编写例子

nanchen2251 · Mar 16, 2017 · 5e2ff9f · 5e2ff9f
1 parent 29ddbf5
commit 5e2ff9f
Show file tree

Hide file tree

Showing 10 changed files with 445 additions and 39 deletions.
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
@@ -2,6 +2,9 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           package="com.nanchen.compressimage">
 
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"

diff --git a/app/src/main/java/com/nanchen/compressimage/MainActivity.java b/app/src/main/java/com/nanchen/compressimage/MainActivity.java
@@ -1,13 +1,108 @@
 package com.nanchen.compressimage;
 
-import android.support.v7.app.AppCompatActivity;
+import android.content.Intent;
+import android.graphics.BitmapFactory;
+import android.graphics.Color;
 import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.view.View;
+import android.widget.ImageView;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.nanchen.compresshelper.CompressHelper;
+import com.nanchen.compresshelper.FileUtil;
+
+import java.io.File;
+import java.io.IOException;
+import java.text.DecimalFormat;
+import java.util.Random;
+
+public class MainActivity extends AppCompatActivity{
+
+    private ImageView mImageOld;
+    private ImageView mImageNew;
+
+    private static final int PICK_IMAGE_REQUEST = 1;
+    private TextView mTextOld;
+    private TextView mTextNew;
+
+    private File oldFile;
+    private File newFile;
 
-public class MainActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+
+        initInstances();
+
+    }
+
+    private void initInstances() {
+        mImageOld = (ImageView) findViewById(R.id.main_image_old);
+        mImageNew = (ImageView) findViewById(R.id.main_image_new);
+        mTextOld = (TextView) findViewById(R.id.main_text_old);
+        mTextNew = (TextView) findViewById(R.id.main_text_new);
+    }
+
+    public void compress(View view) {
+        newFile = CompressHelper.getDefault(this).compressToFile(oldFile);
+        mImageNew.setImageBitmap(BitmapFactory.decodeFile(newFile.getAbsolutePath()));
+        mTextNew.setText(String.format("Size : %s", getReadableFileSize(newFile.length())));
+    }
+
+    public void takePhoto(View view) {
+        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
+        intent.setType("image/*");
+        startActivityForResult(intent, PICK_IMAGE_REQUEST);
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+        if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK) {
+            if (data == null) {
+                showError("Failed to open picture!");
+                return;
+            }
+            try {
+                oldFile = FileUtil.getTempFile(this, data.getData());
+                mImageOld.setImageBitmap(BitmapFactory.decodeFile(oldFile.getAbsolutePath()));
+                mTextOld.setText(String.format("Size : %s", getReadableFileSize(oldFile.length())));
+                clearImage();
+            } catch (IOException e) {
+                showError("Failed to read picture data!");
+                e.printStackTrace();
+            }
+        }
+    }
+
+    public void showError(String errorMessage) {
+        Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT).show();
+    }
+
+    private int getRandomColor() {
+        Random rand = new Random();
+        return Color.argb(100, rand.nextInt(256), rand.nextInt(256), rand.nextInt(256));
+    }
+
+
+    private void clearImage() {
+        mImageOld.setBackgroundColor(getRandomColor());
+        mImageNew.setImageDrawable(null);
+        mImageNew.setBackgroundColor(getRandomColor());
+        mTextNew.setText("Size : -");
+    }
+
+
+    public String getReadableFileSize(long size) {
+        if (size <= 0) {
+            return "0";
+        }
+        final String[] units = new String[]{"B", "KB", "MB", "GB", "TB"};
+        int digitGroups = (int) (Math.log10(size) / Math.log10(1024));
+        return new DecimalFormat("#,##0.#").format(size / Math.pow(1024, digitGroups)) + " " + units[digitGroups];
     }
 }
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
@@ -1,18 +1,93 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout
+<LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/activity_main"
+    android:orientation="vertical"
     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.nanchen.compressimage.MainActivity">
 
-    <TextView
-        android:layout_width="wrap_content"
+    <RelativeLayout
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="Hello World!"/>
-</RelativeLayout>
+        android:paddingLeft="50dp"
+        android:paddingRight="50dp">
+
+        <Button
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:onClick="takePhoto"
+            android:layout_alignParentLeft="true"
+            android:layout_alignParentStart="true"
+            android:text="@string/take_photo"/>
+
+        <Button
+
+            android:layout_width="wrap_content"
+            android:layout_alignParentRight="true"
+            android:layout_alignParentEnd="true"
+            android:layout_height="wrap_content"
+            android:text="@string/compress"
+            android:onClick="compress"/>
+    </RelativeLayout>
+
+    <LinearLayout
+        android:paddingRight="20dp"
+        android:paddingLeft="20dp"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_marginRight="10dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <ImageView
+                android:layout_width="match_parent"
+                android:layout_height="200dp"
+                android:background="@color/colorPrimary"
+                android:scaleType="centerCrop"
+                android:id="@+id/main_image_old"/>
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="10dp"
+                android:layout_gravity="center_horizontal"
+                android:id="@+id/main_text_old"
+                android:text="10M"/>
+
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_marginLeft="10dp"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <ImageView
+                android:layout_width="match_parent"
+                android:layout_height="200dp"
+                android:background="@color/colorAccent"
+                android:scaleType="centerCrop"
+                android:id="@+id/main_image_new"/>
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="10dp"
+                android:id="@+id/main_text_new"
+                android:layout_gravity="center_horizontal"
+                android:text="10M"/>
+
+        </LinearLayout>
+
+
+    </LinearLayout>
+
+</LinearLayout>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
@@ -1,3 +1,5 @@
 <resources>
     <string name="app_name">CompressImage</string>
+    <string name="take_photo">照片</string>
+    <string name="compress">压缩</string>
 </resources>
diff --git a/build.gradle b/build.gradle
@@ -7,6 +7,10 @@ buildscript {
     dependencies {
         classpath 'com.android.tools.build:gradle:2.2.2'
 
+        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.4'
+        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
+
+
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }

diff --git a/compresshelper/build.gradle b/compresshelper/build.gradle
@@ -1,4 +1,7 @@
 apply plugin: 'com.android.library'
+apply plugin: 'com.github.dcendents.android-maven'
+
+group='com.github.nanchen2251' // 指定group，com.github.<用户名>
 
 android {
     compileSdkVersion 25
@@ -22,10 +25,35 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
+    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-v7:25.1.1'
     testCompile 'junit:junit:4.12'
+    compile 'io.reactivex:rxandroid:1.2.1'
+}
+
+// build a jar with source files
+task sourcesJar(type: Jar) {
+    from android.sourceSets.main.java.srcDirs
+    classifier = 'sources'
+}
+
+task javadoc(type: Javadoc) {
+    failOnError  false
+    source = android.sourceSets.main.java.sourceFiles
+    classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
+    classpath += configurations.compile
+}
+
+// build a jar with javadoc
+task javadocJar(type: Jar, dependsOn: javadoc) {
+    classifier = 'javadoc'
+    from javadoc.destinationDir
+}
+
+artifacts {
+    archives sourcesJar
+    archives javadocJar
 }
diff --git a/compresshelper/src/main/java/com/nanchen/compresshelper/BitmapUtil.java b/compresshelper/src/main/java/com/nanchen/compresshelper/BitmapUtil.java
@@ -9,7 +9,9 @@
 import java.io.IOException;
 
 /**
- * Bitmap压缩相关操作工具类
+ * Bitmap 压缩相关操作工具类
+ *
+ *
  *
  * 原理不明白请查看我博客：http://www.cnblogs.com/liushilin/p/6116759.html
  *