标签:startAcitivity java final public Binder intent Android null options
以 startActivity(newIntent); 为例
路径 frameworks/base/core/java/android/app/Activity.java
@Override
public void startActivity(Intent intent, @Nullable Bundle options) {
if (options != null) {
startActivityForResult(intent, -1, options);
} else {
// Note we want to go through this call for compatibility with
// applications that may have overridden the method.
startActivityForResult(intent, -1);
}
}
调用 mInstrumentation.execStartActivity
public void startActivityForResult(@RequiresPermission Intent intent, int requestCode,
@Nullable Bundle options) {
if (mParent == null) {
options = transferSpringboardActivityOptions(options);
Instrumentation.ActivityResult ar =
mInstrumentation.execStartActivity(
this, mMainThread.getApplicationThread(), mToken, this,
intent, requestCode, options);
...
}
mMainThread.getApplicationThread()实现为
路径 frameworks/base/core/java/android/app/ActivityThread.java
public ApplicationThread getApplicationThread()
{
return mAppThread;
}
final ApplicationThread mAppThread = new ApplicationThread();
private class ApplicationThread extends IApplicationThread.Stub
实际上这也是一个binder通信类 把这个传过去 就实现了binder的双向通信
路径 frameworks/base/core/java/android/app/Instrumentation.java
调用 ActivityManager.getService().startActivity
public ActivityResult execStartActivity(
Context who, IBinder contextThread, IBinder token, Activity target,
Intent intent, int requestCode, Bundle options) {
IApplicationThread whoThread = (IApplicationThread) contextThread;
...
int result = ActivityManager.getService()
.startActivity(whoThread, who.getBasePackageName(), intent,
intent.resolveTypeIfNeeded(who.getContentResolver()),
token, target != null ? target.mEmbeddedID : null,
requestCode, 0, null, options);
checkStartActivityResult(result, intent);
} catch (RemoteException e) {
throw new RuntimeException("Failure from system", e);
}
return null;
}
路径 frameworks/base/core/java/android/app/ActivityManager.java
public static final String ACTIVITY_SERVICE = "activity";
public static IActivityManager getService() {
return IActivityManagerSingleton.get();
}
private static final Singleton<IActivityManager> IActivityManagerSingleton =
new Singleton<IActivityManager>() {
@Override
protected IActivityManager create() {
final IBinder b = ServiceManager.getService(Context.ACTIVITY_SERVICE);
final IActivityManager am = IActivityManager.Stub.asInterface(b);
return am;
}
};
关于服务何时被add到ServiceManager中的可以参考这篇
android8.1启动过程(八) SystemServer 下_we1less的博客-CSDN博客
标签:startAcitivity,java,final,public,Binder,intent,Android,null,options 来源: https://blog.csdn.net/we1less/article/details/120444679
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