DemoDetailBaseActivity.java

package cn.androidy.thinking;

import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;

import com.example.android.common.activities.SampleActivityBase;

import java.util.ArrayList;


public abstract class DemoDetailBaseActivity extends SampleActivityBase implements View.OnClickListener {
    protected FloatingActionButton mFloatingActionButton;
    protected ArrayList<Integer> mFloatingActionButtonImageResIdList;
    protected int mCurrentColorIndex = 0;
    protected ActionBar mActionBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(getLayoutId());
        mActionBar = getSupportActionBar();
        mActionBar.setDisplayHomeAsUpEnabled(true);
        initFloatingFloatingActionButton();
    }

    protected abstract int getLayoutId();

    protected abstract int getFloatingActionButtonId();

    protected void initFloatingFloatingActionButton() {
        mFloatingActionButton = (FloatingActionButton) findViewById(getFloatingActionButtonId());
        if (mFloatingActionButton == null) {
            return;
        }
        mFloatingActionButton.setOnClickListener(this);
        mFloatingActionButtonImageResIdList = new ArrayList<Integer>();
        mFloatingActionButtonImageResIdList.add(R.drawable.ic_favorite_border_white_48dp);
        mFloatingActionButtonImageResIdList.add(R.drawable.ic_favorite_white_48dp);
        mFloatingActionButton.setImageResource(mFloatingActionButtonImageResIdList.get(mCurrentColorIndex));
        mCurrentColorIndex = (mCurrentColorIndex + 1) % mFloatingActionButtonImageResIdList.size();
    }

    protected void onFloatingActionButtonClicked() {
        mFloatingActionButton.setImageResource(mFloatingActionButtonImageResIdList.get(mCurrentColorIndex));
        mCurrentColorIndex = (mCurrentColorIndex + 1) % mFloatingActionButtonImageResIdList.size();
    }

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onClick(View v) {
        int id = v.getId();
        if (id == getFloatingActionButtonId()) {
            onFloatingActionButtonClicked();
            return;
        }
    }

}