Mega Code Archive
Drag and drop
<![CDATA[
package app.test;
import android.animation.ObjectAnimator;
import android.app.Activity;
import android.app.Fragment;
import android.content.ClipData;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.util.AttributeSet;
import android.util.Log;
import android.view.DragEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.CycleInterpolator;
import android.widget.TextView;
class Dot extends View implements View.OnDragListener {
private static final int DEFAULT_RADIUS = 50;
private static final int DEFAULT_COLOR = Color.WHITE;
private static final int SELECTED_COLOR = Color.MAGENTA;
protected static final String DOTTAG = "DragDot";
private Paint mNormalPaint;
private Paint mDraggingPaint;
private int mColor = DEFAULT_COLOR;
private int mRadius = DEFAULT_RADIUS;
private boolean inDrag;
public Dot(Context context, AttributeSet attrs) {
super(context, attrs);
mNormalPaint = new Paint();
mNormalPaint.setColor(mColor);
mNormalPaint.setAntiAlias(true);
mDraggingPaint = new Paint();
mDraggingPaint.setColor(SELECTED_COLOR);
mDraggingPaint.setAntiAlias(true);
setOnLongClickListener(lcListener);
setOnDragListener(this);
}
private static View.OnLongClickListener lcListener = new View.OnLongClickListener() {
private boolean mDragInProgress;
public boolean onLongClick(View v) {
ClipData data = ClipData.newPlainText("DragData",
(String) v.getTag());
mDragInProgress = v.startDrag(data, new View.DragShadowBuilder(v),
(Object) v, 0);
Log.v((String) v.getTag(), "starting drag? " + mDragInProgress);
return true;
}
};
@Override
protected void onMeasure(int widthSpec, int heightSpec) {
int size = 2 * mRadius + getPaddingLeft() + getPaddingRight();
setMeasuredDimension(size, size);
}
public boolean onDrag(View v, DragEvent event) {
String dotTAG = (String) getTag();
if (event.getLocalState() != this) {
return false;
}
boolean result = true;
int action = event.getAction();
float x = event.getX();
float y = event.getY();
switch (action) {
case DragEvent.ACTION_DRAG_STARTED:
inDrag = true;
break;
case DragEvent.ACTION_DRAG_LOCATION:
break;
case DragEvent.ACTION_DRAG_ENTERED:
break;
case DragEvent.ACTION_DRAG_EXITED:
break;
case DragEvent.ACTION_DROP:
result = false;
break;
case DragEvent.ACTION_DRAG_ENDED:
inDrag = false; // change color of original dot back
break;
default:
result = false;
break;
}
return result;
}
public void draw(Canvas canvas) {
float cx = this.getWidth() / 2 + getLeftPaddingOffset();
float cy = this.getHeight() / 2 + getTopPaddingOffset();
Paint paint = mNormalPaint;
if (inDrag)
paint = mDraggingPaint;
canvas.drawCircle(cx, cy, mRadius, paint);
invalidate();
}
}
class DropZone extends Fragment {
private View dropTarget;
private TextView dropMessage;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle icicle) {
View v = inflater.inflate(R.layout.row, container, false);
dropMessage = (TextView) v.findViewById(R.id.dropmessage);
dropTarget = (View) v.findViewById(R.id.droptarget);
dropTarget.setOnDragListener(new View.OnDragListener() {
private static final String DROPTAG = "DropTarget";
private int dropCount = 0;
private ObjectAnimator anim;
public boolean onDrag(View v, DragEvent event) {
int action = event.getAction();
boolean result = true;
switch (action) {
case DragEvent.ACTION_DRAG_STARTED:
break;
case DragEvent.ACTION_DRAG_ENTERED:
anim = ObjectAnimator
.ofFloat((Object) v, "alpha", 1f, 0.5f);
anim.setInterpolator(new CycleInterpolator(40));
anim.setDuration(30 * 1000);
anim.start();
break;
case DragEvent.ACTION_DRAG_EXITED:
if (anim != null) {
anim.end();
anim = null;
}
break;
case DragEvent.ACTION_DRAG_LOCATION:
Log.v(DROPTAG,
"drag proceeding in dropTarget: " + event.getX()
+ ", " + event.getY());
break;
case DragEvent.ACTION_DROP:
Log.v(DROPTAG, "drag drop in dropTarget");
if (anim != null) {
anim.end();
anim = null;
}
ClipData data = event.getClipData();
Log.v(DROPTAG, "Item data is "
+ data.getItemAt(0).getText());
dropCount++;
String message = dropCount + " drop";
if (dropCount > 1)
message += "s";
dropMessage.setText(message);
break;
case DragEvent.ACTION_DRAG_ENDED:
Log.v(DROPTAG, "drag ended in dropTarget");
if (anim != null) {
anim.end();
anim = null;
}
break;
default:
Log.v(DROPTAG, "other action in dropzone: " + action);
result = false;
}
return result;
}
});
return v;
}
}
class Palette extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle icicle) {
View v = inflater.inflate(R.layout.add_edit, container, false);
return v;
}
}
public class Test extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
//layout/main.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- This file is res/layout/main.xml -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment class="app.test.TitlesFragment"
android:id="@+id/titles"
android:layout_width="match_parent"
android:layout_height="match_parent" />
android:background="#00550033" />
<FrameLayout
android:id="@+id/details" android:layout_weight="2"
android:layout_width="0px"
android:layout_height="match_parent" />
</LinearLayout>
//row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<View android:id="@+id/droptarget"
android:layout_width="75dp"
android:layout_height="75dp"
android:layout_gravity="center_vertical"
android:background="#00ff00" />
<TextView android:id="@+id/dropmessage"
android:text="0 drops"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:paddingLeft="50dp"
android:textSize="17sp" />
</LinearLayout>
//add_edit.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- This file is res/layout/palette.xml -->
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:dot="http://schemas.android.com/apk/res/app.test.demo"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<app.test.Dot android:id="@+id/dot1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="30dp"
android:tag="Blue dot"
dot:color="#ff1111ff"
dot:radius="20dp"
/>
<app.test.Dot android:id="@+id/dot2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:tag="White dot"
dot:color="#ffffffff"
dot:radius="40dp"
/>
</LinearLayout>
]]>