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我現在有一個問題，正在繪製圓形和處理觸摸事件。基本上我正在聆聽觸摸事件，它選擇一個圓圈並讓用戶拖動來控制圓圈的位置/半徑。我也有一個菜單選項來「添加一個新的圈子」，它改變了拖動事件，以添加一個新的圈子來查看。當我測試它時，這會繼續拋出一個力量。我不知道如何看看是什麼導致了力量關閉（抱歉，我是一個剛好擅長破解事情並使其工作的新手）。有人可以看看這個，或者指出我正確調試這個方向嗎？Android：圓形圖形和觸摸事件錯誤
我認爲這可能與在當前焦點的視圖內創建的新圓形有關？如果那有意義的話。
這是我的代碼...初始值來自以前的活動（這不是問題所在，但問題出在我的TouchEventListener中）。
/*this is the working example of playing audio
* and adjusting the volume, although playback
* is a bit choppy and the different sounds loose
* sync after a bit
*/
package com.adam.PlaySound;
import java.util.ArrayList;
import java.util.Collections;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.AbsoluteLayout;
import android.widget.TextView;
@SuppressWarnings("deprecation")
public class EditInterface extends Activity {
/** Called when the activity is first created. */
/*do our web stuff*/
ConnectToUrl makeConnection = new ConnectToUrl();
TextView text;
AbsoluteLayout circlesView;
int numPlayers;
ArrayList<Float> regionX = new ArrayList<Float>();
ArrayList<Float> regionY = new ArrayList<Float>();
ArrayList<Float> regionR = new ArrayList<Float>();
ArrayList<String> soundFiles = new ArrayList<String>();
ArrayList<LoopRegion> region = new ArrayList<LoopRegion>();
ArrayList<LoopRegion> border = new ArrayList<LoopRegion>();
MediaPlayer mediaPlayer = new MediaPlayer();
String key;
int index;
int actionState = 0;
//We can be in one of these 3 states
static final int NONE = 0;
static final int DRAG = 1;
static final int ZOOM = 2;
int mode = NONE;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.edit);
text = (TextView) findViewById(R.id.text);
text.setText("");
circlesView = (AbsoluteLayout) findViewById(R.id.absoluteLayout1);
circlesView.setOnTouchListener(Motion);
Bundle extras = getIntent().getExtras();
if(extras != null) {
numPlayers = extras.getInt("numPlayers");
}
for (int i = 0; i < numPlayers; i++){
//get regionX values
key = "regionX" + i;
regionX.add(extras.getFloat(key));
//get regionY values
key = "regionY" + i;
regionY.add(extras.getFloat(key));
//get regionR values
key = "regionR" + i;
regionR.add(extras.getFloat(key));
//get soundFiles values
key = "soundFiles" + i;
soundFiles.add(extras.getString(key));
//add our circles
region.add(new LoopRegion(this,regionX.get(i),regionY.get(i),regionR.get(i), true, Color.WHITE));
border.add(new LoopRegion(this,regionX.get(i),regionY.get(i),regionR.get(i), false, Color.RED));
circlesView.addView(region.get(i));
circlesView.addView(border.get(i));
}
}
OnTouchListener Motion
= new AbsoluteLayout.OnTouchListener(){
@Override
public boolean onTouch(View v, MotionEvent ev) {
float x1 = ev.getX(0);
float y1 = ev.getY(0);
float x2 = ev.getX(1);
float y2 = ev.getY(1);
final int action = ev.getAction();
switch (action & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
if (actionState == 0){
/***select our circle***/
mode = DRAG;
//for testing//text.setText("action down");
//calculate distance to detect which circle we will look at
ArrayList<Float> distance = new ArrayList<Float>();
for (int i = 0; i < numPlayers; i++){
if (distance(regionX.get(i), regionY.get(i), x1, y1) > (regionR.get(i) + 5)){
distance.add((float) 10000);
}
else {
distance.add(distance(regionX.get(i), regionY.get(i), x1, y1));
}
}
Object object = Collections.min(distance);
index = distance.indexOf(object);
//for testing//text.setText("index: " + index);
//set up sound
String path = "http://soundclusters.adamlaskowitz.com/uploads/" + soundFiles.get(index);
mediaPlayer = MediaPlayer.create(EditInterface.this, Uri.parse(path));
mediaPlayer.start();
region.get(index).setColor(true, Color.RED);
region.get(index).invalidate();
border.get(index).setColor(false, Color.WHITE);
border.get(index).invalidate();
}
else if (actionState == 1){
region.add(new LoopRegion(EditInterface.this, x1, y1, 50 , true, Color.WHITE));
border.add(new LoopRegion(EditInterface.this, x1, y1, 50, false, Color.RED));
