修复目录结构

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 'Google Inc.:Google APIs:23'
+    buildToolsVersion "23.0.2"
+
+    defaultConfig {
+        applicationId "com.example.arial.downloaddemo"
+        minSdkVersion 15
+        targetSdkVersion 23
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(include: ['*.jar'], dir: 'libs')
+    testCompile 'junit:junit:4.12'
+    compile 'com.android.support:appcompat-v7:23.+'
+    compile 'com.android.support:design:23.+'
+    compile project(':downloadutil')
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in D:\sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}

app/src/androidTest/java/com/example/arial/downloaddemo/ApplicationTest.java

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+package com.example.arial.downloaddemo;
+
+import android.app.Application;
+import android.test.ApplicationTestCase;
+
+/**
+ * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
+ */
+public class ApplicationTest extends ApplicationTestCase<Application> {
+    public ApplicationTest() {
+        super(Application.class);
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.arial.downloaddemo" >
+    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme" >
+        <activity
+            android:name=".MainActivity"
+            android:label="@string/app_name"
+            android:theme="@style/AppTheme.NoActionBar" >
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/example/arial/downloaddemo/MainActivity.java

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+package com.example.arial.downloaddemo;
+
+import android.os.Bundle;
+import android.os.Environment;
+import android.os.Handler;
+import android.os.Message;
+import android.support.design.widget.FloatingActionButton;
+import android.support.design.widget.Snackbar;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.view.View;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.widget.Button;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.arialyy.downloadutil.DownLoadUtil;
+import com.arialyy.downloadutil.DownloadListener;
+import com.arialyy.downloadutil.Util;
+
+import java.net.HttpURLConnection;
+
+public class MainActivity extends AppCompatActivity {
+    private static final int DOWNLOAD_PRE = 0x01;
+    private static final int DOWNLOAD_STOP = 0x02;
+    private static final int DOWNLOAD_FAILE = 0x03;
+    private static final int DOWNLOAD_CANCEL = 0x04;
+    private static final int DOWNLOAD_RESUME = 0x05;
+    private static final int DOWNLOAD_COMPLETE = 0x06;
+    private ProgressBar mPb;
+    private String mDownloadUrl = "http://static.gaoshouyou.com/d/22/94/822260b849944492caadd2983f9bb624.apk";
+    private DownLoadUtil mUtil;
+    private Button mStart, mStop, mCancel;
+    private TextView mSize;
+
+    private Handler mUpdateHandler = new Handler() {
+        @Override
+        public void handleMessage(Message msg) {
+            super.handleMessage(msg);
+            switch (msg.what) {
+                case DOWNLOAD_PRE:
+                    mSize.setText(Util.formatFileSize((Long) msg.obj));
+                    mStart.setEnabled(false);
+                    break;
+                case DOWNLOAD_FAILE:
+                    Toast.makeText(MainActivity.this, "下载失败", Toast.LENGTH_SHORT).show();
+                    break;
+                case DOWNLOAD_STOP:
+                    Toast.makeText(MainActivity.this, "暂停下载", Toast.LENGTH_SHORT).show();
+                    mStart.setText("恢复");
+                    mStart.setEnabled(true);
+                    break;
+                case DOWNLOAD_CANCEL:
+                    mPb.setProgress(0);
+                    Toast.makeText(MainActivity.this, "取消下载", Toast.LENGTH_SHORT).show();
+                    mStart.setEnabled(true);
+                    mStart.setText("开始");
+                    break;
+                case DOWNLOAD_RESUME:
+                    Toast.makeText(MainActivity.this, "恢复下载，恢复位置 ==> " + Util.formatFileSize((Long) msg.obj), Toast.LENGTH_SHORT).show();
+                    mStart.setEnabled(false);
+                    break;
+                case DOWNLOAD_COMPLETE:
+                    Toast.makeText(MainActivity.this, "下载完成", Toast.LENGTH_SHORT).show();
+                    mStart.setEnabled(true);
+                    mCancel.setEnabled(false);
+                    mStop.setEnabled(false);
+                    break;
+            }
+        }
+    };
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+        init();
+    }
+
+    private void init() {
+        mPb = (ProgressBar) findViewById(R.id.progressBar);
+        mStart = (Button) findViewById(R.id.start);
+        mStop = (Button) findViewById(R.id.stop);
+        mCancel = (Button) findViewById(R.id.cancel);
+        mSize = (TextView) findViewById(R.id.size);
+        mUtil = new DownLoadUtil();
+    }
+
+    public void onClick(View view) {
+        switch (view.getId()) {
+            case R.id.start:
+                start();
+                break;
+            case R.id.stop:
+                stop();
+                break;
+            case R.id.cancel:
+                cancel();
+                break;
+        }
+    }
+
+    private void start() {
+        mUtil.download(this, mDownloadUrl, Environment.getExternalStorageDirectory().getPath() + "/test.apk"
+                , new DownloadListener() {
+                    long fileSize = 1;
+
+                    @Override
+                    public void onPreDownload(HttpURLConnection connection) {
+                        super.onPreDownload(connection);
+                        mPb.setMax(100);
+                        fileSize = connection.getContentLength();
+                        mUpdateHandler.obtainMessage(DOWNLOAD_PRE, fileSize).sendToTarget();
+                    }
+
+                    @Override
+                    public void onProgress(long currentLocation) {
+                        super.onProgress(currentLocation);
+                        mPb.setProgress((int) (currentLocation * 100 / fileSize));
+                    }
+
+                    @Override
+                    public void onStop(long stopLocation) {
+                        super.onStop(stopLocation);
+                        mUpdateHandler.obtainMessage(DOWNLOAD_STOP).sendToTarget();
+                    }
+
+                    @Override
+                    public void onCancel() {
+                        super.onCancel();
+                        mUpdateHandler.obtainMessage(DOWNLOAD_CANCEL).sendToTarget();
+                    }
+
+                    @Override
+                    public void onResume(long resumeLocation) {
+                        super.onResume(resumeLocation);
+                        mUpdateHandler.obtainMessage(DOWNLOAD_RESUME, resumeLocation).sendToTarget();
+                    }
+
+                    @Override
+                    public void onFail() {
+                        super.onFail();
+                        mUpdateHandler.obtainMessage(DOWNLOAD_FAILE).sendToTarget();
+                    }
+
+                    @Override
+                    public void onComplete() {
+                        super.onComplete();
+                        mUpdateHandler.obtainMessage(DOWNLOAD_COMPLETE).sendToTarget();
+                    }
+                });
+    }
+
+    private void stop() {
+        mUtil.stopDownload();
+    }
+
+    private void cancel() {
+        mUtil.cancelDownload();
+    }
+
+}

