package mobile.android.multi.touch; import android.os.Bundle; import android.app.Activity; import android.util.Log; import android.view.Menu; import android.view.MotionEvent; public class MultiTouchActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_multi_touch); } @Override public boolean onTouchEvent(MotionEvent event) { if (event.getPointerCount() == 2) { if (event.getAction() == MotionEvent.ACTION_MOVE) { int historySize = event.getHistorySize(); if (historySize == 0) return true; float currentY1 = event.getY(0); float currentY2 = event.getY(1); float historyY1 = event.getHistoricalY(0, historySize - 1); float historyY2 = event.getHistoricalY(1, historySize - 1); float distance = Math.abs(currentY1 - currentY2); float historyDistance = Math.abs(historyY1 - historyY2); if (distance > historyDistance) { Log.d("status", "放大" +historySize); } else if (distance < historyDistance) { Log.d("status", "缩小"+historySize); } else { Log.d("status", "移动"+historySize); } } } return true; } }
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