Float label example (http://bradfrostweb.com/blog/post/float-label-pattern/) for Android.

MainActivity.java

package com.jwo.example.sampleform;

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.*;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LinearLayout layout = new LinearLayout(this);
        layout.setOrientation(LinearLayout.VERTICAL);
        setContentView(layout);

        FormField field = new FormField(this);
        field.setHint("Title");
        layout.addView(field);

        View view = new View(this);
        view.setBackgroundColor(Color.GRAY);
        view.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 2));
        layout.addView(view);

        field = new FormField(this);
        field.setHint("Address");
        layout.addView(field);
    }

    public static class FormField extends LinearLayout implements View.OnFocusChangeListener, TextWatcher {
        EditText mEditText;
        TextView mLabel;

        public FormField(Context context) {
            super(context);
            init();
        }

        private void init() {
            setOrientation(VERTICAL);
            mEditText = new EditText(getContext());
            mEditText.setBackground(null);
            mLabel = new TextView(getContext());
            mLabel.setVisibility(View.INVISIBLE);
            mLabel.setPadding(mEditText.getPaddingLeft(), 0, 0, 0);

            addView(mLabel);
            addView(mEditText);
            mEditText.setOnFocusChangeListener(this);
            mEditText.addTextChangedListener(this);
        }

        public void setHint(String text) {
            mEditText.setHint(text);
            mLabel.setText(text);
        }

        public void setText(String text) {
            mEditText.setText(text);
        }

        @Override
        public void onFocusChange(View v, boolean hasFocus) {
            if (!hasFocus) {
                mLabel.setTextColor(Color.GRAY);
            } else {
                mLabel.setTextColor(Color.BLUE);
            }
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
        }

        @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
        @Override
        public void afterTextChanged(Editable s) {
            if (s.length() > 0 && mLabel.getVisibility() == View.INVISIBLE) {
                mLabel.setVisibility(View.VISIBLE);
                mLabel.setAlpha(0);
                mLabel.setTranslationY(mLabel.getHeight()/2);
                mLabel.animate().alpha(1).translationY(0);
            } else if (s.length() == 0 && mLabel.getVisibility() == View.VISIBLE) {
                mLabel.animate().alpha(0).translationY(mLabel.getHeight()/2).withEndAction(new Runnable() {
                    @Override
                    public void run() {
                        mLabel.setVisibility(View.INVISIBLE);
                    }
                });
            }
        }
    }
}