app/src/main/res/layout/activity_main.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:fitsSystemWindows="true"
+    tools:context="com.example.arial.downloaddemo.MainActivity">
+
+    <android.support.design.widget.AppBarLayout
+        android:layout_height="wrap_content"
+        android:layout_width="match_parent"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <android.support.v7.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            android:background="?attr/colorPrimary"
+            app:popupTheme="@style/AppTheme.PopupOverlay" />
+
+    </android.support.design.widget.AppBarLayout>
+
+    <include layout="@layout/content_main"/>
+
+    <android.support.design.widget.FloatingActionButton
+        android:id="@+id/fab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_margin="@dimen/fab_margin"
+        android:src="@android:drawable/ic_dialog_email" />
+
+</android.support.design.widget.CoordinatorLayout>

app/src/main/res/layout/content_main.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    app:layout_behavior="@string/appbar_scrolling_view_behavior"
+    tools:context="com.example.arial.downloaddemo.MainActivity"
+    tools:showIn="@layout/activity_main">
+
+    <ProgressBar
+        android:id="@+id/progressBar"
+        style="?android:attr/progressBarStyleHorizontal"
+        android:layout_width="wrap_content"
+        android:layout_height="20dp"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentStart="true"
+        android:layout_alignParentTop="true"
+        android:layout_margin="16dp"
+        android:layout_toLeftOf="@+id/size" />
+
+    <TextView
+        android:id="@+id/size"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentRight="true"
+        android:layout_alignTop="@+id/progressBar"
+        android:layout_marginRight="16dp"
+        android:text="ssss"
+        android:textSize="16sp" />
+
+    <LinearLayout
+        android:layout_below="@+id/progressBar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+
+        <Button
+            android:text="开始"
+            android:id="@+id/start"
+            style="?buttonBarButtonStyle"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:onClick="onClick" />
+
+        <Button
+            android:onClick="onClick"
+            android:text="暂停"
+            android:id="@+id/stop"
+            style="?buttonBarButtonStyle"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1" />
+
+        <Button
+            android:onClick="onClick"
+            android:text="取消"
+            android:id="@+id/cancel"
+            style="?buttonBarButtonStyle"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1" />
+    </LinearLayout>
+</RelativeLayout>

app/src/main/res/menu/menu_main.xml

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+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:context="com.example.arial.downloaddemo.MainActivity" >
+    <item android:id="@+id/action_settings"
+        android:title="@string/action_settings"
+        android:orderInCategory="100"
+        app:showAsAction="never" />
+</menu>

app/src/main/res/values-v21/styles.xml

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+<resources>
+            <style name="AppTheme.NoActionBar">
+            <item name="windowActionBar">false</item>
+            <item name="windowNoTitle">true</item>
+            <item name="android:windowDrawsSystemBarBackgrounds">true</item>
+            <item name="android:statusBarColor">@android:color/transparent</item>
+        </style>
+</resources>

app/src/main/res/values-w820dp/dimens.xml

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+<resources>
+    <!-- Example customization of dimensions originally defined in res/values/dimens.xml
+         (such as screen margins) for screens with more than 820dp of available width. This
+         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
+    <dimen name="activity_horizontal_margin">64dp</dimen>
+</resources>

app/src/main/res/values/colors.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>

app/src/main/res/values/dimens.xml

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+<resources>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+    <dimen name="fab_margin">16dp</dimen>
+</resources>

app/src/main/res/values/strings.xml

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+<resources>
+    <string name="app_name">DownloadDemo</string>
+    <string name="action_settings">Settings</string>
+</resources>

app/src/main/res/values/styles.xml

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+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+    <style name="AppTheme.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
+    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
+
+</resources>

app/src/test/java/com/example/arial/downloaddemo/ExampleUnitTest.java

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+package com.example.arial.downloaddemo;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * To work on unit tests, switch the Test Artifact in the Build Variants view.
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() throws Exception {
+        assertEquals(4, 2 + 2);
+    }
+}