自定义控件TitleView

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/title_bg"
android:orientation="horizontal">

<Button
android:id="@+id/bt_back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:background="@drawable/back_bg"
android:text="back"
android:textColor="#fff" />

<TextView
android:id="@+id/tv_text"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="1"
android:gravity="center"
android:text="Title Text"
android:textColor="#fff"
android:textSize="25sp" />

<Button
android:id="@+id/bt_edit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:background="@drawable/edit_bg"
android:text="edit"
android:textColor="#fff" />

</LinearLayout>

package com.example.customtitle.view;

import android.app.Activity;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.Toast;

import com.example.customtitle.R;

/**
* 自定义控件TitleView
* Created by My on 2017/3/2.
*/

public class TitleView extends LinearLayout {

private static final String TAG = "TitleView";

// java代码中new这个对象的时候调用
public TitleView(Context context) {
super(context);
Log.d(TAG, "java代码中new这个对象时调用");
}

// xml中创建这个对象时调用
public TitleView(final Context context, AttributeSet attrs) {
super(context, attrs);
Log.d(TAG, "xml中创建这个对象时调用");
// 将title.xml转换成一个View对象添加给TitleView
View.inflate(context, R.layout.title, this);
Button bt_back = (Button) findViewById(R.id.bt_back);
Button bt_edit = (Button) findViewById(R.id.bt_edit);

bt_back.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// 获取到当前Activity对象然后finish掉
// Returns the context the view is running in
Activity activity = (Activity) getContext();
activity.finish();
}
});

bt_edit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(context, "you click EDIT", Toast.LENGTH_SHORT).show();
}
});

}

// xml中创建这个对象且带样式时调用
public TitleView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
}

package com.example.customtitle;

import android.os.Bundle;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;

/**
* 自定义控件TitleView
* 组合原有控件实现
* 用于替换系统原有ActionBar
*/
public class MainActivity extends AppCompatActivity {

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

ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.hide();
}

}
}