add singleton GitHubApi and Toast

Author: androidmalin

app/build.gradle

@@ -38,15 +38,14 @@ repositories {
 dependencies {
     debugCompile 'com.squareup.leakcanary:leakcanary-android:1.3.1'
     releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.3.1'
+    compile 'com.android.support:support-annotations:23.1.1'
     compile 'com.jakewharton.scalpel:scalpel:1.1.2'
     compile 'com.android.support:appcompat-v7:23.1.1'
-
     compile 'com.github.orhanobut:logger:1.12'
     compile 'com.jakewharton.rxbinding:rxbinding:0.3.0'
-
     //retrofit+gson+rxjava
     compile 'com.squareup.retrofit:retrofit:2.0.0-beta2'
-    compile "com.squareup.retrofit:converter-gson:2.0.0-beta2"
+    compile 'com.squareup.retrofit:converter-gson:2.0.0-beta2'
     compile 'com.squareup.retrofit:adapter-rxjava:2.0.0-beta2'
     compile 'io.reactivex:rxandroid:1.1.0'
 

app/src/main/java/com/malin/rengwuxianrxjava/activity/MainActivity.java

@@ -1146,7 +1146,7 @@ private void method21() {
         mImageView.setVisibility(View.GONE);
         mResultTextView.setVisibility(View.VISIBLE);
         mResultTextView.setText("");
-        Call call = RetrofitService.getInstance().getUser("androidmalin");
+        Call call = RetrofitService.getInstance().createGitHubApi().getUser("androidmalin");
 
         //asynchronous
         call.enqueue(new Callback<User>() {
@@ -1194,7 +1194,7 @@ private void method22(){
         //TODO:2:观察者
         //TODO:3:订阅,被观察者 被 观察者订阅
 
-        Observable<User> observable = RetrofitService.getInstance().getUserObservable("androidmalin");
+        Observable<User> observable = RetrofitService.getInstance().createGitHubApi().getUserObservable("androidmalin");
         observable
                 .subscribeOn(Schedulers.io())
                 .doOnSubscribe(new Action0() {
@@ -1248,7 +1248,7 @@ private void method23() {
         mResultTextView.setVisibility(View.GONE);
         mImageView.setVisibility(View.GONE);
 
-        mGitHubApi = RetrofitService.getInstance();
+        mGitHubApi = RetrofitService.getInstance().createGitHubApi();
         mResultListView = (ListView) findViewById(R.id.lv_list);
         mAdapter = new ArrayAdapter<String>(MainActivity.this, R.layout.item_log, R.id.item_log, new ArrayList<String>());
         mResultListView.setAdapter(mAdapter);

app/src/main/java/com/malin/rengwuxianrxjava/service/RetrofitService.java

@@ -43,28 +43,38 @@
  */
 public class RetrofitService {
     private static final String API = "https://api.github.com";
+
     protected RetrofitService() {
     }
 
-    private volatile static GitHubApi instance = null;
+    private volatile static RetrofitService instance = null;
 
-    public static GitHubApi getInstance() {
+    public static RetrofitService getInstance() {
         if (instance == null) {
             synchronized (RetrofitService.class) {
                 if (instance == null) {
-                    instance = createGithubApi();
+                    instance = new RetrofitService();
                 }
             }
         }
         return instance;
     }
 
 
-    private static GitHubApi createGithubApi() {
-        Retrofit.Builder builder = new Retrofit.Builder()
-                .baseUrl(API)
-                .addConverterFactory(GsonConverterFactory.create())//Gson Convert
-                .addCallAdapterFactory(RxJavaCallAdapterFactory.create());//RxJava
-        return builder.build().create(GitHubApi.class);
+    private volatile static GitHubApi gitHubApi = null;
+
+    public static GitHubApi createGitHubApi() {
+        if (gitHubApi == null) {
+            synchronized (RetrofitService.class) {
+                if (gitHubApi == null) {
+                    gitHubApi = new Retrofit.Builder()
+                            .baseUrl(API)
+                            .addConverterFactory(GsonConverterFactory.create())
+                            .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
+                            .build().create(GitHubApi.class);
+                }
+            }
+        }
+        return gitHubApi;
     }
 }

app/src/main/java/com/malin/rengwuxianrxjava/utils/ToastUtil.java

@@ -66,9 +66,14 @@ protected ToastUtil() {
 
     public void showToast(Context context, String message) {
         if (mToast == null) {
-            mToast = Toast.makeText(context, message, Toast.LENGTH_SHORT);
-            mToast.show();
-            mFirstTime = System.currentTimeMillis();
+            synchronized (ToastUtil.class) {
+                if (mToast == null) {
+                    mToast = Toast.makeText(context, message, Toast.LENGTH_SHORT);
+                    mToast.show();
+                    mFirstTime = System.currentTimeMillis();
+                }
+            }
+
         } else {
             mSecondTime = System.currentTimeMillis();
             if (message.equals(mOldMessage)) {