public static void start() {

        Looper.getMainLooper().setMessageLogging(new Printer() {

            private static final String START = ">>>>> Dispatching";
            private static final String END = "<<<<< Finished";

            @Override
            public void println(String x) {
                if (x.startsWith(START)) {
                    LogMonitor.getInstance().startMonitor();
                }
                if (x.startsWith(END)) {
                    LogMonitor.getInstance().removeMonitor();
                }
            }
        });

    }
 

@SuppressWarnings("unused")
@Override
protected void dump(FileDescriptor fd, PrintWriter fout, String[] args) {
    if (!DumpUtils.checkDumpPermission(mContext, TAG, fout)) return;
    if (!DEBUG) return;
    try {
        final Printer p = new PrintWriterPrinter(fout);
        p.println("CountryDetectorService state:");
        p.println("  Number of listeners=" + mReceivers.keySet().size());
        if (mCountryDetector == null) {
            p.println("  ComprehensiveCountryDetector not initialized");
        } else {
            p.println("  " + mCountryDetector.toString());
        }
    } catch (Exception e) {
        Slog.e(TAG, "Failed to dump CountryDetectorService: ", e);
    }
}
 

/**
 * Write debug output of this object.
 */
public void dump(Printer pw, String prefix) {
    pw.println(prefix + "inputType=0x" + Integer.toHexString(inputType)
            + " imeOptions=0x" + Integer.toHexString(imeOptions)
            + " privateImeOptions=" + privateImeOptions);
    pw.println(prefix + "actionLabel=" + actionLabel
            + " actionId=" + actionId);
    pw.println(prefix + "initialSelStart=" + initialSelStart
            + " initialSelEnd=" + initialSelEnd
            + " initialCapsMode=0x"
            + Integer.toHexString(initialCapsMode));
    pw.println(prefix + "hintText=" + hintText
            + " label=" + label);
    pw.println(prefix + "packageName=" + packageName
            + " fieldId=" + fieldId
            + " fieldName=" + fieldName);
    pw.println(prefix + "extras=" + extras);
    pw.println(prefix + "hintLocales=" + hintLocales);
    pw.println(prefix + "contentMimeTypes=" + Arrays.toString(contentMimeTypes));
}
 

public void dump(Printer printer) {
    printer.println("  Prepared statement cache:");
    Map<String, PreparedStatement> cache = snapshot();
    if (!cache.isEmpty()) {
        int i = 0;
        for (Map.Entry<String, PreparedStatement> entry : cache.entrySet()) {
            PreparedStatement statement = entry.getValue();
            if (statement.mInCache) { // might be false due to a race with entryRemoved
                String sql = entry.getKey();
                printer.println("    " + i + ": statementPtr=0x"
                        + Long.toHexString(statement.mStatementPtr)
                        + ", numParameters=" + statement.mNumParameters
                        + ", type=" + statement.mType
                        + ", readOnly=" + statement.mReadOnly
                        + ", sql=\"" + trimSqlForDisplay(sql) + "\"");
            }
            i += 1;
        }
    } else {
        printer.println("    <none>");
    }
}
 

/**
 * Dump the report to a Printer.
 */
public void dump(Printer pw, String prefix) {
    pw.println(prefix + "type: " + type);
    pw.println(prefix + "packageName: " + packageName);
    pw.println(prefix + "installerPackageName: " + installerPackageName);
    pw.println(prefix + "processName: " + processName);
    pw.println(prefix + "time: " + time);
    pw.println(prefix + "systemApp: " + systemApp);

    switch (type) {
        case TYPE_CRASH:
            crashInfo.dump(pw, prefix);
            break;
        case TYPE_ANR:
            anrInfo.dump(pw, prefix);
            break;
        case TYPE_BATTERY:
            batteryInfo.dump(pw, prefix);
            break;
        case TYPE_RUNNING_SERVICE:
            runningServiceInfo.dump(pw, prefix);
            break;
    }
}
 

