how to set string resourse dynamically

Question

I have one edittext and button which passes the editText text to the other activity onClick when it comes to second activity it is receiving the text from main activity.

My question is, I have more than 20 String names in String resource folder, I have to open the particular string which matches the edittext value of main activity. In short, I have to change the textview text which matches string resource String

<resources>
        <string name="app_name">sylb</string>
        <string name="title_activity_display">display</string>
        <string name="large_text">some_large_text</string>
        <string name="ds15mca21">second mca</string>
        <string name="ds15mca11">first mca</string>
        <string name="ds15mba21">second <b>mba</b>></string>
        <string name="ds15aut21">second <i>automobile</i></string>
        <string name="action_settings">Settings</string>
</resources>

display code

public class display extends AppCompatActivity {
        String code;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_display);
            Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
            setSupportActionBar(toolbar);
            Intent intent = getIntent();
            Bundle extras = intent.getExtras();
            code= extras.getString("keyName");
            TextView textView= (TextView) findViewById(R.id.textapp);

            textView.setText("R.string." + "ds" + code);
        }
    }

Answer 1

Use the below code!

getResources().getString(resId)//resId is R.string.STRING_NAME

Answer 2

you can try this

textView.setText(getResources().getIdentifier("R.string." + "ds" + code,"string",getPackageName()));

Answer 3

This will do your job! Just pass correct String that you fixed instead of "app_name" (don't use R.string just the resource name)

Example: If I want to get the value of

 <string name="app_name">ItsCharuHereHiFolks</string>

you need to do this

 final TextView textView = (TextView) findViewById(R.id.your_text_view);
 String string = getString(getResId("app_name", R.string.class));
 textView.setText(string);

and

   public static int getResId(String resName, Class<?> c) {

        try {
            Field idField = c.getDeclaredField(resName);
            return idField.getInt(idField);
        } catch (Exception e) {
            e.printStackTrace();
            return -1;
        }
    }

Answer 4

Its really easy. use this in your class

private String getStringResourceByName(String aString) {
      String packageName = getPackageName();
      int resId = getResources().getIdentifier(aString, "string", packageName);
      return getString(resId);
    }

and simply use this

textView.setText(getStringResourceByName("ds" + code));

Or you can simply use the above class and extract any strings.

Example

• If you want questions_en from below resource

  <string name="questions_en">Questions</string>

Use this

String question=getStringResourceByName("questions_en");

Moreover use integer instead of string in getStringResourceByName method to get interger resourse.

getIdentifier (String name, String defType, String defPackage) do the job!!

Credits.

Answer 5

While @Charu's answer is good and efficient enough to perform generic tasks where id's belong to different resource types, you can still have a better solution if you know the string resource name and your task is only related to Strings.

Step-1

in your calling Activity, use the following code.

Intent intent = new Intent(this, newActivity.class);
intent.putExtra("StringResourceId", R.string.dsAbcXyz); //this step will directly pass the int value of your string resource without any iterations
startActivity(intent);

Step-2

Then in your newActivity, use the following code.

Intent prevIntent = getIntent();
int resId = prevIntent.getIntExtra("StringResourceId");
textView.setText(resId); //you can directly pass the int id to textview to display the relevant text

This approach can work when you are pretty sure about the resourxe name to pass as parameter.

But if you are getting your res name through random sources like Server or Databases, then I suggest you to follow @Charu's solution.

Answer 6

use this

getResources().getIdentifier("ds" + code, "String", getPackageName());