Add simple null checks to StorageWizard*, also listen to...

the disk destroyed event.

Bug 21336042

Change-Id: I9f53501a6122a4a9046774e3c4c08b5d6d6f8552

src/com/android/settings/deviceinfo/StorageWizardBase.java

@@ -20,8 +20,10 @@ import android.app.Activity;
 import android.graphics.Color;
 import android.os.Bundle;
 import android.os.storage.DiskInfo;
+import android.os.storage.StorageEventListener;
 import android.os.storage.StorageManager;
 import android.os.storage.VolumeInfo;
+import android.os.storage.VolumeRecord;
 import android.text.TextUtils;
 import android.view.View;
 import android.view.WindowManager;
@@ -63,6 +65,10 @@ public abstract class StorageWizardBase extends Activity implements NavigationBa
         }
 
         setTheme(R.style.SuwThemeMaterial_Light);
+
+        if (mDisk != null) {
+            mStorage.registerListener(mStorageListener);
+        }
     }
 
     @Override
@@ -82,6 +88,12 @@ public abstract class StorageWizardBase extends Activity implements NavigationBa
         getBackButton().setVisibility(View.GONE);
     }
 
+    @Override
+    protected void onDestroy() {
+        mStorage.unregisterListener(mStorageListener);
+        super.onDestroy();
+    }
+
     protected NavigationBar getNavigationBar() {
         return (NavigationBar) findViewById(R.id.suw_layout_navigation_bar);
     }
@@ -142,4 +154,14 @@ public abstract class StorageWizardBase extends Activity implements NavigationBa
         }
         return null;
     }
+
+    private final StorageEventListener mStorageListener = new StorageEventListener() {
+        @Override
+        public void onDiskDestroyed(DiskInfo disk) {
+            // We know mDisk != null.
+            if (mDisk.id.equals(disk.id)) {
+                finish();
+            }
+        }
+    };
 }

src/com/android/settings/deviceinfo/StorageWizardFormatConfirm.java

@@ -32,10 +32,12 @@ public class StorageWizardFormatConfirm extends StorageWizardBase {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        if (mDisk == null) {
+            finish();
+            return;
+        }
         setContentView(R.layout.storage_wizard_generic);
 
-        Preconditions.checkNotNull(mDisk);
-
         mFormatPrivate = getIntent().getBooleanExtra(EXTRA_FORMAT_PRIVATE, false);
 
         if (mFormatPrivate) {

src/com/android/settings/deviceinfo/StorageWizardFormatProgress.java

@@ -44,10 +44,12 @@ public class StorageWizardFormatProgress extends StorageWizardBase {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        if (mDisk == null) {
+            finish();
+            return;
+        }
         setContentView(R.layout.storage_wizard_progress);
 
-        Preconditions.checkNotNull(mDisk);
-
         mFormatPrivate = getIntent().getBooleanExtra(
                 StorageWizardFormatConfirm.EXTRA_FORMAT_PRIVATE, false);
 

src/com/android/settings/deviceinfo/StorageWizardInit.java

@@ -34,10 +34,12 @@ public class StorageWizardInit extends StorageWizardBase {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        if (mDisk == null) {
+            finish();
+            return;
+        }
         setContentView(R.layout.storage_wizard_init);
 
-        Preconditions.checkNotNull(mDisk);
-
         setHeaderText(R.string.storage_wizard_init_title, mDisk.getDescription());
 
         mRadioExternal = (RadioButton) findViewById(R.id.storage_wizard_init_external_title);

src/com/android/settings/deviceinfo/StorageWizardMigrate.java

@@ -35,10 +35,12 @@ public class StorageWizardMigrate extends StorageWizardBase {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        if (mDisk == null) {
+            finish();
+            return;
+        }
         setContentView(R.layout.storage_wizard_migrate);
 
-        Preconditions.checkNotNull(mDisk);
-
         setHeaderText(R.string.storage_wizard_migrate_title, mDisk.getDescription());
         setBodyText(R.string.memory_calculating_size);
 

src/com/android/settings/deviceinfo/StorageWizardMigrateConfirm.java

@@ -36,6 +36,11 @@ public class StorageWizardMigrateConfirm extends StorageWizardBase {
             mVolume = findFirstVolume(VolumeInfo.TYPE_PRIVATE);
         }
 
+        if (mVolume == null) {
+            finish();
+            return;
+        }
+
         final VolumeInfo sourceVol = getPackageManager().getPrimaryStorageCurrentVolume();
         final String sourceDescrip = mStorage.getBestVolumeDescription(sourceVol);
         final String targetDescrip = mStorage.getBestVolumeDescription(mVolume);

src/com/android/settings/deviceinfo/StorageWizardMigrateProgress.java

@@ -39,10 +39,12 @@ public class StorageWizardMigrateProgress extends StorageWizardBase {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        if (mVolume == null) {
+            finish();
+            return;
+        }
         setContentView(R.layout.storage_wizard_progress);
 
-        Preconditions.checkNotNull(mVolume);
-
         mMoveId = getIntent().getIntExtra(EXTRA_MOVE_ID, -1);
 
         final String descrip = mStorage.getBestVolumeDescription(mVolume);

src/com/android/settings/deviceinfo/StorageWizardMoveConfirm.java

@@ -36,6 +36,10 @@ public class StorageWizardMoveConfirm extends StorageWizardBase {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        if (mVolume == null) {
+            finish();
+            return;
+        }
         setContentView(R.layout.storage_wizard_generic);
 
         try {
@@ -45,9 +49,6 @@ public class StorageWizardMoveConfirm extends StorageWizardBase {
             throw new RuntimeException(e);
         }
 
-        Preconditions.checkNotNull(mVolume);
-        Preconditions.checkNotNull(mApp);
-
         // Sanity check that target volume is candidate
         Preconditions.checkState(
                 getPackageManager().getPackageCandidateVolumes(mApp).contains(mVolume));

src/com/android/settings/deviceinfo/StorageWizardMoveProgress.java

@@ -36,6 +36,10 @@ public class StorageWizardMoveProgress extends StorageWizardBase {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        if (mVolume == null) {
+            finish();
+            return;
+        }
         setContentView(R.layout.storage_wizard_progress);
 
         mMoveId = getIntent().getIntExtra(EXTRA_MOVE_ID, -1);

src/com/android/settings/deviceinfo/StorageWizardReady.java

@@ -26,10 +26,12 @@ public class StorageWizardReady extends StorageWizardBase {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        if (mDisk == null) {
+            finish();
+            return;
+        }
         setContentView(R.layout.storage_wizard_generic);
 
-        Preconditions.checkNotNull(mDisk);
-
         setHeaderText(R.string.storage_wizard_ready_title, mDisk.getDescription());
 
         // TODO: handle mixed partition cases instead of just guessing based on