Disable FloatingActionButton

To disable FloatingActionButton, we can call its setEnabled() method. We can also make it invisible or gone by calling its setVisibility() method.


Create a Hello World project of Blank Activity in Android Studio.

Edit layout/content_main.xml to add RadioButtons.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 
 
 
 android_layout_width="match_parent"
 android_layout_height="match_parent"
 android_padding="16dp"
 app_layout_behavior="@string/appbar_scrolling_view_behavior"
 tools_showIn="@layout/activity_main"
 tools_context=".MainActivity"
 android_orientation="vertical">

 <TextView
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_layout_gravity="center_horizontal"
 android_autoLink="web"
 android_text="http://android-er.blogspot.com/"
 android_textStyle="bold" />

 <RadioGroup
 android_id="@+id/groupenable"
 android_layout_width="fill_parent"
 android_layout_height="wrap_content"
 android_orientation="horizontal">
 <RadioButton
 android_id="@+id/fabenable"
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_text="Enable"
 android_checked="true"/>
 <RadioButton
 android_id="@+id/fabdisable"
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_text="Disable"/>
 </RadioGroup>
 <RadioGroup
 android_id="@+id/groupvisibility"
 android_layout_width="fill_parent"
 android_layout_height="wrap_content"
 android_orientation="horizontal">
 <RadioButton
 android_id="@+id/fabvisible"
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_text="Visible"
 android_checked="true"/>
 <RadioButton
 android_id="@+id/fabinvisible"
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_text="Invisible"/>
 <RadioButton
 android_id="@+id/fabgone"
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_text="Gone"/>
 </RadioGroup>
</LinearLayout>

Modify MainActivity.java

package com.blogspot.android_er.androidfloatingactionbutton;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.RadioButton;
import android.widget.RadioGroup;

public class MainActivity extends AppCompatActivity {

 RadioGroup groupEnable, groupVisibility;
 RadioButton btnEnable, btnDisable;
 RadioButton btnVisible, btnInvisible, btnGone;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
 setSupportActionBar(toolbar);

 final FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
 fab.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View view) {
 Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
 .setAction("Action", null).show();
 }
 });

 groupEnable = (RadioGroup)findViewById(R.id.groupenable);
 btnEnable = (RadioButton)findViewById(R.id.fabenable);
 btnDisable = (RadioButton)findViewById(R.id.fabdisable);
 groupVisibility = (RadioGroup)findViewById(R.id.groupvisibility);
 btnVisible = (RadioButton)findViewById(R.id.fabvisible);
 btnInvisible = (RadioButton)findViewById(R.id.fabinvisible);
 btnGone = (RadioButton)findViewById(R.id.fabgone);

 groupEnable.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener(){
 @Override
 public void onCheckedChanged(RadioGroup group, int checkedId) {
 if(btnEnable.isChecked()){
 fab.setEnabled(true);
 }else{
 fab.setEnabled(false);
 }
 }
 });

 groupVisibility.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener(){
 @Override
 public void onCheckedChanged(RadioGroup group, int checkedId) {
 if(btnVisible.isChecked()){
 fab.setVisibility(FloatingActionButton.VISIBLE);
 }else if(btnInvisible.isChecked()){
 fab.setVisibility(FloatingActionButton.INVISIBLE);
 }else{
 fab.setVisibility(FloatingActionButton.GONE);
 }
 }
 });
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
 // Inflate the menu; this adds items to the action bar if it is present.
 getMenuInflater().inflate(R.menu.menu_main, menu);
 return true;
 }

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
 // Handle action bar item clicks here. The action bar will
 // automatically handle clicks on the Home/Up button, so long
 // as you specify a parent activity in AndroidManifest.xml.
 int id = item.getItemId();

 //noinspection SimplifiableIfStatement
 if (id == R.id.action_settings) {
 return true;
 }

 return super.onOptionsItemSelected(item);
 }
}

Read More..

Hello World to open photo using Intent ACTION OPEN DOCUMENT with FloatingActionButton and Snackbar

This example work on last post "Updated Android Studio now provide template of Blank Activity with FloatingActionButton and Snackbar", modify the default Hello World to open image with ACTION_OPEN_DOCUMENT,  display on ImageView.


edit layout/activity_main.xml, to modify the icon of the FloatingActionButton, android:src inside <android.support.design.widget.FloatingActionButton>.

