Fix up audio recording

AUDIO_RECORD is a runtime permission, ask for it.
We're intentionally letting the activity proceed even if the permission
gets denied. People may not want audio.

The app will display an informational warning and a shortcut to the app
permissions when audio is disable so users know why they are not getting
audio, and how to enable it.

CYNGNOS-1695
Change-Id: Ic535fedcd666d929bc5eabe068817eff1275967e

4 files changed, 104 insertions, 2 deletions

diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 03499b2..52cb98b 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -5,7 +5,7 @@
           android:versionName="1.0.0.3">
 
     <uses-sdk
-        android:minSdkVersion="21"
+        android:minSdkVersion="23"
         android:targetSdkVersion="23" />
 
     <uses-permission android:name="android.permission.WAKE_LOCK" />
diff --git a/res/layout/main.xml b/res/layout/main.xml
index 7842d20..7a73579 100644
--- a/res/layout/main.xml
+++ b/res/layout/main.xml
@@ -9,11 +9,22 @@
 
     <TextView
             style="@android:style/TextAppearance.Medium"
+            android:id="@+id/start_description"
             android:gravity="center"
             android:text="@string/start_description"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"/>
 
+    <TextView
+            style="@android:style/TextAppearance.Medium"
+            android:id="@+id/no_audio_warning"
+            android:gravity="center"
+            android:text="@string/no_audio_warning"
+            android:layout_marginTop="10dp"
+            android:visibility="gone"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"/>
+
     <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -22,6 +33,13 @@
             android:orientation="vertical"
             >
         <Button
+                android:id="@+id/settings"
+                android:text="@string/settings"
+                android:visibility="gone"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"/>
+
+        <Button
                 android:id="@+id/start_screencast"
                 android:text="@string/start_screencast"
                 android:layout_width="wrap_content"
@@ -33,6 +51,7 @@
                 android:enabled="false"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"/>
+
     </LinearLayout>
 
 </LinearLayout>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index b9ce154..62b09f6 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -26,4 +26,7 @@
     <string name="not_enough_storage">Not enough storage available</string>
     <string name="start_screencast">Start Screencast</string>
     <string name="start_description">Press \"Start Screencast\" to begin recording a video of your Android screen and microphone.</string>
+    <string name="start_description_no_audio">Press \"Start Screencast\" to begin recording a video of your Android screen.</string>
+    <string name="no_audio_warning">To include audio, go to Settings and enable the microphone permission for this app.</string>
+    <string name="settings">Settings</string>
 </resources>
diff --git a/src/org/cyanogenmod/screencast/MainActivity.java b/src/org/cyanogenmod/screencast/MainActivity.java
index 843b8f9..63f1c68 100644
--- a/src/org/cyanogenmod/screencast/MainActivity.java
+++ b/src/org/cyanogenmod/screencast/MainActivity.java
@@ -16,22 +16,67 @@
 
 package org.cyanogenmod.screencast;
 
+import android.Manifest;
 import android.app.Activity;
 import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.net.Uri;
 import android.os.Bundle;
+import android.provider.Settings;
 import android.view.View;
 import android.widget.Button;
+import android.widget.TextView;
 
 public class MainActivity extends Activity {
 
     Button mStartScreencastButton;
     Button mStopScreencastButton;
+    Button mSettingsButton;
+    TextView mStartDescription;
+    View mNoAudioWarning;
+
+    boolean mHasAudioPermission = false;
+
+    private static final int REQUEST_AUDIO_PERMS = 654;
+
+    private boolean hasPermissions() {
+        int res = checkCallingOrSelfPermission(Manifest.permission.RECORD_AUDIO);
+        return (res == PackageManager.PERMISSION_GRANTED);
+    }
+
+    private void requestNecessaryPermissions() {
+        String[] permissions = new String[] {
+                Manifest.permission.RECORD_AUDIO,
+        };
+        requestPermissions(permissions, REQUEST_AUDIO_PERMS);
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, String[] permissions,
+                                           int[] grantResults) {
+        if (requestCode == REQUEST_AUDIO_PERMS) {
+            mHasAudioPermission = true;
+            for (int res : grantResults) {
+                mHasAudioPermission &= (res == PackageManager.PERMISSION_GRANTED);
+            }
+            refreshState();
+        }
+    }
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
 
+        if (!hasPermissions()) {
+            requestNecessaryPermissions();
+        } else {
+            mHasAudioPermission = true;
+        }
+
+        mStartDescription = (TextView) findViewById(R.id.start_description);
+        mNoAudioWarning = findViewById(R.id.no_audio_warning);
+
         mStartScreencastButton = (Button) findViewById(R.id.start_screencast);
         mStartScreencastButton.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -53,11 +98,20 @@ public class MainActivity extends Activity {
                 refreshState();
             }
         });
+
+        mSettingsButton = (Button) findViewById(R.id.settings);
+        mSettingsButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                goToSettings();
+            }
+        });
     }
 
     @Override
     protected void onResume() {
         super.onResume();
+        mHasAudioPermission = hasPermissions();
         refreshState();
     }
 
@@ -75,5 +129,31 @@ public class MainActivity extends Activity {
         if (mStopScreencastButton != null) {
             mStopScreencastButton.setEnabled(recording);
         }
+
+        int visibility = mHasAudioPermission ? View.GONE : View.VISIBLE;
+        if (mSettingsButton != null) {
+            mSettingsButton.setVisibility(visibility);
+        }
+        if (mNoAudioWarning != null) {
+            mNoAudioWarning.setVisibility(visibility);
+        }
+
+        if (mStartDescription != null) {
+            mStartDescription.setText(
+                mHasAudioPermission
+                    ? R.string.start_description
+                    : R.string.start_description_no_audio
+            );
+        }
+    }
+
+    private void goToSettings() {
+        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
+        intent.addCategory(Intent.CATEGORY_DEFAULT);
+        intent.setData(Uri.parse("package:" + getPackageName()));
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
+        intent.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
+        startActivity(intent);
     }
-}
+}
\ No newline at end of file