First

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.externalNativeBuild

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 25
+    buildToolsVersion "25.0.1"
+    defaultConfig {
+        applicationId "com.larry.demoluban"
+        minSdkVersion 15
+        targetSdkVersion 25
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(include: ['*.jar'], dir: 'libs')
+    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+        exclude group: 'com.android.support', module: 'support-annotations'
+    })
+    compile 'com.android.support:appcompat-v7:25.0.1'
+    testCompile 'junit:junit:4.12'
+    compile project(':luban')
+//    compile 'com.github.AlbertLarry:LuBan:1.0'
+    compile 'com.squareup.picasso:picasso:2.3.2'
+}

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:\coder\as-2.2.3\as-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/larry/demoluban/ExampleInstrumentedTest.java

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+package com.larry.demoluban;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumentation test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() throws Exception {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("com.larry.demoluban", appContext.getPackageName());
+    }
+}

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.larry.demoluban">
+
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.READ_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">
+            <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/larry/demoluban/MainActivity.java

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+package com.larry.demoluban;
+
+import android.content.ContentResolver;
+import android.content.Intent;
+import android.database.Cursor;
+import android.net.Uri;
+import android.provider.MediaStore;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.View;
+import android.widget.ImageView;
+
+import com.larry.luban.Luban;
+import com.larry.luban.OnCompressListener;
+import com.squareup.picasso.Picasso;
+
+import java.io.File;
+
+public class MainActivity extends AppCompatActivity implements View.OnClickListener {
+
+    private static final int OPEN_GALLERY_CODE = 0x001;
+    private ImageView imageView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        imageView = (ImageView) findViewById(R.id.imageView);
+        imageView.setOnClickListener(this);
+    }
+
+    /**
+     * 打开相册
+     */
+    public void openGallery() {
+//        tempFile="a.jpeg";
+        Intent intent = new Intent(Intent.ACTION_PICK);// 打开相册
+        intent.setDataAndType(MediaStore.Images.Media.INTERNAL_CONTENT_URI, "image/*");
+//        intent.putExtra("output", Uri.fromFile(tempFile));
+        startActivityForResult(intent, OPEN_GALLERY_CODE);
+    }
+
+    @Override
+    public void onClick(View v) {
+        openGallery();
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+        Log.i("way","origin size ="+getFileByUri(data.getData()).getUsableSpace());
+        Luban.get(this).load(getFileByUri(data.getData())).putGear(Luban.THIRD_GEAR)
+                .setCompressListener(new OnCompressListener() {
+                    @Override
+                    public void onStart() {
+                    }
+
+                    @Override
+                    public void onSuccess(final File file) {
+                        Log.i("way","origin size ="+file.getUsableSpace());
+                        runOnUiThread(new Runnable() {
+                            @Override
+                            public void run() {
+                                Picasso.with(MainActivity.this).load(file).into(imageView);
+                            }
+                        });
+                    }
+
+                    @Override
+                    public void onError(Throwable e) {
+                        Log.i("way", "error");
+                    }
+                }).launch();
+    }
+
+    /**
+     * 通过Uri返回File文件
+     * 注意：通过相机的是类似content://media/external/images/media/97596
+     * 通过相册选择的：file:///storage/sdcard0/DCIM/Camera/IMG_20150423_161955.jpg
+     * 通过查询获取实际的地址
+     *
+     * @param uri
+     * @return
+     */
+    public File getFileByUri(Uri uri) {
+        String path = null;
+        if ("file".equals(uri.getScheme())) {
+            path = uri.getEncodedPath();
+            if (path != null) {
+                path = Uri.decode(path);
+                ContentResolver cr = getContentResolver();
+                StringBuffer buff = new StringBuffer();
+                buff.append("(").append(MediaStore.Images.ImageColumns.DATA).append("=").append("'" + path + "'").append(")");
+                Cursor cur = cr.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new String[]{MediaStore.Images.ImageColumns._ID, MediaStore.Images.ImageColumns.DATA}, buff.toString(), null, null);
+                int index = 0;
+                int dataIdx = 0;
+                for (cur.moveToFirst(); !cur.isAfterLast(); cur.moveToNext()) {
+                    index = cur.getColumnIndex(MediaStore.Images.ImageColumns._ID);
+                    index = cur.getInt(index);
+                    dataIdx = cur.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
+                    path = cur.getString(dataIdx);
+                }
+                cur.close();
+                if (index == 0) {
+                } else {
+                    Uri u = Uri.parse("content://media/external/images/media/" + index);
+                    System.out.println("temp uri is :" + u);
+                }
+            }
+            if (path != null) {
+                return new File(path);
+            }
+        } else if ("content".equals(uri.getScheme())) {
+            // 4.2.2以后
+            String[] proj = {MediaStore.Images.Media.DATA};
+            Cursor cursor = getContentResolver().query(uri, proj, null, null, null);
+            if (cursor.moveToFirst()) {
+                int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
+                path = cursor.getString(columnIndex);
+            }
+            cursor.close();
+
+            return new File(path);
+        } else {
+            Log.i("way", "Uri Scheme:" + uri.getScheme());
+        }
+        return null;
+    }
+}

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

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+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout 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"
+    tools:context="com.larry.demoluban.MainActivity">
+
+ <ImageView
+     android:layout_width="match_parent"
+     android:id="@+id/imageView"
+     android:src="@mipmap/ic_launcher"
+     android:layout_height="match_parent" />
+</RelativeLayout>

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>