Android StrictMode運(yùn)行流程(推薦)

 * public void onCreate() {
 * if (DEVELOPER_MODE) {
 * StrictMode.setThreadPolicy(new {@link ThreadPolicy.Builder StrictMode.ThreadPolicy.Builder}()
 *  .detectDiskReads()
 *  .detectDiskWrites()
 *  .detectNetwork() // or .detectAll() for all detectable problems
 *  .penaltyLog()
 *  .build());
 * StrictMode.setVmPolicy(new {@link VmPolicy.Builder StrictMode.VmPolicy.Builder}()
 *  .detectLeakedSqlLiteObjects()
 *  .detectLeakedClosableObjects()
 *  .penaltyLog()
 *  .penaltyDeath()
 *  .build());
 * }
 * super.onCreate();

 public static void setThreadPolicy(final ThreadPolicy policy) {
 setThreadPolicyMask(policy.mask);
 }

private static void setThreadPolicyMask(final int policyMask) {
 // In addition to the Java-level thread-local in Dalvik's
 // BlockGuard, we also need to keep a native thread-local in
 // Binder in order to propagate the value across Binder calls,
 // even across native-only processes. The two are kept in
 // sync via the callback to onStrictModePolicyChange, below.
 setBlockGuardPolicy(policyMask);
 // And set the Android native version...
 Binder.setThreadStrictModePolicy(policyMask);
 }

// Sets the policy in Dalvik/libcore (BlockGuard)
 private static void setBlockGuardPolicy(final int policyMask) {
 if (policyMask == 0) {
 BlockGuard.setThreadPolicy(BlockGuard.LAX_POLICY);
 return;
 }
 final BlockGuard.Policy policy = BlockGuard.getThreadPolicy();
 final AndroidBlockGuardPolicy androidPolicy;
 if (policy instanceof AndroidBlockGuardPolicy) {
 androidPolicy = (AndroidBlockGuardPolicy) policy;
 } else {
 androidPolicy = threadAndroidPolicy.get();
 BlockGuard.setThreadPolicy(androidPolicy);
 }
 androidPolicy.setPolicyMask(policyMask);
 }

386void IPCThreadState::setStrictModePolicy(int32_t policy)
387{
388 mStrictModePolicy = policy;
389}

mCursor = mResolver.query(mUri, null, null, null, null);

@Override
 protected void finalize() throws Throwable {
 try {
 if (mCloseGuard != null) {
  mCloseGuard.warnIfOpen();
 }
 if (!mProviderReleased && mContentProvider != null) {
  // Even though we are using CloseGuard, log this anyway so that
  // application developers always see the message in the log.
  Log.w(TAG, "Cursor finalized without prior close()");
  ContentResolver.this.releaseProvider(mContentProvider);
 }
 } finally {
 super.finalize();
 }
 }
 }
 public void warnIfOpen() {
 if (allocationSite == null || !ENABLED) {
 return;
 }
 String message = 
 ("A resource was acquired at attached stack trace but never released. "
  + "See java.io.Closeable for information on avoiding resource leaks.");
 REPORTER.report(message, allocationSite);
 }
 @Override public void report (String message, Throwable allocationSite) {
 System.logW(message, allocationSite);
 }
 CursorWrapperInner(Cursor cursor, IContentProvider icp) {
 super(cursor);
 mContentProvider = icp;
 mCloseGuard.open("close");
 }

 /**
 * Release the native resources, if they haven't been released yet.
 */
 @Override
 protected void finalize() {
 try {
 // if the cursor hasn't been closed yet, close it first
 if (mWindow != null) {
 if (mStackTrace != null) {
  String sql = mQuery.getSql();
  int len = sql.length();
  StrictMode.onSqliteObjectLeaked(
  "Finalizing a Cursor that has not been deactivated or closed. " +
  "database = " + mQuery.getDatabase().getLabel() +
  ", table = " + mEditTable +
  ", query = " + sql.substring(0, (len > 1000) ? 1000 : len),
  mStackTrace);
 }
 close();
 }
 } finally {
 super.finalize();
 }
 }