android - 画面上の任意の場所をタッチしたときにダイアログを表示するにはどうすればよいですか？

Question

ディスプレイのどこにでもタッチしたときにダイアログが表示されるようにしたい。アクティビティ、ビュー、レンダラークラスがあります。私はViewクラスでコードを書きました：

public boolean onTouchEvent(final MotionEvent event) {
        queueEvent(new Runnable() {....}}

コードを投稿しました。（アクティビティと表示のみ）

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();
    }
}

そして私のViewクラス：

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;
    }
 }

私の問題はメソッドstartDialog（）です。それは動作しません。エラーが発生します：

"The constructor AlertDialog.Builder(new Runnable(){}) is undefined"

どうすれば解決できますか？

わかりました、コードをもう一度投稿します：

>>

パブリッククラスMapEditorActivityはActivity{を拡張します

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;
}

}

score 0 · Accepted Answer

交換

    AlertDialog.Builder builder = new AlertDialog.Builder(this);

と

    AlertDialog.Builder builder = new AlertDialog.Builder(getBaseContext());

そしてあなたの問題は解決されます。

score 0 · Accepted Answer

コード行の下に書く

builder.show();

それ以外の

AlertDialog alert = builder.create();

それはあなたの問題を解決します。

score 0 · Accepted Answer

交換

AlertDialog.Builder builder = new AlertDialog.Builder(this);

と

AlertDialog.Builder builder = new AlertDialog.Builder(MapEditorView.this.getContext());

score 0 · Accepted Answer

わかりました、コードを変更しました。これは最後のバージョンですが、同じ問題を抱えています。public class MapEditorActivity extends Activity 実装 OnTouchListener{

private GLSurfaceView mGLSurfaceView;

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;
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);
    mGLSurfaceView.setOnTouchListener(MapEditorActivity.this);



}

private void showDialog(){

    AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
    final String[] color = { "#F5F6F6", "#FFC0CB", "#FF0000", 
            "#C00000","#62492F","#DB3C00", "#98E01C" };
    dialogBuilder.setTitle("pick one Color");
    dialogBuilder.setItems(color, new DialogInterface.OnClickListener() {

        public void onClick(DialogInterface dialog, int which) {

            Toast.makeText(getApplicationContext(),color[which], Toast.LENGTH_SHORT).show();
        }
    });
    AlertDialog alertDialog = dialogBuilder.create();
    alertDialog.show();
}
@Override
protected void onPause() {
    super.onPause();
    mGLSurfaceView.onPause();
}

@Override
protected void onResume() {
    super.onResume();
    mGLSurfaceView.onResume();
}

public boolean onTouch(View v, MotionEvent event) {

    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);

        showDialog();
        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;
    }
    return false;
}

private int getHeight() {
    // TODO Auto-generated method stub
    return 0;
}

private int getWidth() {
    // TODO Auto-generated method stub
    return 0;
}

}

android - 画面上の任意の場所をタッチしたときにダイアログを表示するにはどうすればよいですか？

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