1 files changed, 141 insertions, 0 deletions
diff --git a/src/com/android/messaging/ui/PermissionCheckActivity.java b/src/com/android/messaging/ui/PermissionCheckActivity.java
new file mode 100644
index 0000000..e992a10
--- /dev/null
+++ b/src/com/android/messaging/ui/PermissionCheckActivity.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.messaging.ui;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.SystemClock;
+import android.provider.Settings;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.TextView;
+
+import com.android.messaging.Factory;
+import com.android.messaging.R;
+import com.android.messaging.util.OsUtil;
+import com.android.messaging.util.UiUtils;
+
+/**
+ * Activity to check if the user has required permissions. If not, it will try to prompt the user
+ * to grant permissions. However, the OS may not actually prompt the user if the user had
+ * previously checked the "Never ask again" checkbox while denying the required permissions.
+ */
+public class PermissionCheckActivity extends Activity {
+    private static final int REQUIRED_PERMISSIONS_REQUEST_CODE = 1;
+    private static final long AUTOMATED_RESULT_THRESHOLD_MILLLIS = 250;
+    private static final String PACKAGE_URI_PREFIX = "package:";
+    private long mRequestTimeMillis;
+    private TextView mNextView;
+    private TextView mSettingsView;
+
+    @Override
+    protected void onCreate(final Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        if (redirectIfNeeded()) {
+            return;
+        }
+
+        setContentView(R.layout.permission_check_activity);
+        UiUtils.setStatusBarColor(this, getColor(R.color.permission_check_activity_background));
+
+        findViewById(R.id.exit).setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(final View view) {
+                finish();
+            }
+        });
+
+        mNextView = (TextView) findViewById(R.id.next);
+        mNextView.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(final View view) {
+                tryRequestPermission();
+            }
+        });
+
+        mSettingsView = (TextView) findViewById(R.id.settings);
+        mSettingsView.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(final View view) {
+                final Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
+                        Uri.parse(PACKAGE_URI_PREFIX + getPackageName()));
+                startActivity(intent);
+            }
+        });
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+
+        if (redirectIfNeeded()) {
+            return;
+        }
+    }
+
+    private void tryRequestPermission() {
+        final String[] missingPermissions = OsUtil.getMissingRequiredPermissions();
+        if (missingPermissions.length == 0) {
+            redirect();
+            return;
+        }
+
+        mRequestTimeMillis = SystemClock.elapsedRealtime();
+        requestPermissions(missingPermissions, REQUIRED_PERMISSIONS_REQUEST_CODE);
+    }
+
+    @Override
+    public void onRequestPermissionsResult(
+            final int requestCode, final String permissions[], final int[] grantResults) {
+        if (requestCode == REQUIRED_PERMISSIONS_REQUEST_CODE) {
+            // We do not use grantResults as some of the granted permissions might have been
+            // revoked while the permissions dialog box was being shown for the missing permissions.
+            if (OsUtil.hasRequiredPermissions()) {
+                Factory.get().onRequiredPermissionsAcquired();
+                redirect();
+            } else {
+                final long currentTimeMillis = SystemClock.elapsedRealtime();
+                // If the permission request completes very quickly, it must be because the system
+                // automatically denied. This can happen if the user had previously denied it
+                // and checked the "Never ask again" check box.
+                if ((currentTimeMillis - mRequestTimeMillis) < AUTOMATED_RESULT_THRESHOLD_MILLLIS) {
+                    mNextView.setVisibility(View.GONE);
+
+                    mSettingsView.setVisibility(View.VISIBLE);
+                    findViewById(R.id.enable_permission_procedure).setVisibility(View.VISIBLE);
+                }
+            }
+        }
+    }
+
+    /** Returns true if the redirecting was performed */
+    private boolean redirectIfNeeded() {
+        if (!OsUtil.hasRequiredPermissions()) {
+            return false;
+        }
+
+        redirect();
+        return true;
+    }
+
+    private void redirect() {
+        UIIntents.get().launchConversationListActivity(this);
+        finish();
+    }
+}