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我想让我的对话框可见，当我触摸显示器上的任何地方。 我有一个Activity，一个视图和一个Renderer类。我在View类中编写代码：如何在触摸屏幕上的任何位置时使对话框可见？
public boolean onTouchEvent(final MotionEvent event) {
queueEvent(new Runnable() {....}}
我发布了我的代码。 （仅限活动和View）
public class MapEditorActivity extends Activity {
private GLSurfaceView mGLSurfaceView;
Region dialogRegion;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
// Create our Preview view and set it as the content of our
// Activity
mGLSurfaceView = new MapEditorView(this);
setContentView(mGLSurfaceView);
}
@Override
protected void onPause() {
super.onPause();
mGLSurfaceView.onPause();
}
@Override
protected void onResume() {
super.onResume();
mGLSurfaceView.onResume();
}
}
我的视图类：
public class MapEditorView extends GLSurfaceView {
private static final String LOG_TAG = "de.rwth.arlab.colofields.ui.MapEditorView";
MapEditorRenderer editMapRenderer;
// we have a maximum of 5 pointer
private int[] coordsX = new int[5];
private int[] coordsY = new int[5];
// we have to save first touch for motion
private int[] coordsXFirst = new int[5];
private int[] coordsYFirst = new int[5];
// offsets for view
private float offX;
private float offY;
private float offZ;
Context context;
boolean zooming;
public MapEditorView(Context context) {
super(context);
editMapRenderer = new MapEditorRenderer(context);
setRenderer(editMapRenderer);
// initialize as not present
Arrays.fill(coordsX, Integer.MIN_VALUE);
Arrays.fill(coordsY, Integer.MIN_VALUE);
zooming = false;
}
public boolean onTouchEvent(final MotionEvent event) {
queueEvent(new Runnable() {
// TODO: Speak about this thing, this functions need API8
@SuppressLint("NewApi")
public void run() {
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
offX = editMapRenderer.getxView();
offY = editMapRenderer.getyView();
coordsXFirst[0] = (int) event.getX(0);
coordsYFirst[0] = (int) event.getY(0);
startDialog(null);
break;
case MotionEvent.ACTION_POINTER_DOWN:
offZ = editMapRenderer.getzView();
coordsXFirst[0] = (int) event.getX(0);
coordsYFirst[0] = (int) event.getY(0);
coordsXFirst[1] = (int) event.getX(1);
coordsYFirst[1] = (int) event.getY(1);
zooming=true;
break;
case MotionEvent.ACTION_UP:
zooming=false;
break;
default:
// track all touches
for (int i = 0; i < event.getPointerCount(); i++) {
int id = event.getPointerId(i);
// update all other pointer positions
coordsX[id] = (int) event.getX(i);
coordsY[id] = (int) event.getY(i);
}
// When only one finger
if (event.getPointerCount() == 1 && !zooming)
editMapRenderer.setPosition(offX
+ (coordsX[0] - coordsXFirst[0])*editMapRenderer.getzView()*-1/1000.0f, offY
+ (coordsYFirst[0] - coordsY[0])*editMapRenderer.getzView()*-1/1000.0f);
// When two fingers
float distanceOld = (float) FloatMath
.sqrt((coordsXFirst[1] - coordsXFirst[0])
* (coordsXFirst[1] - coordsXFirst[0])
+ (coordsYFirst[1] - coordsYFirst[0])
* (coordsYFirst[1] - coordsYFirst[0]));
float distanceNew = (float) FloatMath
.sqrt((coordsX[1] - coordsX[0])
* (coordsX[1] - coordsX[0])
+ (coordsY[1] - coordsY[0])
* (coordsY[1] - coordsY[0]));
float distanceMax = (float) FloatMath
.sqrt(getWidth()
* getWidth()
+ getHeight()
* getHeight());
if (event.getPointerCount() == 2) {
editMapRenderer.setZoom(offZ + (distanceNew
- distanceOld)/(distanceMax/10));
}
break;
}
}
public Dialog startDialog(Bundle savedInstanceState) {
final CharSequence[] items = new String[] { "#F5F6F6", "#FFC0CB", "#FF0000",
"#C00000","#62492F","#DB3C00", "#98E01C" };
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Pick a color");
builder.setItems(items, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
Toast.makeText((Context) getApplicationWindowToken(), items[item], Toast.LENGTH_SHORT).show();
}
});
AlertDialog alert = builder.create();
}
});
return true;
}
MapEditorRenderer mRenderer;
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater =((Activity)context).getMenuInflater();
inflater.inflate(R.layout.menu_save, menu);
