我做了一个列表视图，在项目点击时有动画，我使用数组适配器作为数据输入，在数组适配器中我在项目点击中调用动画类，保持点击变量 clickedposition -1 在那里我调用动画....所有细节在代码中......
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public class TaskListAdapter extends ArrayAdapter<FTask> {
protected FTask[] values= null;
protected Context context = null;
private int clickedPosition = -1;
public TaskListAdapter(Context context,FTask[] values) {
this(context, R.layout.task_row, values);
}
public TaskListAdapter(Context context, int taskRow, FTask[] values) {
super(context, taskRow, values);
this.values = values;
this.context = context;
}
public void toggle(int position) {
//If its already opened. Close it. Else open it.
if(clickedPosition == position){
clickedPosition = -1;
}else{
clickedPosition = position;
}
notifyDataSetChanged();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
if (convertView == null) {
row = View.inflate(context, R.layout.task_row, null);
LinearLayout single_message_holder = (LinearLayout) row
.findViewById(R.id.single_task_holder);
single_message_holder.setBackgroundColor(Color.WHITE);
}
final FTask tsk = values[position];
TextView service_description = (TextView) row.findViewById(R.id.task_description);
service_description.setText(tsk.getBody());
TextView service_detail_description = (TextView) row.findViewById(R.id.task_detail_description);
service_detail_description.setText(tsk.getBody());
LinearLayout ani=(LinearLayout)row.findViewById(R.id.ani);
if (clickedPosition == position) {
Log.d("****Position*****",String.valueOf(position));
//service_detail_description.setAnimation(AnimationUtils.loadAnimation(context,
// R.anim.push_up_in));
ani.startAnimation(new VisibleAni(1.0f, 1.0f, 0.0f, 1.0f, 800, ani, true,true));
ani.setVisibility(View.VISIBLE);
service_description.setVisibility(View.GONE);
Log.d("SENDING TASK STATUS", "AGAINNNNN");
sendTaskStatus(tsk);
} else {
//ani.startAnimation(new VisibleAni(1.0f, 1.0f, 0.0f, 1.0f, 800, ani, true,false));
ani.setVisibility(View.GONE);
service_description.setVisibility(View.VISIBLE);
}
ImageView icon = (ImageView) row.findViewById(R.id.taskicon);
if (tsk.isDone()==1) {
icon.setImageResource(R.drawable.done);
service_description.setPaintFlags(service_description.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
} else {
icon.setImageResource(R.drawable.undone);
service_description.setPaintFlags(service_description.getPaintFlags() & ~Paint.STRIKE_THRU_TEXT_FLAG );
}
icon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(tsk.isDone()==0){
tsk.setDone(1);
notifyDataSetChanged();
}
else{
tsk.setDone(0);
notifyDataSetChanged();
}
}
});
return row;
}
private void sendTaskStatus(FTask tsk){
//TODO pathch,
Log.e("TaskListAdapter", "Set status");
if (LoginManager.getSessionId() == null ||LoginManager.getSessionId().equals("DUMMY") || LoginManager.getSessionId().equals("")){
Log.e("INVALID USER_ID or SESSION_ID", "Not connectind to network");
return;
}
NetworkDataFetcher fetcher = new NetworkDataFetcher(NetworkDataFetcher.LINK_DATA_ACCESS);
try {
String response = fetcher.execute(new String[] { MessageManager.MSG_JSON_ID_TYPE, MessageManager.MSG_JSON_ID_SESSIONID, MessageManager.MSG_JSON_ID_MID},
new String[] {"message_status", LoginManager.getSessionId(), tsk.getTskid() }).get();
if(response == null){
Log.e("TaskListAdapter", "response null");
return;
}
Log.w("TasksListAdapter", "Response = "+response);
return;
} catch (InterruptedException e) {
Log.d("InterrupptedException", "InterrupptedException");
return;
} catch (ExecutionException e) {
Log.d("ExecutionException", "ExecutionException");
return;
}
}
}
And the Animation Class
import android.view.View;
import android.view.animation.ScaleAnimation;
import android.view.animation.Transformation;
import android.widget.LinearLayout.LayoutParams;
public class VisibleAni extends ScaleAnimation {
private View mView;
private LayoutParams mLayoutParams;
private boolean mclick;
private int mMarginBottomFromY, mMarginBottomToY;
private boolean mVanishAfter = false;
public VisibleAni(float fromX, float toX, float fromY, float toY, int duration, View view,
boolean vanishAfter,boolean click) {
super(fromX, toX, fromY, toY);
setDuration(duration);
mView = view;
mclick = click;
mVanishAfter = vanishAfter;
mLayoutParams = (LayoutParams) view.getLayoutParams();
int height = mView.getHeight();
mMarginBottomFromY = (int) (height * fromY) + mLayoutParams.bottomMargin - height;
mMarginBottomToY = (int) (0 - ((height * toY) + mLayoutParams.bottomMargin)) - height;
if (!mclick) {
mView.setVisibility(View.GONE);
}
}
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
super.applyTransformation(interpolatedTime, t);
if (interpolatedTime < 1.0f) {
int newMarginBottom = mMarginBottomFromY + (int) ((mMarginBottomToY - mMarginBottomFromY) * interpolatedTime);
mLayoutParams.setMargins(mLayoutParams.leftMargin, mLayoutParams.topMargin,
mLayoutParams.rightMargin, newMarginBottom);
mView.getParent().requestLayout();
} else if (mVanishAfter ) {
mView.setVisibility(View.VISIBLE);
}
}
}
And the XML file related to this is ..........
<?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="vertical"
android:descendantFocusability="blocksDescendants"
>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/single_task_holder"
android:gravity="top|left"
android:paddingRight="10dp"
android:paddingLeft="0dp"
android:paddingTop="0dp"
android:background="@color/white"
android:orientation="horizontal"
>
<LinearLayout
android:id="@+id/task_icon_lay"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageView
android:id="@+id/taskicon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top"
/>
</LinearLayout>
<LinearLayout android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/task_description"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingBottom="10dp"
android:paddingLeft="10dp"
android:singleLine="true"
android:ellipsize="end"
android:paddingRight="20dp"
android:textSize="16dp"
android:textColor="@color/body_color"
/>
</LinearLayout>
<LinearLayout android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/ani"
android:orientation="vertical">
<TextView
android:id="@+id/task_detail_description"
android:textAppearance="?android:attr/textAppearanceMedium"
android:background="@android:drawable/edit_text"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingBottom="15dp"
android:paddingLeft="15dp"
android:paddingTop="15dp"
android:paddingRight="20dp"
android:textSize="16dp"
android:textColor="@color/body_color"
/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
` 在第一次单击时它工作正常，但在第二次我单击同一个项目时它变得不规则............