使用GestureDetector优化触控处理

app/src/main/java/com/yutou/nas_music_player/views/MainActivity.java

@@ -9,6 +9,7 @@ import android.support.v4.media.MediaMetadataCompat;
 import android.support.v4.media.session.MediaControllerCompat;
 import android.support.v4.media.session.MediaSessionCompat;
 import android.support.v4.media.session.PlaybackStateCompat;
+import android.view.GestureDetector;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.View;
@@ -22,6 +23,7 @@ import android.widget.Toast;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.app.ActivityOptionsCompat;
 import androidx.core.util.Pair;
+import androidx.core.view.GestureDetectorCompat;
 
 import com.alibaba.fastjson.JSON;
 import com.bumptech.glide.Glide;
@@ -52,6 +54,9 @@ public class MainActivity extends AppCompatActivity {
     private TextView positionTime, durationTime, bitRate, playIndex;
     private SeekBar seekBar;
     private Handler handler;
+
+    private GestureDetectorCompat touch;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
@@ -131,51 +136,13 @@ public class MainActivity extends AppCompatActivity {
             public void onClick(View v) {
                 int model = (int) playModel.getTag();
                 if (model == MusicContainer.PLAY_MODEL_LIST_RANDOM) {
-                    setPlayModelButton(MusicContainer.PLAY_MODEL_RANDOM,true);
+                    setPlayModelButton(MusicContainer.PLAY_MODEL_RANDOM, true);
                     return;
                 }
-                setPlayModelButton(model + 1,true);
+                setPlayModelButton(model + 1, true);
             }
         });
-        getWindow().getDecorView().setOnTouchListener(new View.OnTouchListener() {
-            float downPosition_x = 0, downPosition_y = 0;
 
-            @Override
-            public boolean onTouch(View v, MotionEvent event) {
-                if (event.getAction() == MotionEvent.ACTION_DOWN) {
-                    downPosition_x = event.getRawX();
-                    downPosition_y = event.getRawY();
-                } else if (event.getAction() == MotionEvent.ACTION_UP) {
-                    if (Math.abs(downPosition_x - event.getRawX()) < 500 && downPosition_y - event.getRawY() > 500) {
-                        Pair<View, String> pImage = Pair.create((View) album_image, "main_album_image");
-                        Pair<View, String> pPrevious = Pair.create((View) previous, "previous");
-                        Pair<View, String> pPlay = Pair.create((View) play, "play");
-                        Pair<View, String> pNext = Pair.create((View) next, "next");
-                        Pair<View, String> pTitle = Pair.create((View) title, "title");
-                        Pair<View, String> pArtist = Pair.create((View) artist, "artist");
-                        Pair<View, String> pBar = Pair.create((View) seekBar, "bar");
-                        Bundle bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(MainActivity.this,
-                                pImage,
-                                pPrevious,
-                                pPlay,
-                                pNext,
-                                pBar,
-                                pTitle,
-                                pArtist).toBundle();
-
-                        Intent intent = new Intent(
-                                MainActivity.this, PlayLibsActivity.class);
-                        intent.putExtra("bar_pos", seekBar.getProgress());
-                        if (bundle != null) {
-                            startActivity(intent, bundle);
-                        } else {
-                            startActivity(intent);
-                        }
-                    }
-                }
-                return false;
-            }
-        });
         browserHelper = new MediaBrowserHelper(this);
         browserHelper.regPlayListener(new PlayListener());
 
@@ -271,7 +238,7 @@ public class MainActivity extends AppCompatActivity {
                     AppTools.toast("列表随机");
                 break;
             default:
-                setPlayModelButton(MusicContainer.PLAY_MODEL_RANDOM,isButton);
+                setPlayModelButton(MusicContainer.PLAY_MODEL_RANDOM, isButton);
                 return;
         }
         ConfigTools.getPreferences().edit().putInt("playModel", model).apply();
@@ -302,6 +269,7 @@ public class MainActivity extends AppCompatActivity {
         seekBar = findViewById(R.id.seekBar);
         playModel = findViewById(R.id.playModel);
         playIndex = findViewById(R.id.playIndex);
+        touch = new GestureDetectorCompat(this, new MyTouch());
         int model = ConfigTools.getPreferences().getInt("playModel", MusicContainer.PLAY_MODEL_RANDOM);
         setPlayModelButton(model);
     }
@@ -342,26 +310,35 @@ public class MainActivity extends AppCompatActivity {
         return super.onKeyUp(keyCode, event);
     }
 
-    float downX = 0;
-    float downY = 0;
 
     @Override
     public boolean onTouchEvent(MotionEvent event) {
-        if (event.getAction() == MotionEvent.ACTION_DOWN) {
+        return touch.onTouchEvent(event);
-            downX = event.getRawX();
-            downY = event.getRawY();
-        } else if (event.getAction() == MotionEvent.ACTION_UP) {
-            pass(event.getRawX(), event.getRawY());
-        }
-        return super.onTouchEvent(event);
     }
+    private void toPlayList(){
+        Pair<View, String> pImage = Pair.create((View) album_image, "main_album_image");
+        Pair<View, String> pPrevious = Pair.create((View) previous, "previous");
+        Pair<View, String> pPlay = Pair.create((View) play, "play");
+        Pair<View, String> pNext = Pair.create((View) next, "next");
+        Pair<View, String> pTitle = Pair.create((View) title, "title");
+        Pair<View, String> pArtist = Pair.create((View) artist, "artist");
+        Pair<View, String> pBar = Pair.create((View) seekBar, "bar");
+        Bundle bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(MainActivity.this,
+                pImage,
+                pPrevious,
+                pPlay,
+                pNext,
+                pBar,
+                pTitle,
+                pArtist).toBundle();
 
-    private void pass(float upX, float upY) {
+        Intent intent = new Intent(
-        boolean isOkY = Math.abs(upY - downY) <= 200;
+                MainActivity.this, PlayLibsActivity.class);
-        if (upX - downX > 200 && isOkY) {
+        intent.putExtra("bar_pos", seekBar.getProgress());
-            previous.callOnClick();
+        if (bundle != null) {
-        } else if (upX - downX < -200 && isOkY) {
+            startActivity(intent, bundle);
-            next.callOnClick();
+        } else {
+            startActivity(intent);
         }
     }
 
@@ -413,4 +390,26 @@ public class MainActivity extends AppCompatActivity {
             System.out.println("不知道是啥变换了");
         }
     }
+
+    private class MyTouch extends GestureDetector.SimpleOnGestureListener {
+
+        @Override
+        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
+            float x = e1.getX() - e2.getX();
+            float y = e1.getY() - e2.getY();
+            if (Math.abs(x) < 200 && y > 500) {
+                System.out.println("上");
+            } else if (Math.abs(x) < 200 && y < -500) {
+                toPlayList();
+                System.out.println("下");
+            } else if (Math.abs(y) < 200 && x > 300) {
+                next.callOnClick();
+                System.out.println("右");
+            } else if (Math.abs(y) < 200 && x < -300) {
+                previous.callOnClick();
+                System.out.println("左");
+            }
+            return super.onFling(e1, e2, velocityX, velocityY);
+        }
+    }
 }