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
 
 
  android_layout_width="match_parent"
 android_layout_height="match_parent" android_fitsSystemWindows="true"
 tools_context=".MainActivity">

 <android.support.design.widget.AppBarLayout android_layout_height="wrap_content"
 android_layout_width="match_parent" android_theme="@style/AppTheme.AppBarOverlay">

 <android.support.v7.widget.Toolbar android_id="@+id/toolbar"
 android_layout_width="match_parent" android_layout_height="?attr/actionBarSize"
 android_background="?attr/colorPrimary" app_popupTheme="@style/AppTheme.PopupOverlay" />

 </android.support.design.widget.AppBarLayout>

 <include layout="@layout/content_main" />

 <android.support.design.widget.FloatingActionButton android_id="@+id/fab"
 android_layout_width="wrap_content" android_layout_height="wrap_content"
 android_layout_gravity="bottom|end" android_layout_margin="@dimen/fab_margin"
 android_src="@android:drawable/ic_menu_gallery" />

</android.support.design.widget.CoordinatorLayout>

layout/content_main.xml, its the main layout of our app.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 
 
 
 android_layout_width="match_parent"
 android_layout_height="match_parent"
 android_padding="16dp"
 android_orientation="vertical"
 app_layout_behavior="@string/appbar_scrolling_view_behavior"
 tools_showIn="@layout/activity_main"
 tools_context=".MainActivity">

 <TextView
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_layout_margin="20dp"
 android_layout_gravity="center_horizontal"
 android_autoLink="web"
 android_text="http://android-er.blogspot.com/"
 android_textStyle="bold"/>

 <ScrollView
 android_layout_width="match_parent"
 android_layout_height="wrap_content">

 <LinearLayout
 android_layout_width="match_parent"
 android_layout_height="wrap_content"
 android_orientation="vertical">

 <TextView
 android_id="@+id/texturi"
 android_layout_width="wrap_content"
 android_layout_height="wrap_content" />
 <ImageView
 android_id="@+id/image"
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_adjustViewBounds="true"/>

 </LinearLayout>
 </ScrollView>
</LinearLayout>

com.blogspot.android_er.androidhello.MainActivity.java

package com.blogspot.android_er.androidhello;

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.TextView;

import java.io.FileNotFoundException;

public class MainActivity extends AppCompatActivity {

 private static final int RQS_OPEN_IMAGE = 1;

 ImageView imageView;
 TextView textUri;

 Bitmap bmOriginal = null;
 Uri targetUri = null;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
 setSupportActionBar(toolbar);

 FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
 fab.setOnClickListener(new OnClickListener() {
 @Override
 public void onClick(View view) {
 Snackbar.make(view, "Open photo", Snackbar.LENGTH_LONG)
 .setAction("OK", snackbarOnClickListener)
 .show();
 }
 });

 textUri = (TextView) findViewById(R.id.texturi);
 imageView = (ImageView) findViewById(R.id.image);
 }

 OnClickListener snackbarOnClickListener = new OnClickListener(){
 @Override
 public void onClick(View v) {

 bmOriginal = null;
 imageView.setImageBitmap(null);

 Intent intent = new Intent();

 if (Build.VERSION.SDK_INT >=
 Build.VERSION_CODES.KITKAT) {
 intent.setAction(Intent.ACTION_OPEN_DOCUMENT);
 } else {
 intent.setAction(Intent.ACTION_GET_CONTENT);
 }

 intent.addCategory(Intent.CATEGORY_OPENABLE);

 // set MIME type for image
 intent.setType("image/*");

 startActivityForResult(intent, RQS_OPEN_IMAGE);

 }
 };

 @TargetApi(Build.VERSION_CODES.KITKAT)
 @Override
 protected void onActivityResult(int requestCode,
 int resultCode, Intent data) {

 if (resultCode == Activity.RESULT_OK) {

 Uri dataUri = data.getData();

 if (requestCode == RQS_OPEN_IMAGE) {
 targetUri = dataUri;
 textUri.setText(dataUri.toString());
 updatImage(dataUri);
 }
 }

 }

 private void updatImage(Uri uri){

 if (uri != null){
 Bitmap bm;
 try {
 bm = BitmapFactory.decodeStream(
 getContentResolver()
 .openInputStream(uri));
 imageView.setImageBitmap(bm);
 bmOriginal = bm;

 } catch (FileNotFoundException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 }
 }

}

Download the files (Android Studio Format) .

Related:
- Using Intent.ACTION_OPEN_DOCUMENT, for KitKat API 19 or higher

Next:
- Apply photo effects using Media Effects APIs

Read More..