@Override
protected void dump(FileDescriptor fd, PrintWriter fout, String[] args) {
    super.dump(fd, fout, args);

    final Printer p = new PrintWriterPrinter(fout);
    p.println("LatinIME state :");
    p.println("  Keyboard mode = " + mKeyboardSwitcher.getKeyboardMode());
    p.println("  mComposing=" + mComposing.toString());
    p.println("  mPredictionOnForMode=" + mPredictionOnForMode);
    p.println("  mCorrectionMode=" + mCorrectionMode);
    p.println("  mPredicting=" + mPredicting);
    p.println("  mAutoCorrectOn=" + mAutoCorrectOn);
    p.println("  mAutoSpace=" + mAutoSpace);
    p.println("  mCompletionOn=" + mCompletionOn);
    p.println("  TextEntryState.state=" + TextEntryState.getState());
    p.println("  mSoundOn=" + mSoundOn);
    p.println("  mVibrateOn=" + mVibrateOn);
    p.println("  mPopupOn=" + mPopupOn);
}
 

/** Try to retrieve the Network Security Policy resource ID configured in the App's manifest.
 *
 * Somewhat convoluted as other means of getting the resource ID involve using private APIs.
 *
 * @param context
 * @return The resource ID for the XML file containing the configured Network Security Policy or
 * -1 if no policy was configured in the App's manifest or if we are not running on Android N.
 */
static private int getNetSecConfigResourceId(@NonNull Context context) {
    ApplicationInfo info = context.getApplicationInfo();

    // Dump the content of the ApplicationInfo, which contains the resource ID on Android N
    class NetSecConfigResIdRetriever implements Printer {
        private int netSecConfigResourceId = -1;
        private final String NETSEC_LINE_FORMAT = "networkSecurityConfigRes=0x";

        public void println(String x) {
            if (netSecConfigResourceId == -1) {
                // Attempt at parsing "networkSecurityConfigRes=0x1234"
                if (x.contains(NETSEC_LINE_FORMAT)) {
                    netSecConfigResourceId =
                            Integer.parseInt(x.substring(NETSEC_LINE_FORMAT.length()), 16);
                }
            }
        }

        private int getNetworkSecurityConfigResId() { return netSecConfigResourceId; }
    }

    NetSecConfigResIdRetriever retriever = new NetSecConfigResIdRetriever();
    info.dump(retriever, "");
    return retriever.getNetworkSecurityConfigResId();
}
 

public void dump(Printer printer) {
    printer.println("  Prepared statement cache:");
    Map<String, PreparedStatement> cache = snapshot();
    if (!cache.isEmpty()) {
        int i = 0;
        for (Map.Entry<String, PreparedStatement> entry : cache.entrySet()) {
            PreparedStatement statement = entry.getValue();
            if (statement.mInCache) { // might be false due to a race with entryRemoved
                String sql = entry.getKey();
                printer.println("    " + i + ": statementPtr=0x"
                        + Long.toHexString(statement.mStatementPtr)
                        + ", numParameters=" + statement.mNumParameters
                        + ", type=" + statement.mType
                        + ", readOnly=" + statement.mReadOnly
                        + ", sql=\"" + trimSqlForDisplay(sql) + "\"");
            }
            i += 1;
        }
    } else {
        printer.println("    <none>");
    }
}
 

@Override
protected void dump(final FileDescriptor fd, final PrintWriter fout, final String[] args) {
    super.dump(fd, fout, args);

    final Printer p = new PrintWriterPrinter(fout);
    p.println("LatinIME state :");
    p.println("  VersionCode = " + ApplicationUtils.getVersionCode(this));
    p.println("  VersionName = " + ApplicationUtils.getVersionName(this));
    final Keyboard keyboard = mKeyboardSwitcher.getKeyboard();
    final int keyboardMode = keyboard != null ? keyboard.mId.mMode : -1;
    p.println("  Keyboard mode = " + keyboardMode);
    final SettingsValues settingsValues = mSettings.getCurrent();
    p.println(settingsValues.dump());
    p.println(mDictionaryFacilitator.dump(this /* context */));
    // TODO: Dump all settings values
}
 

