欢迎页的制作

1.欢迎页布局

xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/iv_Welcome"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="fitXY"/>
    <TextView
        android:id="@+id/tv_Welcome"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="跳过"
        android:textColor="@android:color/black"
        android:layout_marginLeft="300dp"
        android:layout_marginTop="20dp"/>

RelativeLayout>

2.WelcomeActivity

package com.example.dllo.telbook;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;


/**
 * Created by dllo on 16/6/14.
 */
public class WelcomeActivity extends Activity {
    private ImageView imageView;
    private TextView textView;
    private CountDownTimer countDownTimer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_welcome);
        imageView = (ImageView) findViewById(R.id.iv_Welcome);
        new BitmapAsyncTask().execute("http://p4.image.hiapk.com/uploads/allimg/150115/7730-150115152A5.jpg");
        textView = (TextView) findViewById(R.id.tv_Welcome);
        textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                countDownTimer.cancel();
                startActivity(new Intent(WelcomeActivity.this, MainActivity.class));
                finish();
            }
        });
        countDownTimer = new CountDownTimer(8000, 1000) {
            @Override
            public void onTick(long millisUntilFinished) {
                textView.setText("跳过:" + millisUntilFinished / 1000 + "S");

            }

            @Override
            public void onFinish() {
                startActivity(new Intent(WelcomeActivity.this, MainActivity.class));
                finish();
            }
        }.start();

    }

    class BitmapAsyncTask extends AsyncTask {
        @Override
        protected Bitmap doInBackground(String... params) {
            String imageUrl = params[0];
            Bitmap bitmap;
            HttpURLConnection connection = null;
            InputStream inputStream = null;

            try {
                URL url = new URL(imageUrl);
                connection = (HttpURLConnection) url.openConnection();
                inputStream = connection.getInputStream();
                bitmap = BitmapFactory.decodeStream(inputStream);
                return bitmap;
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    inputStream.close();
                    connection.disconnect();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return null;
        }

        @Override
        protected void onPostExecute(Bitmap bitmap) {
            super.onPostExecute(bitmap);
            imageView.setImageBitmap(bitmap);
        }
    }

}