circlesView.addView(region.get(numPlayers));
circlesView.addView(border.get(numPlayers));
circlesView.clearFocus();
/////region.get(index).invalidate();
/////border.get(index).invalidate();
index = numPlayers; //since they are zero-indexed the previous
//amount of Players will equal the index of the new larger array
numPlayers = region.size();
text.setText("length:" + numPlayers + ", state:" + actionState);
//text.setText("index:" + index + ", numPlayers:" + numPlayers + ", length:" + region.size());
}
break;
case MotionEvent.ACTION_POINTER_DOWN:
/***initiate zoom***/
mode = ZOOM;
//for testing//text.setText("action 2 down");
break;
case MotionEvent.ACTION_UP:
/***finish our current edit and deselect circle***/
mode = NONE;
//for testing//text.setText("action up");
//stop and release current sound for region
mediaPlayer.stop();
mediaPlayer.release();
region.get(index).setColor(true, Color.WHITE);
region.get(index).invalidate();
border.get(index).setColor(false, Color.RED);
border.get(index).invalidate();
actionState = 0;
text.setText("index:" + index + ", state:" + actionState);
break;
case MotionEvent.ACTION_POINTER_UP:
/***set mode Drag***/
mode = DRAG;
//for testing//text.setText("action 2 up");
break;
case MotionEvent.ACTION_MOVE:
if (mode == DRAG){
/***Drag the circle based on radius***/
//for testing//text.setText("action move");
region.get(index).setCoordinate(x1, y1, regionR.get(index));
region.get(index).invalidate();
border.get(index).setCoordinate(x1, y1, regionR.get(index));
region.get(index).invalidate();
regionX.set(index, x1);
regionY.set(index, y1);
}
else if (mode == ZOOM) {
/***Zoom and move the circle***/
//for testing//text.setText("action 2 move");
regionR.set(index, distance(x1,y1,x2,y2));
float centerX = midpoint(x1,x2);
float centerY = midpoint(y1,y2);
float radius = regionR.get(index)/2;
region.get(index).setCoordinate(centerX, centerY, radius);
region.get(index).invalidate();
border.get(index).setCoordinate(centerX, centerY, radius);
region.get(index).invalidate();
regionX.set(index, centerX);
regionY.set(index, centerY);
regionR.set(index, radius);
}
break;
}
return true;
}
};
//make our menu---------------------------------------------------------
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.edit_menu, menu);
return true;
}
public float regionXNew[] = new float[numPlayers];
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.play:
//return to the GraphicInterface----------------------------------------
Intent mIntent = new Intent(EditInterface.this, GraphicInterface.class);
String num = Integer.toString(numPlayers);
String xVal = "";
String yVal = "";
String rVal = "";
String files = "";
for (int i = 0; i < numPlayers; i++){
//format values to send to web*/
if (i == (numPlayers - 1)){
xVal = xVal.concat(regionX.get(i) + "");
yVal = yVal.concat(regionY.get(i) + "");
rVal = rVal.concat(regionR.get(i) + "");
files = files.concat(soundFiles.get(i) + "");
}
else {
xVal = xVal.concat(regionX.get(i) + "=");
yVal = yVal.concat(regionY.get(i) + "=");
rVal = rVal.concat(regionR.get(i) + "=");
files = files.concat(soundFiles.get(i) + "=");
}
}
makeConnection.sendToWeb(num, xVal, yVal, rVal, files);
if (getParent() == null) {
setResult(RESULT_OK, mIntent);
} else {
getParent().setResult(RESULT_OK, mIntent);
}
finish();
//return to the GraphicInterface---------------------------------------
return true;
case R.id.help:
return true;
case R.id.add:
actionState = 1;
return true;
default:
return super.onOptionsItemSelected(item);
}
}
//make our menu---------------------------------------------------------
public float distance(float x1, float y1, float x2, float y2){
float dist;
float a = x1 - x2;
float b = y1 - y2;
dist = (float) (Math.pow(a, 2) + Math.pow(b, 2));
dist = (float) Math.sqrt(dist);
return dist;
}
public float midpoint(float axis1, float axis2){
float midpoint;
midpoint = (axis1 + axis2)/2;
return midpoint;
}
}
謝謝你的迴應。