@Override
protected void dump(final FileDescriptor fd, final PrintWriter fout, final String[] args) {
    super.dump(fd, fout, args);

    final Printer p = new PrintWriterPrinter(fout);
    p.println("LatinIME state :");
    p.println("  VersionCode = " + ApplicationUtils.getVersionCode(this));
    p.println("  VersionName = " + ApplicationUtils.getVersionName(this));
    final Keyboard keyboard = KeyboardSwitcher.getInstance().getKeyboard();
    final int keyboardMode = keyboard != null ? keyboard.mId.mMode : -1;
    p.println("  Keyboard mode = " + keyboardMode);
    final SettingsValues settingsValues = mSettings.getCurrent();
    p.println(settingsValues.dump());
    p.println(mDictionaryFacilitator.dump(this /* context */));
    // TODO: Dump all settings values
}
 

public static void start() {

        Looper.getMainLooper().setMessageLogging(new Printer() {

            private static final String START = ">>>>> Dispatching";
            private static final String END = "<<<<< Finished";

            @Override
            public void println(String x) {
                if (x.startsWith(START)) {
                    LogMonitor.getInstance().startMonitor();
                }
                if (x.startsWith(END)) {
                    LogMonitor.getInstance().removeMonitor();
                }
            }
        });

    }
 

public static void start() {

        Looper.getMainLooper().setMessageLogging(new Printer() {

            private static final String START = ">>>>> Dispatching";
            private static final String END = "<<<<< Finished";

            @Override
            public void println(String x) {
                if (x.startsWith(START)) {
                    LogMonitor.getInstance().startMonitor();
                }
                if (x.startsWith(END)) {
                    LogMonitor.getInstance().removeMonitor();
                }
            }
        });

    }
 

@Override
public void start() {
    super.start();
    if (!mBlockThread.isAlive()) { //防止多次调用
        mBlockThread.start();
        mHandler = new Handler(mBlockThread.getLooper());
        Looper.getMainLooper().setMessageLogging(new Printer() {

            private static final String START = ">>>>> Dispatching";
            private static final String END = "<<<<< Finished";

            @Override
            public void println(String x) {
                if (x.startsWith(START)) {
                    startMonitor();
                }
                if (x.startsWith(END)) {
                    removeMonitor();
                }
            }
        });
    }
}
 

@Override
protected void dump(final FileDescriptor fd, final PrintWriter fout, final String[] args) {
    super.dump(fd, fout, args);

    final Printer p = new PrintWriterPrinter(fout);
    p.println("LatinIME state :");
    p.println("  VersionCode = " + ApplicationUtils.getVersionCode(this));
    p.println("  VersionName = " + ApplicationUtils.getVersionName(this));
    final Keyboard keyboard = mKeyboardSwitcher.getKeyboard();
    final int keyboardMode = keyboard != null ? keyboard.mId.mMode : -1;
    p.println("  Keyboard mode = " + keyboardMode);
    final SettingsValues settingsValues = mSettings.getCurrent();
    p.println(settingsValues.dump());
    p.println(mDictionaryFacilitator.dump(this /* context */));
    // TODO: Dump all settings values
}
 

void dump(PrintWriter pw, String prefix) {
    Printer pr = new PrintWriterPrinter(pw);
    dumpLocal(pw, prefix);
    String p2 = prefix + "  ";
    final int N = size();
    for (int i=0; i<N; i++) {
        BroadcastFilter bf = get(i);
        pw.print(prefix); pw.print("Filter #"); pw.print(i);
                pw.print(": BroadcastFilter{");
                pw.print(Integer.toHexString(System.identityHashCode(bf)));
                pw.println('}');
        bf.dumpInReceiverList(pw, pr, p2);
    }
}
 

public void dump(Printer pw, String prefix) {
    pw.println(prefix + "mId=" + mId
            + " mSettingsActivityName=" + mSettingsActivityName
            + " mIsVrOnly=" + mIsVrOnly
            + " mSupportsSwitchingToNextInputMethod=" + mSupportsSwitchingToNextInputMethod);
    pw.println(prefix + "mIsDefaultResId=0x"
            + Integer.toHexString(mIsDefaultResId));
    pw.println(prefix + "Service:");
    mService.dump(pw, prefix + "  ");
}
 

void doDump(FileDescriptor fd, PrintWriter fout, String[] args) {
    final Printer p = new PrintWriterPrinter(fout);
    p.println("Input method client state for " + this + ":");

