />
</RelativeLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="35dp">
//Label weightage
<TextView
android:id="@+id/txtViewWeightage"
android:textSize="20sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Weightage: "/>
//Label weightage from db
<TextView
android:id="@+id/criteriaWeightage"
android:textSize="20sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/stuMatric"
android:layout_toRightOf="@+id/textView2"
android:text="Weightage" />
<TextView
android:id="@+id/txtView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0" />
</LinearLayout>
//标签标准
//来自数据库的标签标准
//SeekBar布局
//SeekBarlegend的文本视图
//标签重量
//来自数据库的标签权重
活动显示评估.xml
//Title Layout
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="60dp"
android:orientation="vertical">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="60dp"
android:background="@drawable/orangehome"
android:orientation="horizontal">
<TextView
android:layout_width="110dp"
android:layout_height="fill_parent" />
<TextView
android:layout_width="170dp"
android:text="Evaluate"
android:layout_gravity="center_horizontal"
android:gravity="center"
android:textColor="#FFFFFF"
android:textSize="30sp"
android:layout_height="60dp" />
<TextView
android:layout_width="50dp"
android:layout_height="fill_parent" />
<Button
android:id="@+id/btnLogout"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_gravity="center_vertical"
android:background="@drawable/logout"/>
</LinearLayout>
</LinearLayout>
//Criteria layout
<TextView
android:id="@+id/txtViewSubject"
android:paddingTop="10dp"
android:layout_gravity="center_horizontal"
android:gravity="center"
android:layout_width="300dp"
android:layout_height="60dp"
android:textSize="18sp"
android:textColor="#000000"
android:text="Criteria"/>
//List view for criteria
<ListView
android:id="@+id/criteriaListView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
//标题布局
//标准布局
//标准的列表视图
DisplayAssessmentActivity.java
public class DisplayAssessmentActivity extends Activity {
ListDatabaseHandler listCriteria;
private SimpleCursorAdapter dataAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_assessment);
//Open connection and get instance from database
listCriteria = new ListDatabaseHandler(this);
listCriteria.open();
//Delete all data
listCriteria.deleteAllCriteria();
//Add data
listCriteria.insertSomeCriteria();
//Retrieve data from database and display in list view
displayCriteriaListView();
}
private void displayCriteriaListView() {
Cursor cursor = listCriteria.fetchAllCriteria();
// The desired columns to be bound
String[] columns = new String[] {
ListDatabaseHandler.KEY_CRITERIANAME,
};
// the XML defined views which the data will be bound to
int[] to = new int[] {
R.id.criteriaName,
};
// create the adapter using the cursor pointing to the desired data
//as well as the layout information
dataAdapter = new SimpleCursorAdapter(
this, R.layout.activity_list_criteria,
cursor,
columns,
to,
0);
ListView listView = (ListView) findViewById(R.id.criteriaListView);
// Assign adapter to ListView
listView.setAdapter(dataAdapter);
//Action when click on the item
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> listView, View view,
int position, long id) {
// Get the cursor, positioned to the corresponding row in the result set
Cursor cursor = (Cursor) listView.getItemAtPosition(position);
String criteria = cursor.getString(cursor.getColumnIndexOrThrow("criteria_name"));
String weightage =
cursor.getString(cursor.getColumnIndexOrThrow("criteria_weightage"));
//Toast.makeText(getApplicationContext(),
//subjectName, Toast.LENGTH_SHORT).show();
Intent intentResult = new Intent(getApplicationContext(), ResultActivity.class);
startActivity(intentResult);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_display_assessment, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
公共类显示评估活动扩展活动{
ListDatabaseHandler listCriteria;
私有SimpleCursorAdapter数据适配器;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\u display\u assessment);
//打开连接并从数据库获取实例
listCriteria=新的ListDatabaseHandler(此);
listCriteria.open();
//删除所有数据
listCriteria.deleteAllCriteria();
//添加数据
listCriteria.insertSomeCriteria();
//从数据库检索数据并显示在列表视图中
displayCriteriaListView();
}
私有void displayCriteriaListView(){
Cursor Cursor=listCriteria.fetchAllCriteria();
//要绑定的所需列
字符串[]列=新字符串[]{
ListDatabaseHandler.KEY\u标准名称,
};
//数据将绑定到的XML定义的视图
int[]至=新int[]{
R.id.criteriaName,
};
//使用指向所需数据的光标创建适配器
//以及布局信息
dataAdapter=新的SimpleCorsorAdapter(
此,R.layout.activity\u list\u标准,
光标,
柱,
到
0);
ListView ListView=(ListView)findViewById(R.id.criteriaListView);
//将适配器分配给ListView
setAdapter(dataAdapter);
//单击项目时的操作
setOnItemClickListener(新的AdapterView.OnItemClickListener(){
@凌驾
public void onItemClick(AdapterView列表视图、视图、,
内部位置,长id){
//获取光标,定位到结果集中的对应行
游标游标=(游标)listView.getItemAtPosition(位置);
字符串条件=cursor.getString(cursor.getColumnIndexOrThrow(“条件名称”));
弦重=
cursor.getString(cursor.getColumnIndexOrThrow(“标准权重”);
//Toast.makeText(getApplicationContext(),
//subjectName,Toast.LENGTH_SHORT).show();
Intent intentResult=newintent(getApplicationContext(),ResultActivity.class);
startActivity(intentResult);
}
});
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
//为菜单充气;这会将项目添加到操作栏(如果存在)。
getMenuInflater().充气(R.menu.menu\u display\u assessment,menu);
返回true;
}
@凌驾
公共布尔值onOptionsItemSelected(菜单项项){
//处理操作栏项目单击此处。操作栏将
//自动处理Home/Up按钮上的点击,只要
//在AndroidManifest.xml中指定父活动时。
int id=item.getItemId();
//noinspection SimplifiableIf语句
if(id==R.id.action\u设置){
返回true;
}
返回super.onOptionsItemSelected(项目);
}
}
我应该为活动代码做什么?您的建议对我很有价值。使用BaseAdapter或ArrayAdapter创建自定义列表适配器。 将适配器连接到ListView 在adapter的getView()方法中,获取seekbar的引用,并将侦听器设置为seekbar,如下所示:
final TextView text=convertView.findViewById(R.id.textview);
final SeekBar seekbar=(SeekBar) convertView.findViewById(R.id.seekBar1);
sk.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {
// TODO Auto-generated method stub
text.setText(progress);
}
});