Android 开发使用Activity实现加载等待界面功能示例

<?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>

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);
 }
}

<?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>

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);
 }
}