Android ：Process xxxxx (pid xxxxx) has died

该log所在文件处：frameworks/base/services/core/java/com/android/server/am/ActivityManagerService.java

final void appDiedLocked(ProcessRecord app, int pid,
IApplicationThread thread) {
// First check if this ProcessRecord is actually active for the pid.
synchronized (mPidsSelfLocked) {
ProcessRecord curProc = mPidsSelfLocked.get(pid);
if (curProc != app) {
Slog.w(TAG, "Spurious death for " + app + ", curProc for " + pid + ": " + curProc);
return;
}
}

BatteryStatsImpl stats = mBatteryStatsService.getActiveStatistics();
synchronized (stats) {
stats.noteProcessDiedLocked(app.info.uid, pid);
}

if (!app.killed) {
Process.killProcessQuiet(pid);
Process.killProcessGroup(app.uid, pid);
app.killed = true;
}

// Clean up already done if the process has been re-started.
if (app.pid == pid && app.thread != null && app.thread.asBinder() == thread.asBinder()) {
boolean doLowMem = app.instrumentationClass == null;
boolean doOomAdj = doLowMem;
if (!app.killedByAm) {
Slog.i(TAG, "Process " + app.processName + " (pid " + pid + ") has died");
mAllowLowerMemLevel = true;
} else {
// Note that we always want to do oom adj to update our state with the new number of procs.
mAllowLowerMemLevel = false;
doLowMem = false;
}
EventLog.writeEvent(EventLogTags.AM_PROC_DIED, app.userId, app.pid, app.processName);
if (DEBUG_CLEANUP)
Slog.v(TAG, "Dying app: " + app + ", pid: " + pid + ", thread: " + thread.asBinder());
handleAppDiedLocked(app, false, true);
if (doOomAdj) {
updateOomAdjLocked();
}
if(doLowMem) {
doLowMemReportIfNeededLocked(app);
}
} else if (app.pid != pid) {

// A new process has already been started.
Slog.i(TAG, "Process " + app.processName + " (pid " + pid+ ") has died and restarted (pid " + app.pid + ").");

EventLog.writeEvent(EventLogTags.AM_PROC_DIED, app.userId, app.pid, app.processName);
} else if (DEBUG_PROCESSES) {
Slog.d(TAG, "Received spurious death notification for thread " + thread.asBinder());
}
}

从代码中发现，当app.killedByAm = false，就会出现died的log。
IBinder所对应的Service进程异常退出（被杀）造成的。
那么service被杀除了service本身代码逻辑的问题，很多情况就是系统内存不足时引起的
简单讲不是ActivityManager主动kill该应用，而是LowMemory的原因(for RAM)。

如果想过滤掉具体特定应用可在此操作：
if (!app.killed) {
Process.killProcessQuiet(pid);
Process.killProcessGroup(app.uid, pid);
app.killed = true;
}
--------------------- 修改成：
if (!app.killed) {
if(!"packagename".equals(app.processName)){
Process.killProcessQuiet(pid);
Process.killProcessGroup(app.uid, pid);
}
app.killed = true;
}

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