如何在触摸事件android上添加移动图像？
这个类有三个按钮添加表格，添加椅子和重置添加表格将添加表格第二个布局添加椅子将在第二个布局添加椅子图像。两个按钮的作品，但我想在屏幕上移动椅子和桌子（ imageView ）。
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格，添加椅子和重置添加表格将添加表格第二个布局添加椅子将在第二个布局添加椅子图像。 我想在布局图像中移动桌子和椅子。
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这个布局文件在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这个布局文件在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>
尝试这个
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;
}
});