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
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    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);
    }
}

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
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools" 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, it's the main layout of our app.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    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

Updated Android Studio now provide template of Blank Activity with FloatingActionButton and Snackbar

Related:
- Modify this Hello World to open image using Intent.ACTION_OPEN_DOCUMENT, with FloatingActionButton and Snackbar.
- Disable FloatingActionButton

CoordinatorLayout + FloatingActionButton + Snackbar of Android Design Support Library

This example show how CoordinatorLayout + FloatingActionButton + Snackbar work together - a FloatingActionButton added as a child of CoordinatorLayout, and then pass that CoordinatorLayout to Snackbar.make() call - instead of the snackbar displaying over the floating action button, the FloatingActionButton takes advantage of additional callbacks provided by CoordinatorLayout to automatically move upward as the snackbar animates in and returns to its position when the snackbar animates out on Android 3.0 and higher devices - no extra code required.


layout/activity_main.xml

<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="20dp"
    android:padding="10dp"
    android:id="@+id/coordinatorLayout"
    android:background="#000050"
    tools:context=".MainActivity">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="20dp"
        android:padding="10dp"
        android:background="#005000">

        <TextView
            android:id="@+id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:autoLink="web"
            android:textSize="24dp"
            android:layout_alignParentTop="true"
            android:text="http://android-er.blogspot.com/"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/textView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textStyle="bold"
            android:textSize="30dp"
            android:layout_alignParentBottom="true"
            android:text="Android FloatingActionButton example" />
    </RelativeLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/floatingActionButton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:layout_marginRight="20dp"
        android:src="@mipmap/ic_launcher"
        app:fabSize="normal"
        app:layout_anchor="@id/coordinatorLayout"
        app:layout_anchorGravity="bottom|left|end"/>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/floatingActionButton2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:layout_marginRight="20dp"
        android:src="@mipmap/ic_launcher"
        app:fabSize="mini"
        app:layout_anchor="@id/coordinatorLayout"
        app:layout_anchorGravity="bottom|right|end"/>

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

com.example.eric.androidfloatingactionbutton.MainActivity.java

package com.example.eric.androidfloatingactionbutton;

import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    FloatingActionButton floatingActionButton1, floatingActionButton2;
    CoordinatorLayout coordinatorLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        coordinatorLayout = (CoordinatorLayout)findViewById(R.id.coordinatorLayout);
        floatingActionButton1 =
                (FloatingActionButton)findViewById(R.id.floatingActionButton1);
        floatingActionButton2 =
                (FloatingActionButton)findViewById(R.id.floatingActionButton2);

        floatingActionButton1.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {

                Snackbar snackbar = Snackbar.make(
                        coordinatorLayout,
                        "Snackbar: floatingActionButton1 (normal) clicked",
                        Snackbar.LENGTH_LONG);

                snackbar.setAction("OK", new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Toast.makeText(
                                MainActivity.this,
                                "snackbar OK clicked",
                                Toast.LENGTH_LONG).show();
                    }
                });

                snackbar.show();
            }
        });

        floatingActionButton2.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                Snackbar snackbar = Snackbar.make(
                        coordinatorLayout,
                        "Snackbar: floatingActionButton2 (mini) clicked",
                        Snackbar.LENGTH_LONG);

                snackbar.setAction("OK", new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Toast.makeText(
                                MainActivity.this,
                                "snackbar OK clicked",
                                Toast.LENGTH_LONG).show();
                    }
                });

                snackbar.show();
            }
        });
    }

}

Android Design Support Library is needed, read "How to Add Android Design Support Library to Android Studio Project".

Next:
- Set text and background color of Snackbar

Android FloatingActionButton example

FloatingActionButton are used for a special type of promoted action. They are distinguished by a circled icon floating above the UI and have special motion behaviors related to morphing, launching, and the transferring anchor point.

Floating action buttons come in two sizes: the default and the mini. The size can be controlled with the fabSize attribute.

Example:

<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="20dp"
    android:padding="10dp"
    android:id="@+id/coordinatorLayout"
    android:background="#000050"
    tools:context=".MainActivity">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="20dp"
        android:padding="10dp"
        android:background="#005000">

        <TextView
            android:id="@+id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:autoLink="web"
            android:textSize="24dp"
            android:layout_alignParentTop="true"
            android:text="http://android-er.blogspot.com/"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/textView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textStyle="bold"
            android:textSize="30dp"
            android:layout_alignParentBottom="true"
            android:text="Android FloatingActionButton example" />
    </RelativeLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/floatingActionButton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:layout_marginRight="20dp"
        android:src="@mipmap/ic_launcher"
        app:fabSize="normal"
        app:layout_anchor="@id/coordinatorLayout"
        app:layout_anchorGravity="bottom|left|end"/>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/floatingActionButton2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:layout_marginRight="20dp"
        android:src="@mipmap/ic_launcher"
        app:fabSize="mini"
        app:layout_anchor="@id/coordinatorLayout"
        app:layout_anchorGravity="bottom|right|end"/>

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

package com.example.eric.androidfloatingactionbutton;

import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    FloatingActionButton floatingActionButton1, floatingActionButton2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        floatingActionButton1 =
                (FloatingActionButton)findViewById(R.id.floatingActionButton1);
        floatingActionButton2 =
                (FloatingActionButton)findViewById(R.id.floatingActionButton2);

        floatingActionButton1.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this,
                        "floatingActionButton1 (normal) clicked",
                        Toast.LENGTH_LONG).show();
            }
        });

        floatingActionButton2.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this,
                        "floatingActionButton2 (mini) clicked",
                        Toast.LENGTH_LONG).show();
            }
        });
    }

}

Design Support Library is needed, refer to "Add Android Design Support Library to Android Studio Project".

Next:
- CoordinatorLayout + FloatingActionButton + Snackbar of Android Design Support Library