Text Rotation in Android

In Android we can rotate text view after API Level 11 .

In android sdk using public void setRotation (float rotation) method
on Textview we can rotate Text.
and here rotation parameter is The degrees of rotation.

Example:
In below example we can see diffrence between normal TextView and rotated TextView.

UI Layout(text_roation.xml)

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/rotationtextview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="androidsurya(RotationText)"
        android:textColor="#00FF00"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/normaltextview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/normaltextview"
        android:layout_alignParentTop="true"
        android:layout_marginTop="18dp"
        android:text="androidsurya(NormalText)"
        android:textColor="#00FF00"
        android:textStyle="bold" />

</RelativeLayout>

Android Activity(TextRoationActivity.java)

package com.androidsurya.textrotation;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.TextView;

public class TextRoationActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.text_roation);
        TextView rotationTextview = (TextView) findViewById(R.id.rotationtextview);
        rotationTextview.setRotation(85);
    }

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

}

Register Activity in AndroidManifest file

<activity
            android:name="com.androidsurya.textrotation.TextRoationActivity"
            android:label="@string/app_name" >

Output Screenshot:




Note : In AndroidManifest file minsdk level should be "11"
    <uses-sdk
        android:minSdkVersion="11" />

How To Get current layout object on Android

In android using getLayoutInflater method in LayoutInflater class we can get current layout object.

Example Code:

 UI Layout (mainlayout.xml)

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@android:color/darker_gray"
    tools:context=".MainActivity" >
  <Button
                android:id="@+id/button"
                style="?android:attr/buttonStyleSmall"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                  />
  </RelativeLayout>

Here if we want to get current layout object use below code.
LayoutInflater inflater = getLayoutInflater();
RelativeLayout root= (RelativeLayout) inflater.inflate(R.layout.mainlayout,null);

And we can access Button  using root object
Button button= (Button) root.findViewById(R.id.record);

How to convert string type ArrayList to string Array

Here the below code is used to convert list of string object(ArrayList with String) to String Array(String[ ])

using toArray( ) method on ArrayList object we can convert arraylist to string[]

ArrayList<String> number_list = new ArrayList<String>();

number_list .add("one");
number_list .add("two");
number_list .add("three");

String[] numberArr = new String[number_list .size()];

numberArr = number_list.toArray(numberArr );

How to open an URL in Browser Programmatically in Android

In Android using "android.content.Intent” (Intent) to open an specify URL in 

Android’s web browser.

Simple Source Code:
Intent browser_intent= new Intent(Intent.ACTION_VIEW, Uri.parse("http://androidsurya.blogspot.in/"));
startActivity(browser_intent);

Custom Toast in Android

Some time a simple text message isn't enough, to display toast.
at that time you can create a customized layout for your toast notification.

To create a custom layout, define a View layout, in XML or in your application code,
and pass the root View object to the setView(View) method.

Example Project:
Create layout for custom layout of Toast(toast_layout.xml) in drawable folder

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/toast_layout_root"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#DAAA"
    android:orientation="horizontal"
    android:padding="8dp" >

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginRight="8dp"
        android:src="@drawable/ic_launcher" />

    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#FFF" />

</LinearLayout>

(UI layout for activity(toast_display.xml)) in drawable folder
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ToastDisplayActivity" >

    <Button
        android:id="@+id/showToast"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="Show Toast" />

</RelativeLayout>

Activity class(ToastDisplayActivity.java)

package com.androidsurya.toastexample;

import android.os.Bundle;
import android.app.Activity;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class ToastDisplayActivity extends Activity {
    Button showToast;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.toast_display);
        showToast = (Button) findViewById(R.id.showToast);
        showToast.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                LayoutInflater inflater = getLayoutInflater();
                View layout = inflater.inflate(R.layout.toast_layout,
                        (ViewGroup) findViewById(R.id.toast_layout_root));
                TextView text = (TextView) layout.findViewById(R.id.text);
                text.setText("This is a custom toast");
                Toast toast = new Toast(getApplicationContext());
                toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
                toast.setDuration(Toast.LENGTH_LONG);
                toast.setView(layout);
                toast.show();
            }
        });
    }

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

}

Register Actvity in AndroidManifest file

 <activity
            android:name="com.androidsurya.toastexample.ToastDisplayActivity"
            android:label="@string/app_name" >

Output Screenshot


 

For more information about Toast: Android Developers Site

Toast in Android

A toast provides simple feedback about an operation in a small popup.

First, instantiate a Toast object with one of the makeText() methods.

This method takes three parameters:

 1)application Context,
 2)text message
 3)duration for the toast.

It returns a properly initialized Toast object.

You can display the toast notification with show(), as shown in the following example:

Context context = getApplicationContext();
CharSequence text = "Hello toast message!";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();

(Or)

Chain process

Toast.makeText(context, text, duration).show();

Positioning your Toast:

A standard toast notification appears near the bottom of the screen, centered horizontally.
You can change this position with the setGravity(int, int, int) method.
This accepts three parameters: a Gravity constant, an x-position offset, and a y-position offset.

For example, if you decide that the toast should appear in the top-left corner.

you can set the gravity like this:
toast.setGravity(Gravity.TOP|Gravity.LEFT, 0, 0);

Example Project:

UI Layout(toast_display.xml)

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ToastDisplayActivity" >

    <Button
        android:id="@+id/showToast"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="Show Toast" />

</RelativeLayout>

Activity class(ToastDisplayActivity.java)

package com.androidsurya.toastexample;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class ToastDisplayActivity extends Activity {
    Button showToast;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.toast_display);
        showToast = (Button) findViewById(R.id.showToast);
        showToast.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                Toast.makeText(getApplicationContext(), "Toast message Display",
                        Toast.LENGTH_LONG).show();
            }
        });
    }

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

}

Register Activity in AndroidManifest file

 <activity
            android:name="com.androidsurya.toastexample.ToastDisplayActivity"
            android:label="@string/app_name" >

Output Screenshot: