我使用android studio开发（NEWS Android应用程序）我有一个问题，我在应用程序中发布一个简短的主题，我需要让用户在点击TextView（点击这里）时看到完整的主题，但我需要更改每个主题的站点链接。有人可以帮帮我吗？
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.util.Base64;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.Volley;
import com.squareup.picasso.Picasso;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.ByteArrayOutputStream;
import java.util.ArrayList;
public class Home extends AppCompatActivity {
RequestQueue requestQueue;
String url = "https://mobarmejlebanon.000webhostapp.com/show.php";
TextView textView;
ListView listview;
ArrayList<listitme> listitmes = new ArrayList<listitme>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
textView = (TextView) findViewById(R.id.textView);
listview = (ListView) findViewById(R.id.listview);
requestQueue = Volley.newRequestQueue(this);
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, url,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
JSONArray jsonArray = response.getJSONArray("allstudents");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject respons = jsonArray.getJSONObject(i);
String id = respons.getString("id");
String name = respons.getString("name");
String info = respons.getString("info");
String img = respons.getString("img");
listitmes.add(new listitme(id, name, info, img));
listAllItme();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("VOLLEY", "ERROR");
}
}
);
requestQueue.add(jsonObjectRequest);
}
public void listAllItme() {
listAdpter lA = new listAdpter(listitmes);
listview.setAdapter(lA);
}
class listAdpter extends BaseAdapter {
ArrayList<listitme> listA = new ArrayList<listitme>();
public listAdpter(ArrayList<listitme> listA) {
this.listA = listA;
}
@Override
public int getCount() {
return listA.size();
}
@Override
public Object getItem(int position) {
return listA.get(position).id;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater layoutInflater = getLayoutInflater();
View view = layoutInflater.inflate(R.layout.row_item, null);
TextView id = (TextView) view.findViewById(R.id.textView_id);
TextView name = (TextView) view.findViewById(R.id.textView_name);
TextView info = (TextView) view.findViewById(R.id.textView_info);
ImageView img = (ImageView) view.findViewById(R.id.image);
id.setText(listA.get(position).id);
name.setText(listA.get(position).name);
info.setText(listA.get(position).info);
Picasso.with(Home.this).load("https://mobarmejlebanon.000webhostapp.com/images/" + listA.get(position).img).into(img);
return view;
}
}
}
以下是Firebase数据库代码
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
public class Topic2 extends AppCompatActivity {
TextView TopicTitle,Topic;
FirebaseDatabase firebaseDatabase = FirebaseDatabase.getInstance();
DatabaseReference mRootReference = firebaseDatabase.getReference();
DatabaseReference mKidRefernece = firebaseDatabase.getReference("topictwotitle");
DatabaseReference mChildReference = mRootReference.child("topictwomessage");
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_topic2);
TopicTitle = (TextView) findViewById(R.id.twotitle);
Topic = (TextView) findViewById(R.id.twomsg);
TopicTitle.setText("Please Wait");
Topic.setText("Loading");
}
@Override
protected void onStart() {
super.onStart();
mChildReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
String message = dataSnapshot.getValue(String.class);
Topic.setText(message);
mKidRefernece.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
String topictitle = dataSnapshot.getValue(String.class);
TopicTitle.setText(topictitle);
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
}
答案 0 :(得分：1)
我建议你使用CardView和RecyclerView来达到目的。您可以更好地了解它here:
修改
根据有关此问题的新查询;我想你必须赶上这个How to get a text after clicking on the CardView。
快乐编码......
答案 1 :(得分：0)
修改
这是你的样本： 我现在加了假人。
MainActivity.java
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ArrayList<TopicDTO> topics = new ArrayList<>();
for (int i = 0; i < 10; i++) {
topics.add(new TopicDTO("" + i, "Topic " + (i + 1), "Your Topic info goes here", "Your Topic Image goes here", "http://www.google.com"));
}
ListView listTopics = (ListView) findViewById(R.id.listTopics);
listTopics.setAdapter(new TopicsListAdapter(MainActivity.this, topics));
}
}
TopicsListAdapter.java
public class TopicsListAdapter extends BaseAdapter {
private LayoutInflater mInflater;
private ArrayList<TopicDTO> mData;
public TopicsListAdapter(Context context, ArrayList<TopicDTO> data) {
mInflater = LayoutInflater.from(context);
mData = data;
}
@Override
public int getCount() {
return mData.size();
}
@Override
public Object getItem(int position) {
return mData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ChildViewHolder holder;
if (convertView == null) {
holder = new ChildViewHolder();
convertView = mInflater.inflate(R.layout.row_topics, parent,
false);
holder.textTopicTitle = (TextView) convertView
.findViewById(R.id.textTopicTitle);
holder.textTopicInfo = (TextView) convertView
.findViewById(R.id.textTopicInfo);
holder.textTopicLink = (TextView) convertView
.findViewById(R.id.textTopicLink);
convertView.setTag(holder);
} else {
holder = (ChildViewHolder) convertView.getTag();
}
final TopicDTO mItem = mData.get(position);
holder.textTopicTitle.setText(mItem.name);
holder.textTopicInfo.setText(mItem.info);
/*You need to have a more info link per topic*/
holder.textTopicLink.setClickable(true);
holder.textTopicLink.setMovementMethod(LinkMovementMethod.getInstance());
String text = "<a href='" + mItem.moreInfoLink + "'> Click here to see full topic </a>";
holder.textTopicLink.setText(Html.fromHtml(text));
return convertView;
}
class ChildViewHolder {
TextView textTopicTitle, textTopicInfo, textTopicLink;
}
}
row_topics.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal">
<ImageView
android:layout_width="50dp"
android:layout_height="50dp"
android:src="@drawable/ic_launcher" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/textTopicTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/textTopicInfo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp" />
</LinearLayout>
</LinearLayout>
<!--You need to add extra TextView in your row file of listview.
It will work as a link per topic.-->
<TextView
android:id="@+id/textTopicLink"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="right"
android:text="Click here to see full topic" />
</LinearLayout>
仔细阅读每条评论，然后实施。而已。没有比这更好的了。
<强> OLD
您需要为每个主题都有一个textView。您可以使用listview或recyclerview。然后，当用户单击与该主题相关联的textView打开链接时，仅来自listview的数据集。
在您要打开链接的textview上尝试此操作：
info.setClickable(true);
info.setMovementMethod(LinkMovementMethod.getInstance());
String text = "<a href='http://www.google.com'> Google </a>";
info.setText(Html.fromHtml(text));
将“http://www.google.com”替换为您主题的链接。