framework(一)：ActivityThread-笔记

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我是靠谱客的博主虚幻裙子，这篇文章主要介绍framework(一)：ActivityThread-笔记，现在分享给大家，希望可以做个参考。

ActivityThread 的功能是管理应用程序进程中的主线程，包括调度和执行Activity，broadcasts以及其它的请求操作。

当用户打开一个应用程序时，会由AMS（ActivityMangerService）创建一个ActivityThread，当然ActivityThread并不是一个线程类，但是其所在的线程就是主线程，也就是常说的UI 线程。

复制代码

public static void main(String[] args) {
5185
SamplingProfilerIntegration.start();
5186
5187
// CloseGuard defaults to true and can be quite spammy.
We
5188
// disable it here, but selectively enable it later (via
5189
// StrictMode) on debug builds, but using DropBox, not logs.
5190
CloseGuard.setEnabled(false);
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Environment.initForCurrentUser();
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// Set the reporter for event logging in libcore
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EventLogger.setReporter(new EventLoggingReporter());
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Security.addProvider(new AndroidKeyStoreProvider());
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5199
// Make sure TrustedCertificateStore looks in the right place for CA certificates
5200
final File configDir = Environment.getUserConfigDirectory(UserHandle.myUserId());
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TrustedCertificateStore.setDefaultUserDirectory(configDir);
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Process.setArgV0("<pre-initialized>");
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Looper.prepareMainLooper();
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ActivityThread thread = new ActivityThread();
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thread.attach(false);
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if (sMainThreadHandler == null) {
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sMainThreadHandler = thread.getHandler();
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}
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AsyncTask.init();
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if (false) {
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Looper.myLooper().setMessageLogging(new
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LogPrinter(Log.DEBUG, "ActivityThread"));
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}
5220
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Looper.loop();
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throw new RuntimeException("Main thread loop unexpectedly exited");
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}
5225}

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public static void main(String[] args) {
5185
SamplingProfilerIntegration.start();
5186
5187
// CloseGuard defaults to true and can be quite spammy.
We
5188
// disable it here, but selectively enable it later (via
5189
// StrictMode) on debug builds, but using DropBox, not logs.
5190
CloseGuard.setEnabled(false);
5191
5192
Environment.initForCurrentUser();
5193
5194
// Set the reporter for event logging in libcore
5195
EventLogger.setReporter(new EventLoggingReporter());
5196
5197
Security.addProvider(new AndroidKeyStoreProvider());
5198
5199
// Make sure TrustedCertificateStore looks in the right place for CA certificates
5200
final File configDir = Environment.getUserConfigDirectory(UserHandle.myUserId());
5201
TrustedCertificateStore.setDefaultUserDirectory(configDir);
5202
5203
Process.setArgV0("<pre-initialized>");
5204
5205
Looper.prepareMainLooper();
5206
5207
ActivityThread thread = new ActivityThread();
5208
thread.attach(false);
5209
5210
if (sMainThreadHandler == null) {
5211
sMainThreadHandler = thread.getHandler();
5212
}
5213
5214
AsyncTask.init();
5215
5216
if (false) {
5217
Looper.myLooper().setMessageLogging(new
5218
LogPrinter(Log.DEBUG, "ActivityThread"));
5219
}
5220
5221
Looper.loop();
5222
5223
throw new RuntimeException("Main thread loop unexpectedly exited");
5224
}
5225}