Recently, I have been watching Android and using Listview to implement the like function
Basic ideas:
Enter the interface –》Get data –》
Show in Listview –》
Save whether each line is clicked through map collection (position,boolean)-。
Use entity classes to save corresponding objects –》
The get/set method is worth changing accordingly –
Click once, add 1 for the corresponding number
Only implementedLike function，Step onandpraiseBasically similar.
The specific implementation is as follows:
Inherited from BaseAdapter
package .test_listview;
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/**
* Created by gz on 2016/11/9.
*/
public class MainActivityAdapter extends BaseAdapter{
// Used to obtain elements on the interface private ViewHolder holder;
private Context context;
//The bean here is an internal class for testing. Save the likes and the number of steps. You can define a class. //Just just get the data directly, need to be improved private List<Bean> praise_step_num = new ArrayList<Bean>();
private LayoutInflater inflater;
//Save the current number of likes List<Map<String,Object>> listItems;
/*
According to position, which row of data is saved, the default is false, and change it to true after clicking
*/
private Map<Integer, Boolean> isExist = new HashMap<Integer, Boolean>();
public MainActivityAdapter(Context context,List<Map<String,Object>> listItems){
= context;
= listItems;
inflater = (context);
("listItem",());
init();
}
private void init() {
/*
Assign values to the corresponding data, all data is stored in listItems
position corresponds to each row of data one by one
*/
for (int i = 0;i<();i++){
(i,false);
Bean b = new Bean();
Integer praise = ((i).get("praise").toString());
(praise);
Integer step = ((i).get("step").toString());
(step);
praise_step_num.add(i,b);
("praise_step",praise_step_num.get(i).getPraise()+"");
}
}
@Override
public int getCount() {
return () ;
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
//Get likes, step on worth final Bean bean = praise_step_num.get(position);
if(convertView == null){
holder = new ViewHolder();
convertView = (.item_praise,null);
holder.img_praise = (ImageView) (.tv_praises_img);
holder.img_step = (ImageView) (.tv_step_img);
= (TextView) (.tv_praises);
= (TextView) (.tv_step);
= (TextView) (.tv_name);
//holder.img_step.setImageResource();
(holder);
}else{
holder = (ViewHolder) ();
}
(()+"");
(()+"");
((position).get("title")+"");
/*
convertView will be reused every time,
The convertView is not assigned, and the data assigned later will be used.
For example: Click the button for the first line of data like, and the corresponding first line of like picture becomes red
When sliding down the page, there will also be a data below to change.
Assign values to each reuse here
*/
if(()!=0){
holder.img_praise.setImageResource();
}else{
holder.img_praise.setImageResource(.good_no);
}
if(()!=0){
holder.img_step.setImageResource();
}else{
holder.img_step.setImageResource(.bad_no);
}
holder.img_praise.setOnClickListener(new imgClick(position,bean));
return convertView;
}
class imgClick implements {
private int position;
private Bean bean;
public imgClick(int position,Bean bean){
= position;
= bean;
}
@Override
public void onClick(final View v) {
("position",position+"");
if(()==0){
if((position) == false){
final Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
(msg);
switch (){
case 1:
ImageView btn = (ImageView) v;
if(() == ()) {
(position, true);
(()+1);
();
(btn);
notifyDataSetChanged();
break;
}
case 2:
(context, "fail", Toast.LENGTH_LONG).show();
break;
}
}
};
new Thread(){
@Override
public void run() {
Message msg = new Message();
=1;
(msg);
}
}.start();
}
}else{
(context, "Clicked", Toast.LENGTH_LONG).show();
}
}
}
private static class ViewHolder{
public ImageView img_praise;
public ImageView getImg_praise() {
return img_praise;
}
public ImageView getImg_step() {
return img_step;
}
public TextView getPraise() {
return praise;
}
public TextView getStep() {
return step;
}
public TextView getTitle() {
return title;
}
private ImageView img_step;
public TextView praise;
private TextView step;
private TextView title;
}
class Bean{
public int getPraise() {
return praise;
}
public void setPraise(int praise) {
= praise;
}
public int getStep() {
return step;
}
public void setStep(int step) {
= step;
}
private int praise;
private int step;
}
}
MainActivity
Assign Listview value, and then bind to Adapter
package .test_listview;
import ;
import ;
import .;
import ;
import ;
import ;
import ;
import ;
import ;
import ;
import ;
import ;
public class MainActivity extends Activity {
private ListView listview;
