Support for changing traces from development settings.

Publish information needed to build UI, fix SystemProperties.getLong()
to be able to read this property, fix some issues in
MultiCheckPreference.

Change-Id: I10c8ff84a167fdb42f6c93500201b78b844cfb8b

Author: Dianne Hackborn

core/java/android/os/Trace.java

@@ -39,6 +39,14 @@ public final class Trace {
     public static final long TRACE_TAG_SYNC_MANAGER = 1L << 7;
     public static final long TRACE_TAG_AUDIO = 1L << 8;
 
+    public static final int TRACE_FLAGS_START_BIT = 1;
+    public static final String[] TRACE_TAGS = {
+        "Graphics", "Input", "View", "WebView", "Window Manager",
+        "Activity Manager", "Sync Manager", "Audio"
+    };
+
+    public static final String PROPERTY_TRACE_TAG_ENABLEFLAGS = "debug.atrace.tags.enableflags";
+
     private static final long sEnabledTags = nativeGetEnabledTags();
 
     private static native long nativeGetEnabledTags();

core/java/android/preference/MultiCheckPreference.java

@@ -136,10 +136,24 @@ private void setEntryValuesCS(CharSequence[] values) {
      * 
      * @return The array of values.
      */
-    public CharSequence[] getEntryValues() {
+    public String[] getEntryValues() {
         return mEntryValues;
     }
 
+    /**
+     * Get the boolean state of a given value.
+     */
+    public boolean getValue(int index) {
+        return mSetValues[index];
+    }
+
+    /**
+     * Set the boolean state of a given value.
+     */
+    public void setValue(int index, boolean state) {
+        mSetValues[index] = state;
+    }
+
     /**
      * Sets the current values.
      */

core/jni/android_os_SystemProperties.cpp

@@ -65,6 +65,7 @@ static jint SystemProperties_get_int(JNIEnv *env, jobject clazz,
     int len;
     const char* key;
     char buf[PROPERTY_VALUE_MAX];
+    char* end;
     jint result = defJ;
 
     if (keyJ == NULL) {
@@ -76,9 +77,10 @@ static jint SystemProperties_get_int(JNIEnv *env, jobject clazz,
 
     len = property_get(key, buf, "");
     if (len > 0) {
-        jint temp;
-        if (sscanf(buf, "%d", &temp) == 1)
-            result = temp;
+        result = strtol(buf, &end, 0);
+        if (end == buf) {
+            result = defJ;
+        }
     }
 
     env->ReleaseStringUTFChars(keyJ, key);
@@ -93,6 +95,7 @@ static jlong SystemProperties_get_long(JNIEnv *env, jobject clazz,
     int len;
     const char* key;
     char buf[PROPERTY_VALUE_MAX];
+    char* end;
     jlong result = defJ;
 
     if (keyJ == NULL) {
@@ -104,9 +107,10 @@ static jlong SystemProperties_get_long(JNIEnv *env, jobject clazz,
 
     len = property_get(key, buf, "");
     if (len > 0) {
-        jlong temp;
-        if (sscanf(buf, "%lld", &temp) == 1)
-            result = temp;
+        result = strtoll(buf, &end, 0);
+        if (end == buf) {
+            result = defJ;
+        }
     }
 
     env->ReleaseStringUTFChars(keyJ, key);