Simple Android Full Justification Overview

This is very simple. What you want to do is get the library itself and add it to your Android project. Upcoming

1. Support for auto-hyphenating
2. Support for editable text (while justification is enabled)
3. More optimizations

Been very busy lately

Option 1 (Draw-Based) - Setup

Looks very accurate and neat. Small issues may arise but can be easily sorted out if users post their issues on Github. To use it, all you have to do is include the TextViewEx.java and TextJustifyUtils.java in your project. Then you may use as you would the built-in TextView.

To improve performance on large TextViews, you must enable optimization. To do so, you must use setDrawingCacheEnabled(bool). Uing this increases speed, but it also requires more memory.

<ScrollView 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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >
    
    <com.textjustify.TextViewEx
        android:id="@+id/textview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
        
</ScrollView>

@Override
protected void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main); 
    
    TextViewEx txtViewEx = (TextViewEx) findViewById(R.id.textViewEx);
    txtViewEx.setText("Insert your content here", true); // true: enables justification
}

Option 1 - Result

Comparison

Option 2 (String-Based) - Setup

This would be considered a fallback option in the case the previous option did not work for you. To use this, include TextJustifyUtils.java and follow the sample code below.

@Override
protected void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main); 
    
    final TextView txtView = (TextView) findViewById(R.id.textView);
    txtView.getViewTreeObserver().addOnPreDrawListener(new OnPreDrawListener()
    {           
        boolean isJustified = false;

        @Override
        public boolean onPreDraw() 
        {
            if(!isJustified)
            {
                TextJustifyUtils.run(txtView);
                isJustified = true;
            }
            
            return true;
        }
        
    });
}

Option 2 - Result

Comparison

Notes

HTML formatting will cause you to have expected results.

Contributors

bluejamesbond
fscz
shayanpourvatan