优化框架中获取 Context 的方式

Author: getActivity

app/src/main/java/com/hjq/toast/demo/MainActivity.java

@@ -153,7 +153,7 @@ public void customGlobalToastStyle(View v) {
     }
 
     public void switchToastStrategy(View v) {
-        Toaster.setStrategy(new ToastStrategy(ToastStrategy.SHOW_STRATEGY_TYPE_QUEUE));
+        Toaster.setStrategy(new ToastStrategy(getApplication(), ToastStrategy.SHOW_STRATEGY_TYPE_QUEUE));
         Toaster.show(R.string.demo_switch_to_toast_queuing_strategy_result);
         findViewById(R.id.tv_main_thrice_show).setVisibility(View.VISIBLE);
     }

library/src/main/java/com/hjq/toast/ActivityToast.java

@@ -14,6 +14,7 @@ public class ActivityToast extends CustomToast {
     private final ToastImpl mToastImpl;
 
     public ActivityToast(Activity activity) {
+        super(activity);
         mToastImpl = new ToastImpl(activity, this);
     }
 

library/src/main/java/com/hjq/toast/CustomToast.java

@@ -1,5 +1,6 @@
 package com.hjq.toast;
 
+import android.content.Context;
 import android.view.View;
 import android.widget.TextView;
 import com.hjq.toast.config.IToast;
@@ -12,6 +13,8 @@
  */
 public abstract class CustomToast implements IToast {
 
+    private final Context mContext;
+
     /** Toast 布局 */
     private View mView;
     /** Toast 消息 View */
@@ -35,6 +38,15 @@ public abstract class CustomToast implements IToast {
     /** 长吐司显示的时长，参考至 NotificationManagerService.LONG_DELAY */
     private int mLongDuration = 3500;
 
+    public CustomToast(Context context) {
+        mContext = context;
+    }
+
+    @Override
+    public Context getContext() {
+        return mContext;
+    }
+
     @Override
     public void setText(int id) {
         if (mView == null) {

library/src/main/java/com/hjq/toast/GlobalToast.java

@@ -14,6 +14,7 @@ public class GlobalToast extends CustomToast {
     private final ToastImpl mToastImpl;
 
     public GlobalToast(Application application) {
+        super(application);
         mToastImpl = new ToastImpl(application, this);
     }
 

library/src/main/java/com/hjq/toast/SystemToast.java

@@ -1,6 +1,7 @@
 package com.hjq.toast;
 
 import android.app.Application;
+import android.content.Context;
 import android.view.View;
 import android.widget.TextView;
 import android.widget.Toast;
@@ -15,11 +16,19 @@
 @SuppressWarnings("deprecation")
 public class SystemToast extends Toast implements IToast {
 
+    private final Application mApplication;
+
     /** 吐司消息 View */
     private TextView mMessageView;
 
     public SystemToast(Application application) {
         super(application);
+        mApplication = application;
+    }
+
+    @Override
+    public Context getContext() {
+        return mApplication;
     }
 
     @Override

library/src/main/java/com/hjq/toast/ToastStrategy.java

@@ -50,7 +50,7 @@ public class ToastStrategy implements IToastStrategy {
     private static final Handler HANDLER = new Handler(Looper.getMainLooper());
 
     /** 应用上下文 */
-    private Application mApplication;
+    private final Application mApplication;
 
     /** Toast 对象 */
     private WeakReference<IToast> mToastReference;
@@ -61,11 +61,12 @@ public class ToastStrategy implements IToastStrategy {
     /** 上一个 Toast 显示的时间 */
     private volatile long mLastShowToastMillis;
 
-    public ToastStrategy() {
-        this(ToastStrategy.SHOW_STRATEGY_TYPE_IMMEDIATELY);
+    public ToastStrategy(Application application) {
+        this(application, ToastStrategy.SHOW_STRATEGY_TYPE_IMMEDIATELY);
     }
 
-    public ToastStrategy(int type) {
+    public ToastStrategy(Application application, int type) {
+        mApplication = application;
         mShowStrategyType = type;
         switch (mShowStrategyType) {
             case SHOW_STRATEGY_TYPE_IMMEDIATELY:
@@ -76,45 +77,42 @@ public ToastStrategy(int type) {
         }
     }
 
-    @Override
-    public void registerStrategy(Application application) {
-        mApplication = application;
-    }
-
     @Override
     public int computeShowDuration(CharSequence text) {
         return text.length() > 20 ? Toast.LENGTH_LONG : Toast.LENGTH_SHORT;
     }
 
