如何在触摸事件android中添加移动图像?
问题描述:
这个类有三个按钮添加表添加椅子和复位加表将新增tablein第二布局添加椅子将增加在第二layout.Both按钮作品椅子的图像,但我想在屏幕上移动的椅子和桌子(immageView)如何在触摸事件android中添加移动图像?
MainActivity.java
public class MainActivity extends AppCompatActivity { private ArrayList 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复位加表将新增tablein第二布局添加椅子将增加椅子图像中第二layout.I要移动的桌子和椅子在布局图像
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 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中这种布局文件有ConstraintLayout根
<?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这种布局文件有LinearLayoutCompat根
<?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>
答
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;
}
});