build: update minimum SDK version to 21 (5.0 Lollipop)

Change-Id: I75397fb39bd61383810933a91800305cebc298bf

build-daemon.sh

@@ -63,12 +63,11 @@ else
 fi
 
 if [ "${HAVE_64}" = 1 ];then
-    ANDROID_API_VERS=21
     LIBDIR=lib64
 else
-    ANDROID_API_VERS=19
     LIBDIR=lib
 fi
+ANDROID_API_VERS=21
 ANDROID_API=android-$ANDROID_API_VERS
 
 export ANDROID_TOOLCHAIN="`pwd`/android-toolchain-$ANDROID_API_VERS-$PLATFORM_SHORT_ARCH"
@@ -115,12 +114,9 @@ if [ ! -d "$DAEMON_DIR" ]; then
 fi
 
 # Setup LDFLAGS
-if [ ${ANDROID_ABI} = "armeabi-v7a-hard" ] ; then
-    EXTRA_CFLAGS="${EXTRA_CFLAGS} -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16"
-    EXTRA_LDFLAGS="-march=armv7-a -mfpu=vfpv3-d16 -mcpu=cortex-a8 -lm_hard -D_NDK_MATH_NO_SOFTFP=1"
-elif [ ${ANDROID_ABI} = "armeabi-v7a" ] ; then
-    EXTRA_CFLAGS="${EXTRA_CFLAGS} -march=armv7-a -mthumb -mfloat-abi=softfp -mfpu=vfpv3-d16"
-    EXTRA_LDFLAGS="${EXTRA_LDFLAGS} -march=armv7-a -mthumb -mfloat-abi=softfp -mfpu=vfpv3-d16"
+if [ ${ANDROID_ABI} = "armeabi-v7a" ] ; then
+    EXTRA_CFLAGS="${EXTRA_CFLAGS} -march=armv7-a -mthumb"
+    EXTRA_LDFLAGS="${EXTRA_LDFLAGS} -march=armv7-a -mthumb"
 elif [ ${ANDROID_ABI} = "arm64-v8a" ] ; then
     EXTRA_LDFLAGS="${EXTRA_LDFLAGS} -L${ANDROID_TOOLCHAIN}/sysroot/usr/lib -L${ANDROID_TOOLCHAIN}/${TARGET_TUPLE}/lib"
 fi
@@ -168,11 +164,6 @@ mkdir -p contrib/${TARGET_TUPLE}/lib/pkgconfig
 cd $DAEMON_DIR/contrib/native-${TARGET_TUPLE}
 ../bootstrap --host=${TARGET_TUPLE} --disable-libav --enable-ffmpeg --disable-speexdsp
 
-# Some libraries have arm assembly which won't build in thumb mode
-# We append -marm to the CFLAGS of these libs to disable thumb mode
-[ ${ANDROID_ABI} = "armeabi-v7a" ] && echo "NOTHUMB := -marm" >> config.mak
-[ ${ANDROID_ABI} = "armeabi-v7a-hard" ] && echo "NOTHUMB := -marm" >> config.mak
-
 # Always strip symbols for libring.so remove it if you want to debug the daemon
 STRIP_ARG="-s "
 
@@ -264,10 +255,6 @@ STATIC_LIBS_ALL="-llog -lOpenSLES -landroid \
                 -largon2 \
                 -liconv"
 
-if [ ! "${HAVE_64}" = 1 ];then
-    STATIC_LIBS_ALL="${STATIC_LIBS_ALL} -landroid_support"
-fi
-
 LIBRING_JNI_DIR=${ANDROID_APP_DIR}/app/src/main/libs/${ANDROID_ABI}
 
 echo "Building Ring JNI library for Android to ${LIBRING_JNI_DIR}"

ring-android/app/build.gradle

@@ -6,11 +6,10 @@ android {
     compileSdkVersion 28
     buildToolsVersion '28.0.3'
     defaultConfig {
-        minSdkVersion 19
+        minSdkVersion 21
         targetSdkVersion 28
         versionCode 138
         versionName "20181202"
-        vectorDrawables.useSupportLibrary = true
     }
 
     sourceSets {

ring-android/app/src/main/java/cx/ring/application/RingApplication.java

@@ -220,12 +220,8 @@ public abstract class RingApplication extends Application {
     @Override
     public void onCreate() {
         super.onCreate();
-
         sInstance = this;
 
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP)
-            AppCompatDelegate.setCompatVectorFromResourcesEnabled(true);
-
         // building injection dependency tree
         mRingInjectionComponent = DaggerRingInjectionComponent.builder()
                 .ringInjectionModule(new RingInjectionModule(this))

ring-android/app/src/main/java/cx/ring/fragments/ConversationFragment.java

@@ -43,7 +43,6 @@ import android.text.Editable;
 import android.text.TextUtils;
 import android.text.TextWatcher;
 import android.util.Log;
-import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -52,7 +51,6 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.view.inputmethod.EditorInfo;
 import android.widget.Spinner;
-import android.widget.TextView;
 import android.widget.Toast;
 
 import java.io.File;
@@ -90,7 +88,6 @@ import cx.ring.utils.AndroidFileUtils;
 import cx.ring.utils.ClipboardHelper;
 import cx.ring.utils.ContentUriHandler;
 import cx.ring.utils.MediaButtonsHelper;
-import cx.ring.views.MessageEditText;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.disposables.Disposable;