Index: net/android/java/src/org/chromium/net/AndroidCellularSignalStrength.java |
diff --git a/net/android/java/src/org/chromium/net/AndroidCellularSignalStrength.java b/net/android/java/src/org/chromium/net/AndroidCellularSignalStrength.java |
index 06a0a9f0c114ef7d42584b8cd86803130460ae7a..c5f50d0e6b04458b8b680dc33771658388613a59 100644 |
--- a/net/android/java/src/org/chromium/net/AndroidCellularSignalStrength.java |
+++ b/net/android/java/src/org/chromium/net/AndroidCellularSignalStrength.java |
@@ -4,156 +4,111 @@ |
package org.chromium.net; |
-import android.Manifest; |
import android.annotation.TargetApi; |
import android.content.Context; |
-import android.content.pm.PackageManager; |
import android.os.Build; |
-import android.os.Process; |
-import android.telephony.CellInfo; |
-import android.telephony.CellInfoCdma; |
-import android.telephony.CellInfoGsm; |
-import android.telephony.CellInfoLte; |
-import android.telephony.CellInfoWcdma; |
+import android.os.Handler; |
+import android.os.HandlerThread; |
+import android.telephony.PhoneStateListener; |
+import android.telephony.SignalStrength; |
import android.telephony.TelephonyManager; |
+import org.chromium.base.ApplicationState; |
+import org.chromium.base.ApplicationStatus; |
import org.chromium.base.ContextUtils; |
+import org.chromium.base.ThreadUtils; |
import org.chromium.base.annotations.CalledByNative; |
import org.chromium.base.annotations.JNINamespace; |
-import java.util.Iterator; |
-import java.util.List; |
- |
/** |
- * This class interacts with the CellInfo API provided by Android. This class is thread safe. |
+ * This class provides the cellular signal strength using the APIs provided by Android. This class |
+ * is thread safe. |
*/ |
-@JNINamespace("net::android::cellular_signal_strength") |
+@JNINamespace("net::android") |
public class AndroidCellularSignalStrength { |
- /** |
- * @return Signal strength (in dbM) for the currently registered cellular network. Returns |
- * {@link CellularSignalStrengthError#ERROR_NOT_SUPPORTED} if the signal strength is |
- * unavailable or if there are multiple cellular radios on the device. |
- */ |
- @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2) |
- @CalledByNative |
- public static int getSignalStrengthDbm() { |
- List<CellInfo> cellInfos = getRegisteredCellInfo(); |
- return cellInfos == null || cellInfos.size() != 1 |
- ? CellularSignalStrengthError.ERROR_NOT_SUPPORTED |
- : getSignalStrengthDbm(cellInfos.get(0)); |
- } |
+ // {@link mSignalLevel} is set to volatile since may be accessed across threads. |
+ private volatile int mSignalLevel = CellularSignalStrengthError.ERROR_NOT_SUPPORTED; |
+ |
+ private static final AndroidCellularSignalStrength sInstance = |
+ new AndroidCellularSignalStrength(); |
/** |
- * @return the signal strength level (between 0 and 4, both inclusive) for the currently |
- * registered cellular network with lower value indicating lower signal strength. Returns |
- * {@link CellularSignalStrengthError#ERROR_NOT_SUPPORTED} if the signal strength level is |
- * unavailable or if there are multiple cellular radios on the device. |
+ * This class listens to the changes in the cellular signal strength level and updates {@link |
+ * mSignalLevel}. {@link CellStateListener} registers as a signal strength observer only if the |
+ * application has running activities. |
*/ |
- @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2) |
- @CalledByNative |
- public static int getSignalStrengthLevel() { |
- List<CellInfo> cellInfos = getRegisteredCellInfo(); |
- return cellInfos == null || cellInfos.size() != 1 |
- ? CellularSignalStrengthError.ERROR_NOT_SUPPORTED |
- : getSignalStrengthLevel(cellInfos.get(0)); |
- } |
+ private class CellStateListener |
+ extends PhoneStateListener implements ApplicationStatus.ApplicationStateListener { |
+ private final TelephonyManager mTelephonyManager; |
- /** |
- * Returns true if the API for quering the signal strength is available. |
- * {@link android.telephony#CellInfoWcdma} is only available on API Level |
- * {@link Build.VERSION_CODES#JELLY_BEAN_MR2} and higher. Also verifies that appropriate |
- * permissions are already available. This ensures that on Android M and higher, Chromium will |
- * not request run-time permission from the user when querying for cellular signal strength. |
- * TODO(tbansal): Consider using {@link TelephonyManager#getNeighboringCellInfo} |
- * for earlier versions of Android. |
- */ |
- private static boolean isAPIAvailable() { |
- if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2) return false; |
- |
- try { |
- return ContextUtils.getApplicationContext().checkPermission( |
- Manifest.permission.ACCESS_COARSE_LOCATION, Process.myPid(), |
- Process.myUid()) |
- == PackageManager.PERMISSION_GRANTED; |
- } catch (Exception ignored) { |
- // Work around certain platforms where this method sometimes throws a runtime exception. |
- // See crbug.com/663360. |
