Android example source code file (RatingBar1.java)

This example Android source code file (RatingBar1.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

activity, android, app, application, os, override, ratingbar, ratingbar1, textview, ui, widget

The RatingBar1.java Android example source code

/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.view;

import android.app.Activity;
import android.os.Bundle;
import android.widget.RatingBar;
import android.widget.SeekBar;
import android.widget.TextView;

import com.example.android.apis.R;

/**
 * Demonstrates how to use a rating bar
 */
public class RatingBar1 extends Activity implements RatingBar.OnRatingBarChangeListener {
    RatingBar mSmallRatingBar;
    RatingBar mIndicatorRatingBar;
    TextView mRatingText;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.ratingbar_1);
        
        mRatingText = (TextView) findViewById(R.id.rating);

        // We copy the most recently changed rating on to these indicator-only
        // rating bars
        mIndicatorRatingBar = (RatingBar) findViewById(R.id.indicator_ratingbar);
        mSmallRatingBar = (RatingBar) findViewById(R.id.small_ratingbar);
        
        // The different rating bars in the layout. Assign the listener to us.
        ((RatingBar)findViewById(R.id.ratingbar1)).setOnRatingBarChangeListener(this);
        ((RatingBar)findViewById(R.id.ratingbar2)).setOnRatingBarChangeListener(this);
    }

    public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromTouch) {
        final int numStars = ratingBar.getNumStars();
        mRatingText.setText( 
                getString(R.string.ratingbar_rating) + " " + rating + "/" + numStars);

        // Since this rating bar is updated to reflect any of the other rating
        // bars, we should update it to the current values.
        if (mIndicatorRatingBar.getNumStars() != numStars) {
            mIndicatorRatingBar.setNumStars(numStars);
            mSmallRatingBar.setNumStars(numStars);
        }
        if (mIndicatorRatingBar.getRating() != rating) {
            mIndicatorRatingBar.setRating(rating);
            mSmallRatingBar.setRating(rating);
        }
        final float ratingBarStepSize = ratingBar.getStepSize();
        if (mIndicatorRatingBar.getStepSize() != ratingBarStepSize) {
            mIndicatorRatingBar.setStepSize(ratingBarStepSize);
            mSmallRatingBar.setStepSize(ratingBarStepSize);
        }
    }

}