Monthly Archives: March 2017

Android基础开发之Fragment的简单使用(动态加载)

1、参照Android基础开发之Fragment的简单使用(静态加载)添加两个Fragment的类及布局文件;
2、在Activity的布局文件中添加两个按钮用来进行Fragment的切换;
3、在Activity的布局文件中添加一个FrameLayout布局用于Fragment的显示;

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<?xml version="1.0" encoding="utf-8"?>
<linearlayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:weightSum="2"
    tools:context="com.yusian.fragment.MainActivity">
 
    <button
        android:id="@+id/btn_frag_a"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="A"></button>
 
    <button
        android:id="@+id/btn_frag_b"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="B"></button>
 
    <framelayout
        android:id="@+id/fl_fragment"
        android:layout_weight="1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
 
    </framelayout>
</linearlayout>

4、Fragment的切换涉及到Fragment的两个类:FragmentManager与FragmentTransaction;[……]

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Android基础开发之Fragment的简单使用(静态加载)

1、创建Fragment的布局文件,如fragment_up.xml;

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<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FF0000">
    <textview
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Fragment"
        android:textColor="#FFFFFF"></textview>
 
</linearlayout>

2、创建Fragment的子类,实现onCreateView()方法;

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package com.yusian.fragment;
 
 
import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
 
/**
 * Created by Sian on 2017/3/18.
 */
 
public class UpFragment extends Fragment {
    @Nullable
    @Override
    // 相当于Activity的setContentView;
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_up, container, false);
    }
}

3、在Activity的布局文件中添加fragment标签[……]

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Java基础之多线程的基本实现

1、实现方式一:继承Thread类,重写run方法

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class Demo{
	public static void main(String [] args){
		SAThread thread1 = new SAThread();
		SAThread thread2 = new SAThrea[......]<p class="read-more"><a href="https://www.yusian.com/blog/java/2017/03/17/140012953.html">继续阅读</a></p>