Butter Knife

How to install.

step1

dependencies {
        classpath 'com.android.tools.build:gradle:2.1.2'
        classpath 'com.google.gms:google-services:3.0.0'
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }

step2

It is important that you add apply plugin: 'android-apt' to top of the module-level build.gradlefile; most likely below the first line like this:

apply plugin: 'com.android.application'
apply plugin: 'android-apt'

step3

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    ....................

    compile 'com.jakewharton:butterknife:8.1.0'
    apt 'com.jakewharton:butterknife-compiler:8.1.0'

    ....................


}

How to use
http://www.w2bc.com/Article/55029

http://blog.ccjeng.com/2015/08/Android-ButterKnife.html


Need unbind!!!

Create a field in your fragment as
Unbinder unbinder;
in onCreateView you call

unbinder = Butterknife.bind(this, root);

and in onDestroyView you need to call

unbinder.unbind();

thats it you're done.

Important!!

ath the below, if ues the Butter Knif at the image button,will have error,why?

error show:
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageButton.setImageResource(int)' on a null object reference

solve:

imb1= (ImageButton) view.findViewById(R.id.imb1);

again in
on llick

package pom2.poly.com.trythemoviedbapi.Fragment;
import android.content.ContentValues;import android.database.Cursor;import android.graphics.Bitmap;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.net.Uri;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v4.app.Fragment;import android.support.v4.app.LoaderManager;import android.support.v4.content.CursorLoader;import android.support.v4.content.Loader;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ScrollView;import android.widget.TextView;
import com.squareup.picasso.Picasso;import com.squareup.picasso.Target;
import butterknife.Bind;import butterknife.ButterKnife;import pom2.poly.com.trythemoviedbapi.R;import pom2.poly.com.trythemoviedbapi.Sqlite.MovieDbContract;import pom2.poly.com.trythemoviedbapi.Utility;
/** * Created by User on 1/2/2016. */public class DetailFragment extends Fragment implements View.OnClickListener, LoaderManager.LoaderCallbacks<Cursor> {
    private static int CURSORLOADER_ID;//    @Bind(R.id.imb1)    ImageButton imb1;    @Bind(R.id.iv1)
    ImageView iv1;    @Bind(R.id.tvTitle)
    TextView tvTitle;    @Bind(R.id.tvRate)
    TextView tvRate;    @Bind(R.id.tvDate)
    TextView tvDate;    @Bind(R.id.tvOverview)
    TextView tvOverview;//    @Bind(R.id.scrollView)    ScrollView scrollView;    @Bind(R.id.lineayout1)
    LinearLayout lineayout1;    private String m_id = null;    private Boolean isTwoPlanMode = false;    private Bundle infBundle = null;
    public Boolean getIsTwoPlanMode() {
        return isTwoPlanMode;    }

    public DetailFragment setIsTwoPlanMode(Boolean isTwoPlanMode) {
        this.isTwoPlanMode = isTwoPlanMode;        return this;    }

    @Override    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);        //if do not save before ,infBundle will equal null        if (savedInstanceState != null) {
            infBundle = (Bundle) savedInstanceState.get(Utility.BUNDLE_KEY_RESTORE_DETAIL_BUNDLE);        }

    }

    @Override    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);        outState.putParcelable(Utility.BUNDLE_KEY_RESTORE_DETAIL_BUNDLE, infBundle);    }

    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_detail, container, false);        Log.i("DetailFragment","onCreateView");        ButterKnife.bind(this, view);        imb1= (ImageButton) view.findViewById(R.id.imb1);
        //        Movie aMovie = getIntent().getParcelableExtra(DetailActivity.class.getName());

        //if can't get infBundle from savedInstanceState        if (infBundle == null) {
            if (isTwoPlanMode) {
                infBundle = getArguments();            } else {
                infBundle = getActivity().getIntent().getExtras();            }

        }

        tvTitle.setText(infBundle.getString(Utility.BUNDLE_KEY_TITLE));
        Target target = new Target() {
            @Override            public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom loadedFrom) {
                BitmapDrawable backdround = new BitmapDrawable(getResources(), bitmap);                backdround.setAlpha(150);                lineayout1.setBackgroundDrawable(backdround);            }

            @Override            public void onBitmapFailed(Drawable errorDrawable) {    //當圖片加載失敗時調用            }

            @Override            public void onPrepareLoad(Drawable placeHolderDrawable) {     //當任務被提交時調用            }
        };

        Picasso.with(getContext()).load(infBundle.getString(Utility.BUNDLE_KEY_POSTERPATH)).into(target);        Picasso.with(getContext()).load(infBundle.getString(Utility.BUNDLE_KEY_BACKGROUNDPATH)).into(iv1);
        tvRate.setText(infBundle.getString(Utility.BUNDLE_KEY_RATE));        tvDate.setText(infBundle.getString(Utility.BUNDLE_KEY_DATE));        tvOverview.setText(infBundle.getString(Utility.BUNDLE_KEY_OVERVIEW));
        m_id = infBundle.getString(Utility.BUNDLE_KEY_M_ID);        CURSORLOADER_ID = Integer.parseInt(m_id);        imb1.setOnClickListener(this);
        getActivity().getSupportLoaderManager().initLoader(CURSORLOADER_ID, null, this);

        return view;    }

    @Override    public void onPause() {
        super.onPause();    }

    @Override    public void onDestroyView() {
        super.onDestroyView();        ButterKnife.unbind(this);    }

    @Override    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
        Uri uri = MovieDbContract.FavouriteEntry.buildFavouriteWithID(Long.parseLong(m_id));        return new CursorLoader(getContext(), uri, null, null, null, null);    }

    @Override    public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
        int i = data.getCount();        if (i > 0) {
            //in the favourite table            imb1.setImageResource(R.drawable.ic_star_white_36dp);            imb1.setTag("R.drawable.ic_star_white_36dp");        } else {
            // not in the favourite table            imb1.setImageResource(R.drawable.ic_star_black_36dp);            imb1.setTag("(R.drawable.ic_star_black_36dp");        }

//        data.close();
    }

    @Override    public void onLoaderReset(Loader<Cursor> loader) {

    }

    @Override    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.imb1:
//                Toast.makeText(this,m_id,Toast.LENGTH_SHORT).show();

                if (imb1.getTag().equals("R.drawable.ic_star_white_36dp")) {
                    //the star button is white now
                    //delete the  m_id from the favourite table
                    getContext().getContentResolver().delete(MovieDbContract.FavouriteEntry.buildFavouriteWithID(Long.parseLong(m_id)), null, null);
                    imb1.setImageResource(R.drawable.ic_star_black_36dp);                } else {
                    //the star button is black now                    //insert the m_id to the favourite table                    ContentValues cv = new ContentValues();                    cv.put(MovieDbContract.FavouriteEntry.COLUMN_MOVIE_KEY, Long.parseLong(m_id));                    getContext().getContentResolver().insert(MovieDbContract.FavouriteEntry.CONTENT_URI, cv);
                    imb1.setImageResource(R.drawable.ic_star_white_36dp);                }

                break;        }

    }
}