    p.println("  mService=" + mService);
    p.println("  mMainLooper=" + mMainLooper);
    p.println("  mIInputContext=" + mIInputContext);
    p.println("  mActive=" + mActive
            + " mRestartOnNextWindowFocus=" + mRestartOnNextWindowFocus
            + " mBindSequence=" + mBindSequence
            + " mCurId=" + mCurId);
    p.println("  mFullscreenMode=" + mFullscreenMode);
    p.println("  mCurMethod=" + mCurMethod);
    p.println("  mCurRootView=" + mCurRootView);
    p.println("  mServedView=" + mServedView);
    p.println("  mNextServedView=" + mNextServedView);
    p.println("  mServedConnecting=" + mServedConnecting);
    if (mCurrentTextBoxAttribute != null) {
        p.println("  mCurrentTextBoxAttribute:");
        mCurrentTextBoxAttribute.dump(p, "    ");
    } else {
        p.println("  mCurrentTextBoxAttribute: null");
    }
    p.println("  mServedInputConnectionWrapper=" + mServedInputConnectionWrapper);
    p.println("  mCompletions=" + Arrays.toString(mCompletions));
    p.println("  mCursorRect=" + mCursorRect);
    p.println("  mCursorSelStart=" + mCursorSelStart
            + " mCursorSelEnd=" + mCursorSelEnd
            + " mCursorCandStart=" + mCursorCandStart
            + " mCursorCandEnd=" + mCursorCandEnd);
    p.println("  mNextUserActionNotificationSequenceNumber="
            + mNextUserActionNotificationSequenceNumber
            + " mLastSentUserActionNotificationSequenceNumber="
            + mLastSentUserActionNotificationSequenceNumber);
}
 

void dump(Printer pw, String prefix, Handler h) {
    synchronized (this) {
        long now = SystemClock.uptimeMillis();
        int n = 0;
        for (Message msg = mMessages; msg != null; msg = msg.next) {
            if (h == null || h == msg.target) {
                pw.println(prefix + "Message " + n + ": " + msg.toString(now));
            }
            n++;
        }
        pw.println(prefix + "(Total messages: " + n + ", polling=" + isPollingLocked()
                + ", quitting=" + mQuitting + ")");
    }
}
 

/** Dump a ViolationInfo instance to a Printer. */
public void dump(Printer pw, String prefix) {
    pw.println(prefix + "stackTrace: " + getStackTrace());
    pw.println(prefix + "policy: " + mPolicy);
    if (durationMillis != -1) {
        pw.println(prefix + "durationMillis: " + durationMillis);
    }
    if (numInstances != -1) {
        pw.println(prefix + "numInstances: " + numInstances);
    }
    if (violationNumThisLoop != 0) {
        pw.println(prefix + "violationNumThisLoop: " + violationNumThisLoop);
    }
    if (numAnimationsRunning != 0) {
        pw.println(prefix + "numAnimationsRunning: " + numAnimationsRunning);
    }
    pw.println(prefix + "violationUptimeMillis: " + violationUptimeMillis);
    if (broadcastIntentAction != null) {
        pw.println(prefix + "broadcastIntentAction: " + broadcastIntentAction);
    }
    if (tags != null) {
        int index = 0;
        for (String tag : tags) {
            pw.println(prefix + "tag[" + (index++) + "]: " + tag);
        }
    }
}
 

public final void dump(Printer pw, String prefix) {
    pw.println(prefix + this + " @ " + SystemClock.uptimeMillis());
    if (mLooper == null) {
        pw.println(prefix + "looper uninitialized");
    } else {
        mLooper.dump(pw, prefix + "  ");
    }
}
 

/**
 * @hide
 */
public final void dumpMine(Printer pw, String prefix) {
    pw.println(prefix + this + " @ " + SystemClock.uptimeMillis());
    if (mLooper == null) {
        pw.println(prefix + "looper uninitialized");
    } else {
        mLooper.dump(pw, prefix + "  ", this);
    }
}
 

/**
 * Dumps detailed information about all databases used by the process.
 * @param printer The printer for dumping database state.
 * @param args Command-line arguments supplied to dumpsys dbinfo
 */
public static void dump(Printer printer, String[] args) {
    boolean verbose = false;
    for (String arg : args) {
        if (arg.equals("-v")) {
            verbose = true;
        }
    }

    SQLiteDatabase.dumpAll(printer, verbose);
}
 

private void dump(Printer printer, boolean verbose) {
    synchronized (mLock) {
        if (mConnectionPoolLocked != null) {
            printer.println("");
            mConnectionPoolLocked.dump(printer, verbose);
        }
    }
}
 

