android仿ios版本飛常準app字母列表索引，純原創。
阿新 • • 發佈：2019-02-13
仿飛常準字母索引，純原創。
偶然看見飛常準（ios）的字母列表索引，覺得很酷炫，ios可以的android沒有不行的，所以就寫了一個demo，實現效果完全一樣。
自定義字母索引view
package com.example.sunsh.letter;
import android.animation.Animator;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import Activity
package com.example.sunsh.letter;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private ArrayList<String> strings;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ListView listView = (ListView) findViewById(R.id.listview);
LetterIndext letterIndext = (LetterIndext) findViewById(R.id.letter);
final ArrayList<String> list = new ArrayList<>();
for (char i = 63; i <= 90; i++) {
list.add(i+"");
}
letterIndext.setList(list);
letterIndext.setOnSeletListener(new LetterIndext.OnSeletListener() {
@Override
public void onSelect(int position,String letter) {
int i = strings.indexOf(letter);
listView.setSelection(i);
}
});
findViewById(R.id.text).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(MainActivity.this,"keyi ",Toast.LENGTH_SHORT).show();
}
});
strings = new ArrayList<>();
for (char i = 63; i <= 90; i++) {
strings.add(i+"");
for (int j = 0; j < 10; j++) {
strings.add(i+""+i);
}
}
listView.setAdapter(new BaseAdapter() {
@Override
public int getCount() {
return strings.size();
}
@Override
public Object getItem(int i) {
return null;
}
@Override
public long getItemId(int i) {
return 0;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
TextView textView = new TextView(MainActivity.this);
textView.setText(strings.get(i));
textView.setPadding(20,20,20,20);
return textView;
}
});
}
}
... prompt'''xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:background="#70000000"
android:layout_height="match_parent"
tools:context="com.example.sunsh.letter.MainActivity">
<ListView
android:id="@+id/listview"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ListView>
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_centerInParent="true"
android:layout_height="wrap_content"
android:text="Hello World!" />
<com.example.sunsh.letter.LetterIndext
android:id="@+id/letter"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
... prompt'''