Android 实现自定义圆形listview功能的实例代码
最近遇到一个需求需要圆形listview作为悬浮窗，费了九牛二虎之力终于开发出来了，特别有成就感，下面分享下案例，项目原因，只能分享一部分供大家参考
1.有图有真相
下面就来讲解下代码：
1.自定义listview
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
public class CircleListView extends ViewGroup {
private static final double intervalAngel = 60;//子view之间的间隔角
int circleR;//圆的半径
int ccx;//圆心的x轴坐标
int ccy;//圆心的y轴坐标
double angel = 0;//偏移角度
private float oldTouchY;//上一次触摸的y轴位置
private boolean isScrolling = false;//是否在滑动状态
private Bitmap circleBitmap = null;
private Rect src;
private Rect dst;
private Paint paint;
private Adapter adapter = new Adapter(this) {
@Override
public View getView(int position) {
return new View(getContext());
}
};
public CircleListView(Context context) {
super(context);
setWillNotDraw(false);
paint = new Paint();
}
public CircleListView(Context context, AttributeSet attrs) {
super(context, attrs);
setWillNotDraw(false);
paint = new Paint();
// TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.CircleListView);
// setCircleBitMap(ta.getResourceId(R.styleable.CircleListView_circleDrawable, 0));
// ta.recycle();
}
private void setCircleBitMap(int drawableId) {
if (drawableId != 0) {
circleBitmap = BitmapFactory.decodeResource(getResources(), drawableId);
} else {
circleBitmap = null;
}
}
public void setAdapter(Adapter adapter) {
this.adapter = adapter;
refreshList();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
measureChildren(widthMeasureSpec, heightMeasureSpec);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (circleBitmap != null) {
if (src == null) {
src = new Rect();
}
src.left = 0;
src.top = 0;
src.right = circleBitmap.getWidth();
src.bottom = circleBitmap.getHeight();
if (dst == null) {
dst = new Rect();
}
dst.left = ccx - circleBitmap.getWidth()/4;
dst.top = ccy - circleBitmap.getHeight()/4;
dst.right = ccx + circleBitmap.getWidth()/4;
dst.bottom = ccy + circleBitmap.getHeight()/4;
canvas.drawBitmap(circleBitmap, src, dst, paint);
}
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
circleR = (getRight() - getLeft()) / 10 * 5;
ccy = (int) (getHeight() * 0.5);
ccx = getWidth() / 2;
for (int i = 0; i < adapter.getCount(); i++) {
View childView = getChildAt(i);
double childViewAngel = i * intervalAngel + angel;
int x = ccx + (int) (Math.sin(Math.toRadians(childViewAngel)) * circleR*0.6);
int y = ccy - (int) (Math.cos(Math.toRadians(childViewAngel)) * circleR*0.6);
int vl = x - childView.getMeasuredWidth() / 2;
int vt = y - childView.getMeasuredHeight() / 2;
int vr = x + childView.getMeasuredWidth() / 2;
int vb = y + childView.getMeasuredHeight() / 2;
childView.layout(vl, vt, vr, vb );
}
}
// @Override
// public boolean dispatchTouchEvent(MotionEvent ev) {
// switch (ev.getAction()) {
// case MotionEvent.ACTION_DOWN:
// oldTouchY = ev.getY();
// super.dispatchTouchEvent(ev);
// return true;
// case MotionEvent.ACTION_MOVE:
// if (!isScrolling && Math.abs(oldTouchY - ev.getY()) > 50) {
// isScrolling = true;
// float offSetY = 0;
// oldTouchY = ev.getY();
// angel += offSetY / 20;
// requestLayout();
// return true;
// } else if (isScrolling) {
// float offSetY = ev.getY() - oldTouchY;
// oldTouchY = ev.getY();
// if ((angel + offSetY / 20) < ((adapter.getCount() - 1) * -intervalAngel)) {
// angel = (adapter.getCount() - 1) * -intervalAngel;
// } else if ((angel + offSetY / 20) > 0) {
// angel = 0;
// } else {
// angel += offSetY / 20;
// }
// requestLayout();
// return true;
// }
// return super.dispatchTouchEvent(ev);
// case MotionEvent.ACTION_UP:
// boolean notDispatch = isScrolling;
// isScrolling = false;
// if (notDispatch) {
// return false;
// } else {
// performClick();
// return super.dispatchTouchEvent(ev);
// }
// default:
// isScrolling = false;
// return super.dispatchTouchEvent(ev);
// }
// }
protected void refreshList() {
removeAllViews();
for (int i = 0; i < adapter.getCount(); i++) {
if (i == 0 && angel < -intervalAngel * (adapter.getCount() - 1)) {
angel = -intervalAngel * (adapter.getCount() - 1);
}
addView(adapter.getView(i));
if (adapter.getCount() == 1) {
setPosition(0);
}
}
invalidate();
}
protected void setPosition(int position) {
angel = -position * intervalAngel;
}
}
2.实体类
import android.graphics.drawable.Drawable;
public class Files {
private int id;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getApp_name() {
return app_name;
}
public void setApp_name(String app_name) {
this.app_name = app_name;
}
public String getPackagename() {
return packagename;
}
public void setPackagename(String packagename) {
this.packagename = packagename;
}
public int getImg_bg_id() {
return img_bg_id;
}
public void setImg_bg_id(int img_bg_id) {
this.img_bg_id = img_bg_id;
}
public boolean isShow() {
return isShow;
}
public void setShow(boolean show) {
isShow = show;
}
private Drawable imgDrawable;
public Drawable getImgDrawable() {
return imgDrawable;
}
public void setImgDrawable(Drawable imgDrawable) {
this.imgDrawable = imgDrawable;
}
private boolean isShow;
private String app_name;
private String packagename;
private int img_bg_id;
}
3.适配器
import android.view.View;
import java.util.ArrayList;
public abstract class Adapter {
private CircleListView circleListView;
private ArrayList<Files> allAppList;
public Adapter(CircleListView circleListView) {
this.circleListView = circleListView;
}
public int getCount() {
return allAppList.size();
}