/**
 * Dumps debugging information about this connection, in the case where the
 * caller might not actually own the connection.
 *
 * This function is written so that it may be called by a thread that does not
 * own the connection.  We need to be very careful because the connection state is
 * not synchronized.
 *
 * At worst, the method may return stale or slightly wrong data, however
 * it should not crash.  This is ok as it is only used for diagnostic purposes.
 *
 * @param printer The printer to receive the dump, not null.
 * @param verbose True to dump more verbose information.
 */
void dumpUnsafe(Printer printer, boolean verbose) {
    printer.println("Connection #" + mConnectionId + ":");
    if (verbose) {
        printer.println("  connectionPtr: 0x" + Long.toHexString(mConnectionPtr));
    }
    printer.println("  isPrimaryConnection: " + mIsPrimaryConnection);
    printer.println("  onlyAllowReadOnlyOperations: " + mOnlyAllowReadOnlyOperations);

    mRecentOperations.dump(printer, verbose);

    if (verbose) {
        mPreparedStatementCache.dump(printer);
    }
}
 

public void dump(Printer printer, boolean verbose) {
    synchronized (mOperations) {
        printer.println("  Most recently executed operations:");
        int index = mIndex;
        Operation operation = mOperations[index];
        if (operation != null) {
            // Note: SimpleDateFormat is not thread-safe, cannot be compile-time created,
            // and is relatively expensive to create during preloading. This method is only
            // used when dumping a connection, which is a rare (mainly error) case.
            SimpleDateFormat opDF = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
            int n = 0;
            do {
                StringBuilder msg = new StringBuilder();
                msg.append("    ").append(n).append(": [");
                String formattedStartTime = opDF.format(new Date(operation.mStartWallTime));
                msg.append(formattedStartTime);
                msg.append("] ");
                operation.describe(msg, verbose);
                printer.println(msg.toString());

                if (index > 0) {
                    index -= 1;
                } else {
                    index = MAX_RECENT_OPERATIONS - 1;
                }
                n += 1;
                operation = mOperations[index];
            } while (operation != null && n < MAX_RECENT_OPERATIONS);
        } else {
            printer.println("    <none>");
        }
    }
}
 

/**
 * Dump a CrashInfo instance to a Printer.
 */
public void dump(Printer pw, String prefix) {
    pw.println(prefix + "exceptionClassName: " + exceptionClassName);
    pw.println(prefix + "exceptionMessage: " + exceptionMessage);
    pw.println(prefix + "throwFileName: " + throwFileName);
    pw.println(prefix + "throwClassName: " + throwClassName);
    pw.println(prefix + "throwMethodName: " + throwMethodName);
    pw.println(prefix + "throwLineNumber: " + throwLineNumber);
    pw.println(prefix + "stackTrace: " + stackTrace);
}
 

/**
 * Dump a BatteryInfo instance to a Printer.
 */
public void dump(Printer pw, String prefix) {
    pw.println(prefix + "usagePercent: " + usagePercent);
    pw.println(prefix + "durationMicros: " + durationMicros);
    pw.println(prefix + "usageDetails: " + usageDetails);
    pw.println(prefix + "checkinDetails: " + checkinDetails);
}
 

/** @hide */
public void dump(Printer pw, String prefix, int dumpFlags) {
    super.dumpFront(pw, prefix);
    pw.println(prefix + "authority=" + authority);
    pw.println(prefix + "flags=0x" + Integer.toHexString(flags));
    super.dumpBack(pw, prefix, dumpFlags);
}
 

protected void dumpFront(Printer pw, String prefix) {
    super.dumpFront(pw, prefix);
    if (processName != null && !packageName.equals(processName)) {
        pw.println(prefix + "processName=" + processName);
    }
    if (splitName != null) {
        pw.println(prefix + "splitName=" + splitName);
    }
    pw.println(prefix + "enabled=" + enabled + " exported=" + exported
            + " directBootAware=" + directBootAware);
    if (descriptionRes != 0) {
        pw.println(prefix + "description=" + descriptionRes);
    }
}
 

private void dump(Printer printer, boolean verbose) {
    synchronized (mLock) {
        if (mConnectionPoolLocked != null) {
            printer.println("");
            mConnectionPoolLocked.dump(printer, verbose);
        }
    }
}