1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.internal.os; 18 19 import android.content.Context; 20 import android.os.Handler; 21 import android.os.Looper; 22 import android.os.Message; 23 24 public class HandlerCaller { 25 private static final String TAG = "HandlerCaller"; 26 private static final boolean DEBUG = false; 27 28 public final Context mContext; 29 30 final Looper mMainLooper; 31 final Handler mH; 32 33 final Callback mCallback; 34 35 public static class SomeArgs { 36 SomeArgs next; 37 38 public Object arg1; 39 public Object arg2; 40 public Object arg3; 41 public Object arg4; 42 public int argi1; 43 public int argi2; 44 public int argi3; 45 public int argi4; 46 public int argi5; 47 public int argi6; 48 } 49 50 static final int ARGS_POOL_MAX_SIZE = 10; 51 int mArgsPoolSize; 52 SomeArgs mArgsPool; 53 54 class MyHandler extends Handler { 55 MyHandler(Looper looper) { 56 super(looper); 57 } 58 59 @Override 60 public void handleMessage(Message msg) { 61 mCallback.executeMessage(msg); 62 } 63 } 64 65 public interface Callback { 66 public void executeMessage(Message msg); 67 } 68 69 public HandlerCaller(Context context, Callback callback) { 70 mContext = context; 71 mMainLooper = context.getMainLooper(); 72 mH = new MyHandler(mMainLooper); 73 mCallback = callback; 74 } 75 76 public HandlerCaller(Context context, Looper looper, Callback callback) { 77 mContext = context; 78 mMainLooper = looper; 79 mH = new MyHandler(mMainLooper); 80 mCallback = callback; 81 } 82 83 public SomeArgs obtainArgs() { 84 synchronized (mH) { 85 SomeArgs args = mArgsPool; 86 if (args != null) { 87 mArgsPool = args.next; 88 args.next = null; 89 mArgsPoolSize--; 90 return args; 91 } 92 } 93 return new SomeArgs(); 94 } 95 96 public void recycleArgs(SomeArgs args) { 97 synchronized (mH) { 98 if (mArgsPoolSize < ARGS_POOL_MAX_SIZE) { 99 args.next = mArgsPool; 100 mArgsPool = args; 101 mArgsPoolSize++; 102 } 103 } 104 } 105 106 public void executeOrSendMessage(Message msg) { 107 // If we are calling this from the main thread, then we can call 108 // right through. Otherwise, we need to send the message to the 109 // main thread. 110 if (Looper.myLooper() == mMainLooper) { 111 mCallback.executeMessage(msg); 112 msg.recycle(); 113 return; 114 } 115 116 mH.sendMessage(msg); 117 } 118 119 public boolean hasMessages(int what) { 120 return mH.hasMessages(what); 121 } 122 123 public void removeMessages(int what) { 124 mH.removeMessages(what); 125 } 126 127 public void removeMessages(int what, Object obj) { 128 mH.removeMessages(what, obj); 129 } 130 131 public void sendMessage(Message msg) { 132 mH.sendMessage(msg); 133 } 134 135 public Message obtainMessage(int what) { 136 return mH.obtainMessage(what); 137 } 138 139 public Message obtainMessageBO(int what, boolean arg1, Object arg2) { 140 return mH.obtainMessage(what, arg1 ? 1 : 0, 0, arg2); 141 } 142 143 public Message obtainMessageBOO(int what, boolean arg1, Object arg2, Object arg3) { 144 SomeArgs args = obtainArgs(); 145 args.arg1 = arg2; 146 args.arg2 = arg3; 147 return mH.obtainMessage(what, arg1 ? 1 : 0, 0, args); 148 } 149 150 public Message obtainMessageO(int what, Object arg1) { 151 return mH.obtainMessage(what, 0, 0, arg1); 152 } 153 154 public Message obtainMessageI(int what, int arg1) { 155 return mH.obtainMessage(what, arg1, 0); 156 } 157 158 public Message obtainMessageII(int what, int arg1, int arg2) { 159 return mH.obtainMessage(what, arg1, arg2); 160 } 161 162 public Message obtainMessageIO(int what, int arg1, Object arg2) { 163 return mH.obtainMessage(what, arg1, 0, arg2); 164 } 165 166 public Message obtainMessageIIO(int what, int arg1, int arg2, Object arg3) { 167 return mH.obtainMessage(what, arg1, arg2, arg3); 168 } 169 170 public Message obtainMessageIIOO(int what, int arg1, int arg2, 171 Object arg3, Object arg4) { 172 SomeArgs args = obtainArgs(); 173 args.arg1 = arg3; 174 args.arg2 = arg4; 175 return mH.obtainMessage(what, arg1, arg2, args); 176 } 177 178 public Message obtainMessageIOO(int what, int arg1, Object arg2, Object arg3) { 179 SomeArgs args = obtainArgs(); 180 args.arg1 = arg2; 181 args.arg2 = arg3; 182 return mH.obtainMessage(what, arg1, 0, args); 183 } 184 185 public Message obtainMessageOO(int what, Object arg1, Object arg2) { 186 SomeArgs args = obtainArgs(); 187 args.arg1 = arg1; 188 args.arg2 = arg2; 189 return mH.obtainMessage(what, 0, 0, args); 190 } 191 192 public Message obtainMessageOOO(int what, Object arg1, Object arg2, Object arg3) { 193 SomeArgs args = obtainArgs(); 194 args.arg1 = arg1; 195 args.arg2 = arg2; 196 args.arg3 = arg3; 197 return mH.obtainMessage(what, 0, 0, args); 198 } 199 200 public Message obtainMessageOOOO(int what, Object arg1, Object arg2, 201 Object arg3, Object arg4) { 202 SomeArgs args = obtainArgs(); 203 args.arg1 = arg1; 204 args.arg2 = arg2; 205 args.arg3 = arg3; 206 args.arg4 = arg4; 207 return mH.obtainMessage(what, 0, 0, args); 208 } 209 210 public Message obtainMessageIIII(int what, int arg1, int arg2, 211 int arg3, int arg4) { 212 SomeArgs args = obtainArgs(); 213 args.argi1 = arg1; 214 args.argi2 = arg2; 215 args.argi3 = arg3; 216 args.argi4 = arg4; 217 return mH.obtainMessage(what, 0, 0, args); 218 } 219 220 public Message obtainMessageIIIIII(int what, int arg1, int arg2, 221 int arg3, int arg4, int arg5, int arg6) { 222 SomeArgs args = obtainArgs(); 223 args.argi1 = arg1; 224 args.argi2 = arg2; 225 args.argi3 = arg3; 226 args.argi4 = arg4; 227 args.argi5 = arg5; 228 args.argi6 = arg6; 229 return mH.obtainMessage(what, 0, 0, args); 230 } 231 232 public Message obtainMessageIIIIO(int what, int arg1, int arg2, 233 int arg3, int arg4, Object arg5) { 234 SomeArgs args = obtainArgs(); 235 args.arg1 = arg5; 236 args.argi1 = arg1; 237 args.argi2 = arg2; 238 args.argi3 = arg3; 239 args.argi4 = arg4; 240 return mH.obtainMessage(what, 0, 0, args); 241 } 242 } 243
