Android 用Activity实现加载等待界面

转载请标明出处：http://blog.csdn.net/wangtaocsdn/article/details/70990789

实现加载等待界面我用了两种方式，一种是用PopupWindow实现，另一种便是用Activity实现。用PopupWindow实现方法请见我的另一篇博客：

用PopupWindow实现加载等待界面

好了，下面开始。先上效果：

基本原理就是在主界面点击按钮（以登录按钮为例）之后，打开一个新的Activity，此Activity以对话框形式展示。首先，主界面（一个登录按钮以及它的监听事件）：

activity_main.xml

<?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:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:orientation="vertical"    tools:context="com.toprs.waitingpractice.MainActivity">    <Button        android:text="登录"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="loginClick"        android:id="@+id/button2"/></LinearLayout>

MainActivity.java

package com.toprs.waitingpractice;import android.content.Intent;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }    public void loginClick(View v){        Intent intent = new Intent();        intent.setClass(MainActivity.this,WaitingActivity.class);        startActivity(intent);    }}

接下来是弹出的新Activity，新的Activity及其布局：

waiting_activity.xml

<?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:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:orientation="vertical"    tools:context="com.toprs.waitingpractice.MainActivity">    <Button        android:text="登录"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="loginClick"        android:id="@+id/button2"/></LinearLayout>

WaitingActivity.java

package com.tow.waitingpractice;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.widget.Toast;/** * Created by 39867 on 2017/4/18. */public class WaitingActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.loading_activity);        new Handler().postDelayed(new Runnable() {            @Override            public void run() {                WaitingActivity.this.finish();                Toast.makeText(WaitingActivity.this, "登录成功", Toast.LENGTH_SHORT).show();            }        },2000);    }}

OK，运行一下试试吧。