Tuesday, February 28, 2017

android - Handle multiple view clicks

activity_main.xml

<?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"
    android:id="@+id/coordinator_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#b8cfb2"
    >
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:background="#b8cfb2"
        >
        <Button
            android:id="@+id/btn_red"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="RED"
            />
        <Button
            android:id="@+id/btn_green"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Green"
            />
        <TextView
            android:id="@+id/tv_yellow"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="YELLOW"
            />
        <Button
            android:id="@+id/btn_blue"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Blue"
            />
        <TextView
            android:id="@+id/tv_black"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="BLACK"
            />
    </LinearLayout>
</android.support.design.widget.CoordinatorLayout>
MainActivity.java

package com.cfsuman.me.androidcodesnippets;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.support.design.widget.CoordinatorLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;


public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private Context mContext;
    private Activity mActivity;

    private CoordinatorLayout mCLayout;
    private Button mButtonRed;
    private Button mButtonGreen;
    private Button mButtonBlue;

    private TextView mTextViewYellow;
    private TextView mTextViewBlack;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Get the application context
        mContext = getApplicationContext();
        mActivity = MainActivity.this;

        // Get the widget reference from XML layout
        mCLayout = (CoordinatorLayout) findViewById(R.id.coordinator_layout);
        mButtonRed = (Button) findViewById(R.id.btn_red);
        mButtonGreen = (Button) findViewById(R.id.btn_green);
        mButtonBlue = (Button) findViewById(R.id.btn_blue);
        mTextViewYellow = (TextView) findViewById(R.id.tv_yellow);
        mTextViewBlack = (TextView) findViewById(R.id.tv_black);

        // Set click listener for buttons
        mButtonRed.setOnClickListener(this);
        mButtonGreen.setOnClickListener(this);
        mButtonBlue.setOnClickListener(this);

        // Set click listener for text views
        mTextViewYellow.setOnClickListener(this);
        mTextViewBlack.setOnClickListener(this);
    }

    @Override
    public void onClick(View v){
        if(v.getId() == R.id.btn_red){
            mCLayout.setBackgroundColor(Color.RED);
        }else if(v.getId() == R.id.btn_green){
            mCLayout.setBackgroundColor(Color.GREEN);
        }else if(v.getId() == R.id.btn_green){
            mCLayout.setBackgroundColor(Color.GREEN);
        }else if(v.getId() == R.id.btn_blue){
            mCLayout.setBackgroundColor(Color.BLUE);
        }else if(v.getId() == R.id.tv_yellow){
            mCLayout.setBackgroundColor(Color.YELLOW);
        }else if(v.getId() == R.id.tv_black){
            mCLayout.setBackgroundColor(Color.BLACK);
        }
    }
}