+ CellStateListener() { |
+ ThreadUtils.assertOnBackgroundThread(); |
+ |
+ mTelephonyManager = |
+ (TelephonyManager) ContextUtils.getApplicationContext().getSystemService( |
+ Context.TELEPHONY_SERVICE); |
+ |
+ if (mTelephonyManager.getSimState() != TelephonyManager.SIM_STATE_READY) return; |
+ |
+ ApplicationStatus.registerApplicationStateListener(this); |
+ onApplicationStateChange(ApplicationStatus.getStateForApplication()); |
} |
- return false; |
- } |
- /** |
- * Returns all observed cell information from all radios on the device including the primary |
- * and neighboring cells. Returns only the information of cells that are registered to a |
- * mobile network. May return {@code null}. |
- */ |
- @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2) |
- private static List<CellInfo> getRegisteredCellInfo() { |
- if (!isAPIAvailable()) { |
- return null; |
+ private void register() { |
+ mTelephonyManager.listen(this, PhoneStateListener.LISTEN_SIGNAL_STRENGTHS); |
} |
- TelephonyManager telephonyManager = |
- (TelephonyManager) ContextUtils.getApplicationContext().getSystemService( |
- Context.TELEPHONY_SERVICE); |
- if (telephonyManager == null) { |
- return null; |
+ private void unregister() { |
+ mSignalLevel = CellularSignalStrengthError.ERROR_NOT_SUPPORTED; |
+ mTelephonyManager.listen(this, PhoneStateListener.LISTEN_NONE); |
} |
- List<CellInfo> cellInfos = telephonyManager.getAllCellInfo(); |
- if (cellInfos == null) { |
- return null; |
+ @Override |
+ @TargetApi(Build.VERSION_CODES.M) |
+ public void onSignalStrengthsChanged(SignalStrength signalStrength) { |
+ if (ApplicationStatus.getStateForApplication() |
+ != ApplicationState.HAS_RUNNING_ACTIVITIES) { |
+ return; |
+ } |
+ mSignalLevel = signalStrength.getLevel(); |
} |
- Iterator<CellInfo> iter = cellInfos.iterator(); |
- while (iter.hasNext()) { |
- if (!iter.next().isRegistered()) { |
- iter.remove(); |
+ // ApplicationStatus.ApplicationStateListener |
+ @Override |
+ public void onApplicationStateChange(int newState) { |
+ if (newState == ApplicationState.HAS_RUNNING_ACTIVITIES) { |
+ register(); |
+ } else if (newState == ApplicationState.HAS_PAUSED_ACTIVITIES) { |
+ unregister(); |
} |
} |
- return cellInfos; |
} |
- /** |
- * @return Signal strength (in dbM) from {@link cellInfo}. Returns {@link |
- * CellularSignalStrengthError#ERROR_NOT_SUPPORTED} if the signal strength is unavailable. |
- */ |
- @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2) |
- private static int getSignalStrengthDbm(CellInfo cellInfo) { |
- if (cellInfo instanceof CellInfoCdma) { |
- return ((CellInfoCdma) cellInfo).getCellSignalStrength().getDbm(); |
- } |
- if (cellInfo instanceof CellInfoGsm) { |
- return ((CellInfoGsm) cellInfo).getCellSignalStrength().getDbm(); |
- } |
- if (cellInfo instanceof CellInfoLte) { |
- return ((CellInfoLte) cellInfo).getCellSignalStrength().getDbm(); |
- } |
- if (cellInfo instanceof CellInfoWcdma) { |
- return ((CellInfoWcdma) cellInfo).getCellSignalStrength().getDbm(); |
- } |
- return CellularSignalStrengthError.ERROR_NOT_SUPPORTED; |
+ private AndroidCellularSignalStrength() { |
+ // {@link android.telephony.SignalStrength#getLevel} is only available on API Level |
+ // {@link Build.VERSION_CODES#M} and higher. |
+ if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) return; |
+ |
+ HandlerThread handlerThread = new HandlerThread("AndroidCellularSignalStrength"); |
+ handlerThread.start(); |
+ |
+ new Handler(handlerThread.getLooper()).post(new Runnable() { |
+ @Override |
+ public void run() { |
+ new CellStateListener(); |
+ } |
+ }); |
} |
/** |
- * @return the signal level from {@link cellInfo}. Returns {@link |
- * CellularSignalStrengthError#ERROR_NOT_SUPPORTED} if the signal |
- * level is unavailable with lower value indicating lower signal strength. |
+ * @return the signal strength level (between 0 and 4, both inclusive) for the currently |
+ * registered cellular network with lower value indicating lower signal strength. Returns |
+ * {@link CellularSignalStrengthError#ERROR_NOT_SUPPORTED} if the signal strength level is |
+ * unavailable. |
*/ |
- @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2) |
- private static int getSignalStrengthLevel(CellInfo cellInfo) { |
- if (cellInfo instanceof CellInfoCdma) { |
- return ((CellInfoCdma) cellInfo).getCellSignalStrength().getLevel(); |
- } |
- if (cellInfo instanceof CellInfoGsm) { |
- return ((CellInfoGsm) cellInfo).getCellSignalStrength().getLevel(); |
- } |
- if (cellInfo instanceof CellInfoLte) { |
- return ((CellInfoLte) cellInfo).getCellSignalStrength().getLevel(); |
- } |
- if (cellInfo instanceof CellInfoWcdma) { |
- return ((CellInfoWcdma) cellInfo).getCellSignalStrength().getLevel(); |
- } |
- return CellularSignalStrengthError.ERROR_NOT_SUPPORTED; |
+ @TargetApi(Build.VERSION_CODES.M) |
+ @CalledByNative |
+ private static int getSignalStrengthLevel() { |
+ return sInstance.mSignalLevel; |
} |
} |