Question

这个类有三个按钮添加表，添加椅子和重置添加表将添加tablein第二个布局添加椅子将在第二个布局添加椅子图像。两个按钮工作，但我想移动椅子和表（imageView）在屏幕上。

MainActivity.java

public class MainActivity extends AppCompatActivity {

    private ArrayList<String> mSelecetdItems = new ArrayList<>();
    public static final String SELECETD_ITEMS = "SELECETD_ITEMS";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public  void addtable(View v){
        this.mSelecetdItems.add("table");
        showSecondActivity();
    }
    public  void addchair(View v){
        this.mSelecetdItems.add("chair");
        showSecondActivity();
    }

    private void showSecondActivity() {
        Intent i = new Intent(this,Second.class);
        i.putStringArrayListExtra(SELECETD_ITEMS,this.mSelecetdItems);
        startActivity(i);
    }

    @Override
    public void onSaveInstanceState(Bundle savedInstanceState) {
        super.onSaveInstanceState(savedInstanceState);
        savedInstanceState.putStringArrayList(SELECETD_ITEMS , mSelecetdItems);
    }

    @Override
    public void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        this.mSelecetdItems = savedInstanceState.getStringArrayList(SELECETD_ITEMS);
    }
}

这个类有三个按钮添加表，添加椅子和重置添加表将添加tablein第二个布局添加椅子将添加椅子图像在第二个布局。我想在布局图像中移动桌椅。

Second.java

public class Second extends AppCompatActivity {

    ImageView iv;
    ImageView iv2;
    private int xDelta;
    private int yDelta;
    LinearLayoutCompat hall;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
        Toolbar toolbar = (Toolbar) findViewById(R.id.second_toolbar);
        setSupportActionBar(toolbar);
        ActionBar ab = getSupportActionBar();
        ab.setDisplayHomeAsUpEnabled(true);

        hall = (LinearLayoutCompat) findViewById(R.id.hall_layout);
        Intent i = getIntent();

        ArrayList<String> selecetdItems = i.getStringArrayListExtra(MainActivity.SELECETD_ITEMS);
        for (String selecetdItem : selecetdItems) {
            if (selecetdItem.equals("table")) {
                addImageView(R.drawable.table, hall);
            } else if (selecetdItem.equals("chair")) {
                addImageView2(R.drawable.chair2, hall);
            }
        }
    }

    private void addImageView(int imageRes, LinearLayoutCompat hall) {
       iv = new ImageView(this);
        iv.setImageResource(imageRes);
        iv.setLayoutParams(new android.view.ViewGroup.LayoutParams(250, 250));
        iv.setMaxHeight(180);
        iv.setMaxWidth(120);
        iv.setPadding(15,15,0,0);
        hall.addView(iv);
    }

    private void addImageView2(int imageRes, LinearLayoutCompat hall) {
         iv2 = new ImageView(this);
        iv2.setImageResource(imageRes);
        iv2.setLayoutParams(new android.view.ViewGroup.LayoutParams(150, 150));
        iv2.setMaxHeight(30);
        iv2.setMaxWidth(30);

        iv2.setPadding(25,0,0,0);
        hall.addView(iv2);
    }
}

activity_main.xml此布局文件在Root中有ConstraintLayout。

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.andiroot.restaurantbook.MainActivity">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:minHeight="?attr/actionBarSize"
        android:background="#ff1e8622"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
      >
    </android.support.v7.widget.Toolbar>

    <RelativeLayout
        android:layout_width="368dp"
        android:layout_height="495dp"
        tools:layout_editor_absoluteX="8dp"
        tools:layout_editor_absoluteY="64dp">

        <Button
            android:id="@+id/btn_addtbl"
            style="@style/Widget.AppCompat.Button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="76dp"
            android:text="Add Table"
            android:onClick="addtable"/>

        <Button
            android:id="@+id/btn_addchairs"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="addchair"
            android:layout_marginTop="27dp"
            android:text="Add Chair"
            android:layout_below="@+id/btn_addtbl"
            android:layout_alignEnd="@+id/btn_addtbl" />

        <Button
            android:id="@+id/btn_reset"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignEnd="@+id/btn_addchairs"
            android:layout_below="@+id/btn_addchairs"
            android:layout_marginTop="51dp"
            android:text="Reset" />
    </RelativeLayout>



</android.support.constraint.ConstraintLayout>

activity_second.xml此布局文件在Root

中有LinearLayoutCompat

<?xml version="1.0" encoding="utf-8"?>

<android.support.v7.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/hall_layout"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.andiroot.restaurantbook.Second">

    <android.support.v7.widget.Toolbar
        android:id="@+id/second_toolbar"
        android:minHeight="?attr/actionBarSize"
        android:background="#ff1e8622"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">



    </android.support.v7.widget.Toolbar>
<!--
    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/hall_layout2">
    </RelativeLayout>
-->
</android.support.v7.widget.LinearLayoutCompat>


</pre>

Answer 1

试试这个

    ImageView dishaIMG;
    RelativeLayout cropperLayout;
    float dX, dY;
    float windowWidth, windowHeight;

    DisplayMetrics displayMetrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
    windowHeight = displayMetrics.heightPixels;
    windowWidth = displayMetrics.widthPixels;

    cropperLayout = (RelativeLayout) findViewById(R.id.activity_main2);

    dishaIMG = (ImageView) findViewById(R.id.img_disha);


        dishaIMG.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent motionEvent) {

            int width = dishaIMG.getLayoutParams().width;
            int height = dishaIMG.getLayoutParams().height;

            switch (motionEvent.getAction()) {

                case MotionEvent.ACTION_DOWN:

                    dX = v.getX() - motionEvent.getRawX();
                    dY = v.getY() - motionEvent.getRawY();

                    case MotionEvent.ACTION_MOVE:

                    if (width == windowWidth && height == windowHeight) {


                    } else {
                        v.animate()
                                .x(motionEvent.getRawX() + dX)
                                .y(motionEvent.getRawY() + dY)
                                .setDuration(0)
                                .start();

                        if (motionEvent.getRawX() + dX + width > windowWidth) {
                            v.animate()
                                    .x(windowWidth - width)
                                    .setDuration(0)
                                    .start();
                        }
                        if (motionEvent.getRawX() + dX < 0) {
                            v.animate()
                                    .x(0)
                                    .setDuration(0)
                                    .start();
                        }
                        if (motionEvent.getRawY() + dY + height > windowHeight) {
                            v.animate()
                                    .y(windowHeight - height)
                                    .setDuration(0)
                                    .start();
                        }
                        if (motionEvent.getRawY() + dY < 0) {
                            v.animate()
                                    .y(0)
                                    .setDuration(0)
                                    .start();
                        }

                    }
            }
            return true;
        }
    });

如何在触摸事件android上添加移动图像？

1 个答案: