package com.example.butterknife;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.animation.AlphaAnimation;

import android.widget.Button;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.Toast;

import butterknife.ButterKnife;

import butterknife.Bind;

import butterknife.OnClick;

import butterknife.OnItemClick;

import butterknife.OnLongClick;

import java.util.List;

import static android.widget.Toast.LENGTH_SHORT;

public class SimpleActivity extends Activity {

//一个可以实现全局View都调用的方法，需要用集合或者数组来传入View对象

  private static final ButterKnife.Action<View> ALPHA_FADE = new ButterKnife.Action<View>() {

    @Override public void apply(View view, int index) {

      AlphaAnimation alphaAnimation = new AlphaAnimation(0, 1);

      alphaAnimation.setFillBefore(true);

      alphaAnimation.setDuration(500);

      alphaAnimation.setStartOffset(index * 100);

      view.startAnimation(alphaAnimation);

    }

  };

//最基本的注解单个View对象

  @Bind(R.id.title) TextView title;

  @Bind(R.id.subtitle) TextView subtitle;

  @Bind(R.id.hello) Button hello;

  @Bind(R.id.list_of_things) ListView listOfThings;

  @Bind(R.id.footer) TextView footer;

//扩展，可以注解多个View对象

  @Bind({ R.id.title, R.id.subtitle, R.id.hello })

  List<View> headerViews;

  private SimpleAdapter adapter;

//实现VIew的onclick方法，Id用onclick注解以后，后面直接方法名就可以使用，不需要再二次调用sayHello方法

  @OnClick(R.id.hello) void sayHello() {

    Toast.makeText(this, "Hello, views!", LENGTH_SHORT).show();

    ButterKnife.apply(headerViews, ALPHA_FADE);

  }

//同理onclick

  @OnLongClick(R.id.hello) boolean sayGetOffMe() {

    Toast.makeText(this, "Let go of me!", LENGTH_SHORT).show();

    return true;

  }

  @OnItemClick(R.id.list_of_things) void onItemClick(int position) {

    Toast.makeText(this, "You clicked: " + adapter.getItem(position), LENGTH_SHORT).show();

  }

  @Override protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.simple_activity);
    //初始化Butter Knife

    ButterKnife.bind(this);

    // Contrived code to use the bound fields.

    title.setText("Butter Knife");

    subtitle.setText("Field and method binding for Android views.");

    footer.setText("by Jake Wharton");

    hello.setText("Say Hello");

    adapter = new SimpleAdapter(this);

    listOfThings.setAdapter(adapter);

  }

}

package com.example.butterknife;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.TextView;

import butterknife.ButterKnife;

import butterknife.Bind;

public class SimpleAdapter extends BaseAdapter {

  private static final String[] CONTENTS =

      "The quick brown fox jumps over the lazy dog".split(" ");

  private final LayoutInflater inflater;

  public SimpleAdapter(Context context) {

    inflater = LayoutInflater.from(context);

  }

  @Override public int getCount() {

    return CONTENTS.length;

  }

  @Override public String getItem(int position) {

    return CONTENTS[position];

  }

  @Override public long getItemId(int position) {

    return position;

  }

  @Override public View getView(int position, View view, ViewGroup parent) {

    ViewHolder holder;

    if (view != null) {

      holder = (ViewHolder) view.getTag();

    } else {

      view = inflater.inflate(R.layout.simple_list_item, parent, false);

      holder = new ViewHolder(view);

      view.setTag(holder);

    }

    String word = getItem(position);

    holder.word.setText("Word: " + word);

    holder.length.setText("Length: " + word.length());

    holder.position.setText("Position: " + position);

    // Note: don't actually do string concatenation like this in an adapter's getView.

    return view;

  }

  static class ViewHolder {

    @Bind(R.id.word) TextView word;

    @Bind(R.id.length) TextView length;

    @Bind(R.id.position) TextView position;

    ViewHolder(View view) {

      ButterKnife.bind(this, view);

    }

  }

}

package com.example.butterknife;

import android.app.Application;

import butterknife.ButterKnife;

public class SimpleApp extends Application {

  @Override public void onCreate() {

    super.onCreate();

    ButterKnife.setDebug(BuildConfig.DEBUG);

  }

}