private String[] title = {"Commercial","Home use","test","Multiple connections","Air Energy","Commercial","Home use","test","Multiple connections","Air Energy"};
private String[] praise = {"3","1","0","0","0","3","1","0","0","0"};
private String[] step = {"3","0","0","0","0","3","0","0","0","0"};
private ArrayList<Map<String,Object>> map = new ArrayList<Map<String, Object>>();
private ListView listView;
@Override
protected void onCreate(Bundle savedInstanceState) {
(savedInstanceState);
setContentView(.activity_main);
listview = (ListView) findViewById();
for(int i=0;i<;i++){
Map<String,Object> item = new HashMap<String,Object>();
("title",title[i]);
("praise",praise[i]);
("step",step[i]);
(item);
}
MainActivityAdapter adapter = new MainActivityAdapter(this,map);
(adapter);
(new () {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(,);
startActivity(intent);
}
});
}
}
Jump interface, for testing
package .test_listview;
import ;
import ;
import ;
import ;
import ;
import ;
public class DetailActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
(savedInstanceState);
setContentView(.detail_info);
}
}
Simple animation effectsImplementation
Just use it directly
package .test_listview;
import ;
import ;
import ;
public class AnimationTools {
public static void scale(View v) {
ScaleAnimation anim = new ScaleAnimation(1.0f, 1.5f, 1.0f, 1.5f,
Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
0.5f);
(300);
(anim);
}
}
interface
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:andro xmlns:tools="/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".test_listview.MainActivity"> <ListView android: android:layout_width="match_parent" android:layout_height="wrap_content"> </ListView> </RelativeLayout>
Listview child
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:andro android: android:layout_width="match_parent" android:layout_height="match_parent" android:background="#ccc" android:orientation="vertical" android:descendantFocusability= "blocksDescendants" > <FrameLayout android:layout_width="fill_parent" android:layout_height="wrap_content" > <ImageView android: android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="top|left" /> <LinearLayout android:layout_margin="10dip" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:background="@drawable/corners" android:layout_weight="1.0" android:orientation="vertical" > <TextView android: android:layout_width="match_parent" android:layout_height="wrap_content" android:textSize="14sp" android:text="Commercial Multi-Online" android:textColor="#000" /> <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <TextView android: android:layout_marginTop="10dip" android:layout_width="match_parent" android:layout_height="wrap_content" android:textSize="12sp" android:text="Time 2016-10-10" android:textColor="#000" android:visibility="visible" /> <TextView android: android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_weight="1" android:textColor="#000" android:textSize="14sp" android:visibility="gone" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" android:gravity="center|right" > <ImageView android: android:layout_width="30dip" android:layout_height="30dip" android:background="@drawable/good_no" android:layout_marginRight="5dip" /> <TextView android: android:layout_width="50dip" android:layout_height="wrap_content" android:textColor="#000" android:text="10" android:textSize="14dip" android:layout_gravity="center" /> <ImageView android: android:layout_width="30dip" android:layout_height="30dip" android:background="@drawable/bad_no" android:layout_marginRight="5dip" /> <TextView android: android:layout_width="50dip" android:layout_height="wrap_content" android:textColor="#000" android:text="10" android:textSize="14dip" android:layout_gravity="center" /> </LinearLayout> </LinearLayout> </FrameLayout> </LinearLayout>
The interface you enter after clicking on item
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:andro android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" android:orientation="vertical" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="111" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="111" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="111" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="111" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="111" /> </LinearLayout>
The code is my understanding of the program. Some places may not be very clear, but I still have to improve them.
This article has helped me a lot, and the animation effect is moved here, haha, it's very good, I've learned it.
Reference article:https:///article/
The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.