return true;
}
}
我的问题是方法startDialog（）。 它不起作用。我收到一个错误：
"The constructor AlertDialog.Builder(new Runnable(){}) is undefined"
我该如何解决它？
好吧，我再次发布我的代码：
>
公共类MapEditorActivity延伸活动{
private GLSurfaceView mGLSurfaceView;
Region dialogRegion;
MapEditorRenderer editMapRenderer;
// we have a maximum of 5 pointer
private int[] coordsX = new int[5];
private int[] coordsY = new int[5];
// we have to save first touch for motion
private int[] coordsXFirst = new int[5];
private int[] coordsYFirst = new int[5];
// offsets for view
private float offX;
private float offY;
private float offZ;
Context context;
boolean zooming;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
// Create our Preview view and set it as the content of our
// Activity
mGLSurfaceView = new MapEditorView(this);
setContentView(mGLSurfaceView);
mGLSurfaceView.setOnTouchListener(MapEditorActivity.this);
}
@Override
protected void onPause() {
super.onPause();
mGLSurfaceView.onPause();
}
@Override
protected void onResume() {
super.onResume();
mGLSurfaceView.onResume();
}
public boolean onTouchEvent(final MotionEvent event) {
queueEvent(new Runnable() {
// TODO: Speak about this thing, this functions need API8
@SuppressLint("NewApi")
public void run() {
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
offX = editMapRenderer.getxView();
offY = editMapRenderer.getyView();
coordsXFirst[0] = (int) event.getX(0);
coordsYFirst[0] = (int) event.getY(0);
startDialog(null);
break;
case MotionEvent.ACTION_POINTER_DOWN:
offZ = editMapRenderer.getzView();
coordsXFirst[0] = (int) event.getX(0);
coordsYFirst[0] = (int) event.getY(0);
coordsXFirst[1] = (int) event.getX(1);
coordsYFirst[1] = (int) event.getY(1);
zooming=true;
break;
case MotionEvent.ACTION_UP:
zooming=false;
break;
default:
// track all touches
for (int i = 0; i < event.getPointerCount(); i++) {
int id = event.getPointerId(i);
// update all other pointer positions
coordsX[id] = (int) event.getX(i);
coordsY[id] = (int) event.getY(i);
}
// When only one finger
if (event.getPointerCount() == 1 && !zooming)
editMapRenderer.setPosition(offX
+ (coordsX[0] - coordsXFirst[0])*editMapRenderer.getzView()*-1/1000.0f, offY
+ (coordsYFirst[0] - coordsY[0])*editMapRenderer.getzView()*-1/1000.0f);
// When two fingers
float distanceOld = (float) FloatMath
.sqrt((coordsXFirst[1] - coordsXFirst[0])
* (coordsXFirst[1] - coordsXFirst[0])
+ (coordsYFirst[1] - coordsYFirst[0])
* (coordsYFirst[1] - coordsYFirst[0]));
float distanceNew = (float) FloatMath
.sqrt((coordsX[1] - coordsX[0])
* (coordsX[1] - coordsX[0])
+ (coordsY[1] - coordsY[0])
* (coordsY[1] - coordsY[0]));
float distanceMax = (float) FloatMath
.sqrt(getWidth()
* getWidth()
+ getHeight()
* getHeight());
if (event.getPointerCount() == 2) {
editMapRenderer.setZoom(offZ + (distanceNew
- distanceOld)/(distanceMax/10));
}
break;
}
}
private int getHeight() {
// TODO Auto-generated method stub
return 0;
}
private int getWidth() {
// TODO Auto-generated method stub
return 0;
}
public Dialog startDialog(Bundle savedInstanceState) {
final CharSequence[] items = new String[] { "#F5F6F6", "#FFC0CB", "#FF0000",
"#C00000","#62492F","#DB3C00", "#98E01C" };
AlertDialog.Builder builder = new AlertDialog.Builder(MapEditorActivity.this);
builder.setTitle("Pick a color");
builder.setItems(items, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
Toast.makeText((Context) getApplication(), items[item], Toast.LENGTH_SHORT).show();
}
});
AlertDialog alert = builder.create();
return alert;
}
});
return true;
}
private void queueEvent(Runnable runnable) {
// TODO Auto-generated method stub
}
MapEditorRenderer mRenderer;
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater =((Activity)context).getMenuInflater();
inflater.inflate(R.layout.menu_save, menu);
return true;
}
}
但现在我有这个Errir 构造AlertDialog.Builder（MapEditorView）是未定义 – guguli
试'AlertDialog.Builder建设者=新AlertDialog.Builder（ getContext（））;' –
我编辑了我的answer.please检查。 getBaseContext（）肯定会起作用。 –