今天就跟大家聊聊有關(guān)Android開(kāi)發(fā)中怎么自定義時(shí)間軸，可能很多人都不太了解，為了讓大家更加了解，小編給大家總結(jié)了以下內(nèi)容，希望大家根據(jù)這篇文章可以有所收獲。
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具體內(nèi)容如下
時(shí)間軸效果，實(shí)際上非常簡(jiǎn)單，就是listView中一個(gè)又一個(gè)的條目而已….大家可以只關(guān)注一個(gè)條目。
首先展示一個(gè)條目的布局效果
<?xml version="1.0" encoding="utf-8"?>
接下來(lái)看一下自定義的TimeView如何書寫
重慶分公司
重慶分公司
package com.example.time;
import java.util.Random;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
public class TimeView extends View {
private Random random;
private String time;
private Rect mBounds = new Rect();
private int rgb;
public TimeView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initView();
}
public TimeView(Context context, AttributeSet attrs) {
super(context, attrs);
initView();
}
public TimeView(Context context) {
super(context);
initView();
}
private void initView() {
random = new Random();
//定義顏色---這里純粹為了好玩--大家定義的時(shí)候可以在自定義控件外邊定義，將顏色傳遞進(jìn)來(lái)
rgb = Color.rgb(100+random.nextInt(155), 100+random.nextInt(155),
random.nextInt(100+155));
}
public void setTime(String time) {
this.time = time;
invalidate();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
Paint paint = new Paint();
paint.setColor(rgb);
paint.setAntiAlias(true);
paint.setStyle(Style.FILL_AND_STROKE);
//先繪制圓
canvas.drawCircle(getWidth() / 2, getHeight() / 2, getWidth() / 2,
paint);
paint = new Paint();
paint.setColor(Color.BLACK);
paint.setTextSize(30);
paint.getTextBounds(time, 0, time.length(), mBounds);
float textWidth = mBounds.width();
float textHeight = mBounds.height();
//再繪制文字
canvas.drawText(time, getWidth() / 2 - textWidth / 2, getHeight() / 2
+ textHeight / 2, paint);
}
}看一下Activity中的代碼–就是一個(gè)ListView的效果展示
public class MainActivity extends Activity {
private ListView listView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listView);
initData();
listView.setAdapter(new MyBaseAdapter());
}
class MyBaseAdapter extends BaseAdapter {
@Override
public int getCount() {
return dataList.size();
}
@Override
public Object getItem(int arg0) {
return dataList.get(arg0);
}
@Override
public long getItemId(int arg0) {
return arg0;
}
@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
View view = View.inflate(MainActivity.this, R.layout.item, null);
TextView tv_content = (TextView) view.findViewById(R.id.tv_content);
TextView tv_time = (TextView) view.findViewById(R.id.tv_time);
TimeView timeView = (TimeView) view.findViewById(R.id.timeView);
timeView.setTime(dataList.get(arg0).getTime());
tv_content.setText(dataList.get(arg0).getContent());
tv_time.setText(dataList.get(arg0).getTime());
return view;
}
}
ArrayList dataList = new ArrayList();
private void initData() {
for (int i = 0; i < 20; i++) {
dataList.add(new DataBean("哈哈哈哈" + i, "25/10"));
}
}
} 看完上述內(nèi)容，你們對(duì)Android開(kāi)發(fā)中怎么自定義時(shí)間軸有進(jìn)一步的了解嗎？如果還想了解更多知識(shí)或者相關(guān)內(nèi)容，請(qǐng)關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道，感謝大家的支持。
