[feature] 通过反射调整间隙

OCH/mogo-och-bus-passenger/src/main/res/layout/bus_p_route_fragment.xml

@@ -115,6 +115,8 @@
                 android:ellipsize="marquee"
                 android:marqueeRepeatLimit="marquee_forever"
                 android:text="----"
+                app:customGap="0.5"
+                app:useCustomGap="true"
                 android:textColor="@color/bus_p_line_name_color"
                 android:textSize="@dimen/bus_p_driver_number_plate_size"
                 android:textStyle="bold"

OCH/mogo-och-bus-passenger/src/main/res/layout/bus_p_stations_common_item.xml

@@ -18,6 +18,8 @@
         android:layout_marginRight="@dimen/dp_60"
         android:textColor="@color/bus_p_station_txt_color"
         android:layout_marginLeft="@dimen/dp_90"
+        app:customGap="0.5"
+        app:useCustomGap="true"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toLeftOf="@+id/bus_p_tag"
         app:layout_constraintTop_toBottomOf="@+id/bus_p_cur_arrow_bg"/>

OCH/mogo-och-common-module/src/main/java/com/mogo/och/common/module/utils/FieldUtils.java

@@ -0,0 +1,37 @@
+package com.mogo.och.common.module.utils;
+
+import android.text.TextUtils;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Member;
+import java.lang.reflect.Modifier;
+
+public class FieldUtils {
+
+    public static Field getDeclaredField(final Class<?> cls, final String fieldName, final
+    boolean forceAccess) {
+        if (cls == null || TextUtils.isEmpty(fieldName)) {
+            return null;
+        }
+        try {
+            // only consider the specified class by using getDeclaredField()
+            final Field field = cls.getDeclaredField(fieldName);
+            if (!isAccessible(field)) {
+                if (forceAccess) {
+                    field.setAccessible(true);
+                } else {
+                    return null;
+                }
+            }
+            return field;
+        } catch (final Exception e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+
+    private static boolean isAccessible(final Member m) {
+        return m != null && Modifier.isPublic(m.getModifiers()) && !m.isSynthetic();
+    }
+}

OCH/mogo-och-common-module/src/main/java/com/mogo/och/common/module/wigets/MarqueeTextView.java

@@ -1,12 +1,31 @@
 package com.mogo.och.common.module.wigets;
 
 import android.content.Context;
+import android.content.res.TypedArray;
 import android.util.AttributeSet;
 import android.view.ViewDebug;
+import android.widget.TextView;
+
+import com.mogo.och.common.module.R;
+import com.mogo.och.common.module.utils.FieldUtils;
+
+import java.lang.reflect.Field;
 
 
 public class MarqueeTextView extends androidx.appcompat.widget.AppCompatTextView{
 
+    /**
+     * 上一次设置的时间，用于过滤多余操作
+     */
+    private long mLastSetTime;
+    /**
+     * 自定义 gap
+     */
+    private float mCustomGap = 0.3f;
+    /**
+     * 是否使用自定义 gap
+     */
+    private boolean mUseCustomGap;
 
     public MarqueeTextView(Context context) {
         this(context, null);
@@ -18,6 +37,11 @@ public class MarqueeTextView extends androidx.appcompat.widget.AppCompatTextView
 
     public MarqueeTextView(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
+
+        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.MarqueeTextView);
+        mCustomGap = typedArray.getFloat(R.styleable.MarqueeTextView_customGap, mCustomGap);
+        mUseCustomGap = typedArray.getBoolean(R.styleable.MarqueeTextView_useCustomGap, false);
+        typedArray.recycle();
     }
 
     @Override
@@ -32,4 +56,74 @@ public class MarqueeTextView extends androidx.appcompat.widget.AppCompatTextView
         return true;
     }
 
+    @Override
+    public void invalidate() {
+        reflectToChangeGap();
+
+        super.invalidate();
+    }
+
+    private void reflectToChangeGap() {
+        if (!mUseCustomGap) {
+            return;
+        }
+        if (System.currentTimeMillis() - mLastSetTime < 1000) {
+            // 1s 内不重新设置，过滤多余操作
+            return;
+        }
+        try {
+            Class marqueClass = null;
+            Class[] innerClazz = TextView.class.getDeclaredClasses();
+            for (Class clazz : innerClazz) {
+                if ("Marquee".equals(clazz.getSimpleName())) {
+                    marqueClass = clazz;
+                }
+            }
+
+            if (marqueClass == null) {
+                return;
+            }
+
+            Field field1 = FieldUtils.getDeclaredField(marqueClass, "mGhostStart", true);
+
+            if (field1 == null) {
+                return;
+            }
+
+            final int textWidth = getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight();
+            final float lineWidth = getLayout().getLineWidth(0);
+            final float gap = mCustomGap*textWidth;
+            float ghostStart = lineWidth - textWidth + gap;
+            float maxScroll = ghostStart + textWidth;
+            float ghostOffset = lineWidth + gap;
+            float maxFadeScroll = ghostStart + lineWidth + lineWidth;
+
+            final Field field = FieldUtils.getDeclaredField(TextView.class, "mMarquee", true);
+            if (field != null) {
+                Object mMarque = field.get(this);
+                if (mMarque != null) {
+                    mLastSetTime = System.currentTimeMillis();
+                    float mGhostStart = (float) field1.get(mMarque);
+                    if (mGhostStart != ghostStart) {
+                        // 需要设置的 mGhostStart 与当前 ghostStart 不相等时才去设置
+                        Field field2 = FieldUtils.getDeclaredField(marqueClass, "mMaxScroll", true);
+                        Field field3 = FieldUtils.getDeclaredField(marqueClass, "mGhostOffset", true);
+                        Field field4 = FieldUtils.getDeclaredField(marqueClass, "mMaxFadeScroll", true);
+
+                        if (field2 == null || field3 == null || field4 == null) {
+                            return;
+                        }
+
+                        field1.set(mMarque, ghostStart);
+                        field2.set(mMarque, maxScroll);
+                        field3.set(mMarque, ghostOffset);
+                        field4.set(mMarque, maxFadeScroll);
+                    }
+                }
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
 }

OCH/mogo-och-common-module/src/main/res/values/attrs.xml

@@ -52,4 +52,9 @@
         <attr name="och_realtime_end_color" format="color" />
         <attr name="och_realtime_radius" format="dimension" />
     </declare-styleable>
+
+    <declare-styleable name="MarqueeTextView">
+        <attr name="customGap" format="float" />
+        <attr name="useCustomGap" format="boolean"/>
+    </declare-styleable>
 </resources>