public abstract View getView(int position);
public void notifyDataChanged() {
circleListView.refreshList();
}
public void setPosition(int position) {
if (position > getCount() - 1) {
position = getCount() - 1;
} else if (position < 0) {
position = 0;
}
circleListView.setPosition(position);
}
}
4.float.xml 引用：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/float_btn"
android:layout_width="79px"
android:layout_height="79px"
android:scaleType="fitCenter"
android:layout_centerInParent="true"
android:background="@drawable/main_selector_floatbtn"
android:clickable="true"
/>
<RelativeLayout
android:id="@+id/float_area"
android:layout_width="300px"
android:layout_height="300px"
android:layout_centerInParent="true"
android:background="@drawable/float_display_bg"
android:visibility="gone">
<com.xinrui.headsettest.circlelistview.CircleListView
android:id="@+id/circle_list_view"
android:layout_width="300px"
android:layout_height="300px"
android:layout_centerHorizontal="true"/>
<ImageView
android:id="@+id/float_main_img"
android:layout_width="70px"
android:layout_height="70px"
android:scaleType="fitCenter"
android:layout_centerInParent="true"
android:background="@drawable/float_main_icon"
android:clickable="true"/>
</RelativeLayout>
</RelativeLayout>
5.Activity中应用：
import android.app.Activity;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.xinrui.headsettest.circlelistview.Adapter;
import com.xinrui.headsettest.circlelistview.CircleListView;
import com.xinrui.headsettest.circlelistview.Files;
import java.util.ArrayList;
public class FloatActivity extends Activity implements View.OnClickListener{
private ImageView floatImg, float_main_img;
private RelativeLayout float_area;
private CircleListView circle_list_view;
private Adapter adapter;
private ArrayList<Files> appDataList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.float_layout);
getData();
init();
}
private void getData(){
appDataList=new ArrayList<>();
Files files = new Files();
files.setApp_name(this.getResources().getString(R.string.calculator_txt));
files.setImg_bg_id(R.drawable.main_selector_calculator);
appDataList.add(files);
Files files0 = new Files();
files0.setApp_name(this.getResources().getString(R.string.calendar_txt));
files0.setImg_bg_id(R.drawable.main_selector_calendar);
appDataList.add(files0);
Files files1 = new Files();
files1.setApp_name(this.getResources().getString(R.string.timer_txt));
files1.setImg_bg_id(R.drawable.main_selector_clock);
appDataList.add(files1);
Files files2 = new Files();
files2.setApp_name(this.getResources().getString(R.string.vip_txt));
files2.setImg_bg_id(R.drawable.main_selector_vip);
appDataList.add(files2);
Files files3 = new Files();
files3.setApp_name(this.getResources().getString(R.string.screen_shots_txt));
files3.setImg_bg_id(R.drawable.main_selector_screenshot);
appDataList.add(files3);
Files files4 = new Files();
files4.setApp_name(this.getResources().getString(R.string.recording_screen_txt));
files4.setImg_bg_id(R.drawable.main_selector_recordingscreen);
appDataList.add(files4);
}
private void init() {
float_area = (RelativeLayout) findViewById(R.id.float_area);
floatImg = (ImageView) findViewById(R.id.float_btn);
float_main_img = (ImageView) findViewById(R.id.float_main_img);
float_main_img.bringToFront();
floatImg.setOnClickListener(this);
float_main_img.setOnClickListener(this);
circle_list_view = findViewById(R.id.circle_list_view);
adapter = new Adapter(circle_list_view) {
@Override
public View getView(final int position) {
View view = LayoutInflater.from(FloatActivity.this).inflate(R.layout.item_app,null);
TextView app_name = view.findViewById(R.id.app_name);
ImageView app_img = view.findViewById(R.id.app_img);
ImageView delete_img = view.findViewById(R.id.delete_icon);
delete_img.bringToFront();
final Files files = appDataList.get(position);
app_name.setText(files.getApp_name());
app_img.setImageResource(files.getImg_bg_id());
if(files.isShow()){
delete_img.setVisibility(View.VISIBLE);
}else{
delete_img.setVisibility(View.INVISIBLE);
}
delete_img.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
appDataList.remove(position);
Files file = new Files();
file.setShow(false);
file.setImg_bg_id(R.drawable.main_selector_additem);
file.setApp_name(FloatActivity.this.getResources().getString(R.string.custom_txt));
appDataList.add(position,file);
adapter.notifyDataChanged();
}
});
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(FloatActivity.this,"my is "+files.getApp_name(),Toast.LENGTH_SHORT).show();
}
});
view.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
if(!files.getApp_name().equals(FloatActivity.this.getResources().getString(R.string.custom_txt))) {
for (Files file : appDataList) {
if (file.getApp_name().equals(files.getApp_name())) {
file.setShow(true);
} else {
file.setShow(false);
}
}
adapter.notifyDataChanged();
}
return true;
}
});
return view;
}
@Override
public int getCount() {
return appDataList.size();
}
};
circle_list_view.setAdapter(adapter);
adapter.setPosition(0);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.float_main_img:
float_area.setVisibility(View.GONE);
floatImg.setVisibility(View.VISIBLE);
break;
case R.id.float_btn:
float_area.setVisibility(View.VISIBLE);
floatImg.setVisibility(View.GONE);
break;
}
}
}
大功告成就这样实现了圆形listview…
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