CODEWITHSUNDEEP
androidandroid-fragmentsandroid-preferences
Daniele
Daniele

Reputation: 4343

AndroidRestart Activity from PreferenceFragment

I declared my PreferenceFragment within a SettingsActivity like this

public class ChordsSettings extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    getFragmentManager().beginTransaction()
            .replace(android.R.id.content, new MyPreferenceFragment())
            .commit();
}

public static class MyPreferenceFragment extends PreferenceFragment {
    @Override
    public void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.settings_preferences);
    }
}
}

I did it like this and didn't create a Fragment on top of the MainActivity because I need to be able to use the back button to get from the SettingsActivity to the MainActivity and this seamed like the only way to go to achieve that.

I need to restart my MainActivity once the preferences changed.

I tried sending a Broadcast from the preferenceFragment but sendBroadcast() cannot be used from a static context. Is there any other way I can achieve this?

Upvotes: 1

Views: 568

Answers (1)

UmarZaii
UmarZaii

Reputation: 1351

Your MainActivity should probably look like this. Note that when btnGoToSetting is clicked finish() method is called. This is for closing the currrent Activity.

MainActivity.java

public class MainActivity extends Activity {

    Button btnGoToSetting;

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

        btnGoToSetting = (Button)findViewById(R.id.btnGoToSetting);
        btnGoToSetting.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
                Intent intent = new Intent(MainActivity.this, SettingsActivity.class);
                startActivity(intent);
            }
        });
    }

}

SettingsActivity.java

public class SettingsActivity extends Activity {

    Button btnSavePreferences;

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

        btnSavePreferences = (Button)findViewById(R.id.btnSavePreferences);
        btnSavePreferences.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //Here is where you save all your preferences
                yourSaveFunction();
                finish();
                Intent intent = new Intent(SettingsActivity.this, MainActivity.class);
                startActivity(intent);
            }
        });
    }

    @Override
    public void onBackPressed() {
        finish();
        Intent intent = new Intent(SettingsActivity.this, MainActivity.class);
        startActivity(intent);
    }

}

Note : There is another way to resfresh you data in MainActivity by making your data asynchronous so that everytime the data changes it will be refresh automatically.

Upvotes: 2

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