I want to ask you, how to change programmatically the background color of LinearLayout in CardView when the text in TextView equals specify word or is empty. For example field1 getting string "red", the background of LinearLayout gets red. I'm fetching the data from JSON php file.
MainActivity.class
public class MainActivity extends AppCompatActivity {
private String jsonURL = "http://example.com/test.php";
private final int jsoncode = 1;
private RecyclerView recyclerView;
ArrayList<Model> ModelArrayList;
private Adapter adapter;
private static ProgressDialog mProgressDialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = findViewById(R.id.recycler);
fetchJSON();
}
@SuppressLint("StaticFieldLeak")
private void fetchJSON(){
new AsyncTask<Void, Void, String>(){
protected String doInBackground(Void[] params) {
String response="";
HashMap<String, String> map=new HashMap<>();
try {
HttpRequest req = new HttpRequest(jsonURL);
response = req.prepare(HttpRequest.Method.POST).withData(map).sendAndReadString();
} catch (Exception e) {
response=e.getMessage();
}
return response;
}
protected void onPostExecute(String result) {
//do something with response
onTaskCompleted(result,jsoncode);
}
}.execute();
}
public void onTaskCompleted(String response, int serviceCode) {
Log.d("responsejson", response.toString());
switch (serviceCode) {
case jsoncode:
if (isSuccess(response)) {
removeSimpleProgressDialog(); //will remove progress dialog
ModelArrayList = getInfo(response);
adapter = new Adapter(this,ModelArrayList);
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext(), LinearLayoutManager.VERTICAL, false));
}else {
Toast.makeText(MainActivity.this, getErrorCode(response), Toast.LENGTH_SHORT).show();
}
}
}
public ArrayList<Model> getInfo(String response) {
ArrayList<Model> ModelArrayList = new ArrayList<>();
try {
JSONObject jsonObject = new JSONObject(response);
if (jsonObject.getString("status").equals("true")) {
JSONArray dataArray = jsonObject.getJSONArray("data");
for (int i = 0; i < dataArray.length(); i++) {
Model fieldsModel = new Model();
JSONObject dataobj = dataArray.getJSONObject(i);
fieldsModel.setField1(dataobj.getString("field1"));
fieldsModel.setField2(dataobj.getString("field2"));
ModelArrayList.add(fieldsModel);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
return ModelArrayList;
}
public boolean isSuccess(String response) {
try {
JSONObject jsonObject = new JSONObject(response);
if (jsonObject.optString("status").equals("true")) {
return true;
} else {
return false;
}
} catch (JSONException e) {
e.printStackTrace();
}
return false;
}
public String getErrorCode(String response) {
try {
JSONObject jsonObject = new JSONObject(response);
return jsonObject.getString("message");
} catch (JSONException e) {
e.printStackTrace();
}
return "No data";
}
}
Adapter.class
public class Adapter extends RecyclerView.Adapter<Adapter.MyViewHolder> {
private LayoutInflater inflater;
private ArrayList<Model> ModelArrayList;
public Adapter(Context ctx, ArrayList<Model> rogerModelArrayList){
inflater = LayoutInflater.from(ctx);
this.ModelArrayList = rogerModelArrayList;
}
@Override
public Adapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.rv_item, parent, false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(Adapter.MyViewHolder holder, int position) {
holder.field1.setText(ModelArrayList.get(position).getField1());
holder.field2.setText(ModelArrayList.get(position).getField2());
}
@Override
public int getItemCount() {
return ModelArrayList.size();
}
class MyViewHolder extends RecyclerView.ViewHolder{
TextView field1,field2;
public MyViewHolder(View itemView) {
super(itemView);
field1 = (TextView) itemView.findViewById(R.id.field1);
field2 = (TextView) itemView.findViewById(R.id.field2);
}
}
}
Model.class
public class Model {
private String field1, field2;
public String getField1() {
return field1;
}
public void setField1(String field1) {
this.field1 = field1;
}
public String getField2() {
return field2;
}
public void setField2(String field2) {
this.field2 = field2;
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#cd15e6"
tools:context=".MainActivity">
** <android.support.v7.widget.RecyclerView
android:id="@+id/recycler"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:layout_marginTop="15dp"/> **
</LinearLayout>
rv_item.xml Here is the LinearLayout which i want to change the color LL_background
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.CardView
android:id="@+id/card_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
app:cardCornerRadius="5dp">
<LinearLayout
android:id="@+id/LL_background"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="100dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:orientation="vertical">
<TextView
android:id="@+id/field1"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_marginTop="5dp"
android:layout_weight="1"
android:text="ddd"
android:textColor="#000"
android:textStyle="bold" />
<TextView
android:id="@+id/field2"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:text="ddd"
android:textColor="#000"
android:textStyle="bold" />
</LinearLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
Please check my project and share your ideas. Thanks a lot
