How To Edit Textview in Android

How To Edit Textview in Android

In activity_main.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">

    <TextView

        android:id="@+id/textview"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="TextView"

        android:textSize="25sp"

        android:textStyle="bold"

        android:gravity="center" />

</LinearLayout>

In MainActivity.java.

package com.mahesh.androidissimples.textviewtoedit;

import android.content.DialogInterface;

import android.support.v7.app.AlertDialog;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.EditText;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    TextView textview;

    AlertDialog alertDialog;

    EditText editText;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        textview= (TextView) findViewById(R.id.textview);

        alertDialog=new AlertDialog.Builder(this).create();

        editText=new EditText(this);

        alertDialog.setTitle("Edit the text");

        alertDialog.setView(editText);

        alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, "SAVE", new DialogInterface.OnClickListener() {

            @Override

            public void onClick(DialogInterface dialog, int which) {

                textview.setText(editText.getText());

            }

        });

        textview.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                editText.setText(textview.getText());

                alertDialog.show();

            }

        });

    }

}

Output

Android Settings Tutorial using PreferenceFragment

                        Android Settings Tutorial using PreferenceFragment

First add dependencies in build.gradle

compile 'com.android.support:preference-v7:25.3.1'

Create xml directory under res folder under xml folder. create xml folder name is preferences.

<?xml version="1.0" encoding="utf-8"?>

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">

<SwitchPreference

    android:defaultValue="true"

    android:key="updateNotification"

    android:summary="Remind you to update"

    android:title="Update"

    />

    <ListPreference

        android:defaultValue="1"

        android:entries="@array/listArray"

        android:entryValues="@array/listValueforSharedPreference"

        android:key="languageListSetting"

        android:summary="Select any language"

        android:title="Language"

        />

</PreferenceScreen>

Create a new layout file under value folder. array.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string-array name="listArray">

        <item>English</item>

        <item>Hindi</item>

    </string-array>

    <string-array name="listValueforSharedPreference">

        <item>1</item>

        <item>2</item>

    </string-array>

</resources>

Create a new Class and extends with PreferenceFragment and imlements OnSharedPreferenceChangeListener

package com.mahesh.androidissimples.setting;

import android.content.Context;

import android.content.SharedPreferences;

import android.os.Bundle;

import android.preference.PreferenceFragment;

import android.support.annotation.Nullable;

import android.support.v4.app.Fragment;

import android.widget.Toast;

/**

 * A simple {@link Fragment} subclass.

 */

public class SettingFragment extends PreferenceFragment implements SharedPreferences.OnSharedPreferenceChangeListener{

    public static final String KEY_LANGUAGE="languageListSetting";

    public static final String KEY_SETTINGS_MENU="updateNotification";

    @Override

    public void onCreate(@Nullable Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        getPreferenceManager().setSharedPreferencesName("SettingPrf");

        getPreferenceManager().setSharedPreferencesMode(Context.MODE_PRIVATE);

        addPreferencesFromResource(R.xml.preferences);

    }

    @Override

    public void onResume() {

        super.onResume();

        getPreferenceScreen().getSharedPreferences()

                .registerOnSharedPreferenceChangeListener(this);

    }

    @Override

    public void onPause() {

        super.onPause();

        getPreferenceScreen().getSharedPreferences()

                .unregisterOnSharedPreferenceChangeListener(this);

    }

    @Override

    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {

        if (key.equals(KEY_LANGUAGE)){

            Toast.makeText(getActivity(), "Changed Language", Toast.LENGTH_SHORT).show();

        }

        if (key.equals(KEY_SETTINGS_MENU)){

            Toast.makeText(getActivity(), "Changed Settings menu", Toast.LENGTH_SHORT).show();

        }

    }

}

In MainActivity class

package com.mahesh.androidissimples.setting;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        getFragmentManager().beginTransaction().replace(android.R.id.content,new SettingFragment())

                .commit();

    }

}

Output: