如何将网址从一个班级转移到另一个活动

Question

In my app urls are getting from the firebase database . I want to send these url to the another activity. how can i pass the url (Uri webpage) to the viewer class.Please tell me how to do it.

Answer 1

Use intent in first activity like this:

Intent intent = new Intent(CurrentActivity.this, NextActivity.class);
intent.putExtra("key", value);
CurrentActivity.this.startActivity(intent);

And retrieve it on the second activity:

@Override
 protected void onCreate(Bundle savedInstanceState) {
 Intent intent = getIntent();
 String value = intent.getStringExtra("key");
}

Answer 2

you can use this SharedPreferences

SharedPreferences sharedPref = getSharedPreferences("key",Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedPref.edit();
    editor.putString("key1","your uri");
    editor.apply();

if you want get value in new ativity

SharedPreferences sharedPref = getSharedPreferences("key",Context.MODE_PRIVATE);
String uri=sharedPref.getString("key1","default value if value is null");

keys values must be same

Answer 3

You can also send String Array via intent from one activity to another.

In sender's activity, you can add URL string array into intent.

Intent intent = new Intent(this, MainActivity.class);
String[] urls = new String[] {
        "https://google.com",
        "https://stackoverflow.com"
};
intent.putExtra("urls", urls);
startActivity(intent);

In MainActivity (Receiver), you can get String array from intent.

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        String[] urls = getIntent().getStringArrayExtra("urls");
    }
}

Hope it will be helpful.