     @Override
     public IToast createToast(ToastParams params) {
-        Activity toastActivity = getToastActivity();
+        final Application application = getApplication();
+        final Activity toastActivity = getToastActivity();
+
         IToast toast;
         if ((params.priorityType == ToastParams.PRIORITY_TYPE_DEFAULT ||
             params.priorityType == ToastParams.PRIORITY_TYPE_GLOBAL) &&
             Build.VERSION.SDK_INT >= Build.VERSION_CODES.M &&
-            Settings.canDrawOverlays(mApplication)) {
+            Settings.canDrawOverlays(application)) {
             // 如果有悬浮窗权限，就开启全局的 Toast
-            toast = new GlobalToast(mApplication);
+            toast = new GlobalToast(application);
         } else if (toastActivity != null &&
             (params.priorityType == ToastParams.PRIORITY_TYPE_DEFAULT ||
                 params.priorityType == ToastParams.PRIORITY_TYPE_LOCAL)) {
             // 如果没有悬浮窗权限，就开启一个依附于 Activity 的 Toast
             toast = new ActivityToast(toastActivity);
         } else if (Build.VERSION.SDK_INT == Build.VERSION_CODES.N_MR1) {
             // 处理 Android 7.1 上 Toast 在主线程被阻塞后会导致报错的问题
-            toast = new SafeToast(mApplication);
+            toast = new SafeToast(application);
         } else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q &&
-            !areNotificationsEnabled(mApplication)) {
+            !areNotificationsEnabled(application)) {
             // 处理 Toast 关闭通知栏权限之后无法弹出的问题
             // 通过查看和对比 NotificationManagerService 的源码
             // 发现这个问题已经在 Android 10 版本上面修复了
             // 但是 Toast 只能在前台显示，没有通知栏权限后台 Toast 仍然无法显示
             // 并且 Android 10 刚好禁止了 Hook 通知服务
             // 已经有通知栏权限，不需要 Hook 系统通知服务也能正常显示系统 Toast
-            toast = new NotificationToast(mApplication);
+            toast = new NotificationToast(application);
         } else {
-            toast = new SystemToast(mApplication);
+            toast = new SystemToast(application);
         }
         if (areSupportCustomToastStyle(toast) || !onlyShowSystemToastStyle()) {
             diyToastStyle(toast, params.style);
@@ -182,7 +180,7 @@ protected boolean areSupportCustomToastStyle(IToast toast) {
      * 定制 Toast 的样式
      */
     protected void diyToastStyle(IToast toast, IToastStyle<?> style) {
-        toast.setView(style.createView(mApplication));
+        toast.setView(style.createView(toast.getContext()));
         toast.setGravity(style.getGravity(), style.getXOffset(), style.getYOffset());
         toast.setMargin(style.getHorizontalMargin(), style.getVerticalMargin());
     }
@@ -349,6 +347,13 @@ protected boolean areNotificationsEnabled(Context context) {
         return true;
     }
 
+    /**
+     * 获取 Application 对象
+     */
+    protected Application getApplication() {
+        return mApplication;
+    }
+
     /**
      * 获取显示自定义 Toast 的 Activity 对象
      */

library/src/main/java/com/hjq/toast/Toaster.java

@@ -76,7 +76,7 @@ public static void init(Application application, IToastStrategy strategy, IToast
 
         // 初始化 Toast 策略
         if (strategy == null) {
-            strategy = new ToastStrategy();
+            strategy = new ToastStrategy(application);
         }
         setStrategy(strategy);
 
@@ -289,7 +289,6 @@ public static void setStrategy(IToastStrategy strategy) {
             return;
         }
         sToastStrategy = strategy;
-        sToastStrategy.registerStrategy(sApplication);
     }
 
     public static IToastStrategy getStrategy() {

library/src/main/java/com/hjq/toast/config/IToast.java

@@ -1,5 +1,6 @@
 package com.hjq.toast.config;
 
+import android.content.Context;
 import android.view.View;
 import android.widget.TextView;
 
@@ -12,6 +13,11 @@
 @SuppressWarnings("unused")
 public interface IToast {
 
+    /**
+     * 获取上下文对象
+     */
+    Context getContext();
+
     /**
      * 显示
      */

library/src/main/java/com/hjq/toast/config/IToastStrategy.java

@@ -1,6 +1,5 @@
 package com.hjq.toast.config;
 
-import android.app.Application;
 import com.hjq.toast.ToastParams;
 
 /**
@@ -11,11 +10,6 @@
  */
 public interface IToastStrategy {
 
-    /**
-     * 注册策略
-     */
-    void registerStrategy(Application application);
-
     /**
      * 计算 Toast 显示时长
      */