3
我正在嘗試創建一個表單，用戶可以在其中移動輸入。我有一個editText，並希望它能夠將它移動到我的relativeLayout中的新位置。我能夠把它撿起來並移動它，但是一旦我放開它，它就會完全消失。我已經嘗試了幾乎所有的東西。我認爲onDrag方法可能永遠不會被調用，因爲我的日誌從不出現。另外，放開我的editText後，我在logcat中得到這個錯誤信息：Reporting drop result: falseAndroid：拖放後，被拖動的editText消失
我一直在遇到的另一個問題是，當你點擊editText時，它認爲我想拖動它，意思是我可以實際上並沒有改變它裏面的文字。
任何幫助表示讚賞！謝謝！
這裏是我的相對佈局：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
android:paddingBottom = "@dimen/activity_vertical_margin"
android:paddingLeft = "@dimen/activity_horizontal_margin"
android:paddingRight = "@dimen/activity_horizontal_margin"
android:paddingTop = "@dimen/activity_vertical_margin"
app:layout_behavior = "@string/appbar_scrolling_view_behavior"
tools:context = "com.supercilex.myapp.NewForm"
tools:showIn = "@layout/activity_new_form"
android:id="@+id/relativeLayout">
<EditText
android:id = "@+id/editText"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:layout_alignParentStart = "true"
android:layout_alignParentTop = "true"
android:ems = "10"
android:hint = "Enter some text"
android:inputType = "textPersonName" />
</RelativeLayout>
這裏是我的類：
import android.content.ClipData;
import android.content.ClipDescription;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.DragEvent;
import android.view.MotionEvent;
import android.view.View;
import android.widget.EditText;
import android.widget.RelativeLayout;
import common.FileManagement;
public class NewForm extends AppCompatActivity
{
private static EditText editText;
private android.widget.RelativeLayout.LayoutParams layoutParams;
String msg;
@Override
protected void onCreate (Bundle savedInstanceState)
{
super.onCreate (savedInstanceState);
setContentView (R.layout.activity_new_form);
Toolbar toolbar = (Toolbar) findViewById (R.id.toolbar);
setSupportActionBar (toolbar);
editText = (EditText) findViewById (R.id.editText);
FileManagement fileManagement = new FileManagement();
editText.setText (fileManagement.read ("textViewData", getApplicationContext()));
FloatingActionButton fab = (FloatingActionButton) findViewById (R.id.fab);
fab.setOnClickListener (new View.OnClickListener()
{
@Override
public void onClick (View view)
{
FileManagement fileManagement = new FileManagement();
String tmpEditText = editText.getText().toString();
MainActivity.textView.setText (tmpEditText);
fileManagement.save ("textViewData", tmpEditText, getApplicationContext());
finish();
}
});
editText.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
ClipData.Item item = new ClipData.Item((CharSequence)v.getTag());
String[] mimeTypes = { ClipDescription.MIMETYPE_TEXT_PLAIN};
ClipData dragData = new ClipData(v.getTag().toString(),mimeTypes, item);
View.DragShadowBuilder myShadow = new View.DragShadowBuilder(editText);
v.startDrag(dragData,myShadow,null,0);
return true;
}
});
editText.setOnDragListener(new View.OnDragListener() {
@Override
public boolean onDrag(View v, DragEvent event) {
switch(event.getAction())
{
case DragEvent.ACTION_DRAG_STARTED:
layoutParams = (RelativeLayout.LayoutParams)v.getLayoutParams();
Log.d(msg, "Action is DragEvent.ACTION_DRAG_STARTED");
return true;
case DragEvent.ACTION_DRAG_ENTERED:
Log.d(msg, "Action is DragEvent.ACTION_DRAG_ENTERED");
int x_cord = (int) event.getX();
int y_cord = (int) event.getY();
return true;
case DragEvent.ACTION_DRAG_EXITED :
Log.d(msg, "Action is DragEvent.ACTION_DRAG_EXITED");
x_cord = (int) event.getX();
y_cord = (int) event.getY();
layoutParams.leftMargin = x_cord;
layoutParams.topMargin = y_cord;
v.setLayoutParams(layoutParams);
return true;
case DragEvent.ACTION_DRAG_LOCATION :
Log.d(msg, "Action is DragEvent.ACTION_DRAG_LOCATION");
x_cord = (int) event.getX();
y_cord = (int) event.getY();
return true;
case DragEvent.ACTION_DRAG_ENDED :
Log.d (msg, "Action is DragEvent.ACTION_DRAG_ENDED");
return true;
case DragEvent.ACTION_DROP:
Log.d(msg, "ACTION_DROP event");
return true;
default:
break;
}
return true;
}
});
editText.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
ClipData data = ClipData.newPlainText("", "");
View.DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(editText);
editText.startDrag(data, shadowBuilder, editText, 0);
editText.setVisibility(View.INVISIBLE);
return true;
}
else
{
return false;
}
}
});
}
}
我也試過ondrag當我與方法的break;代替return true; 我已經試過了這個方式：
public boolean onDrag(View v, DragEvent event) {
switch(event.getAction())
{
case DragEvent.ACTION_DRAG_STARTED:
break;
case DragEvent.ACTION_DRAG_ENTERED:
break;
case DragEvent.ACTION_DRAG_EXITED :
break;
case DragEvent.ACTION_DRAG_LOCATION :
break;
case DragEvent.ACTION_DRAG_ENDED :
break;
case DragEvent.ACTION_DROP:
View view = (View) event.getLocalState();
ViewGroup owner = (ViewGroup) view.getParent();
owner.removeView(view);
FrameLayout container = (FrameLayout) v;
container.addView(view);
view.setVisibility(View.VISIBLE);
Log.d(msg, "ACTION_DROP event");
break;
default:
break;
}
return true;
}
編輯： 這是我更新的代碼：
以上onCreate()
private EditText editText;
private RelativeLayout.LayoutParams layoutParams;
其餘：
findViewById(R.id.yourlayoutname).setOnDragListener(new View.OnDragListener()
{
@Override
public boolean onDrag (View v, DragEvent event)
{
if (event.getAction() == DragEvent.ACTION_DROP)
{
int xCord = (int) event.getX();
int yCord = (int) event.getY();
int height = editText.getHeight();
int width = editText.getWidth();
layoutParams.leftMargin = xCord - width;
layoutParams.topMargin = yCord - height;
editText.setLayoutParams(layoutParams);
}
return true;
}
});
editText.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
String[] mimeTypes = { ClipDescription.MIMETYPE_TEXT_PLAIN};
ClipData data = ClipData.newPlainText("", "");
View.DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(editText);
v.startDrag(data, shadowBuilder, mimeTypes, 0);
return true;
}
});
editText.setOnDragListener(new View.OnDragListener()
{
@Override
public boolean onDrag (View v, DragEvent event)
{
if (event.getAction() == DragEvent.ACTION_DRAG_STARTED)
{
layoutParams = (RelativeLayout.LayoutParams) v.getLayoutParams();
}
return true;
}
});
'如果你想刪除的配位是EditText上的新位置比你需要分配DragListener到EditText容器的RelativeLayout並在ACTION_DROP'中檢索它們。如果你能告訴我該怎麼做，我會很喜歡它。 – SUPERCILEX
謝謝！我將您的答案標記爲已接受並+1。 :) – SUPERCILEX