正文

Android重写TextView实现文字整齐排版的方法(附demo源码下载)

︶ㄣ米米素材网 メ
米米素材网V管理员 / 阅读
0717

这篇文章主要介绍了Android重写TextView实现文字整齐排版的方法,结合实例形式分析了Android重写TextView实现文字整齐排版的相关技巧,并附带demo源码供读者下载参考,需要的朋友可以参考下

本文实例讲述了重写实现文字整齐的方法。分享给大家供大家参考，具体如下：

XRTextView类

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
package rong.android.test;
import org.json.JSONArray;
import org.json.JSONException;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
import android.widget.TextView;
public class XRTextView extends TextView{
 private final String namespace = "rong.android.TextView";
 private String text;
 private float textSize;
 private float paddingLeft;
 private float paddingRight;
 private float marginLeft;
 private float marginRight;
 private int textColor;
 private JSONArray colorIndex;
 private Paint paint1 = new Paint();
 private Paint paintColor = new Paint();
 private float textShowWidth;
 private float Spacing = 0;
 private float LineSpacing = 1.3f;//行与行的间距
 public XRTextView(Context context, AttributeSet attrs) {
 super(context, attrs);
 text = attrs.getAttributeValue(
  "http://schemas.android.com/apk/res/android", "text");
 textSize = attrs.getAttributeIntValue(namespace, "textSize", 25);//字体大小
 textColor = attrs.getAttributeIntValue(namespace, "textColor",Color.BLUE);//字体颜色
 paddingLeft = attrs.getAttributeIntValue(namespace, "paddingLeft", 0);
 paddingRight = attrs.getAttributeIntValue(namespace, "paddingRight", 0);
 marginLeft = attrs.getAttributeIntValue(namespace, "marginLeft", 0);
 marginRight = attrs.getAttributeIntValue(namespace, "marginRight", 0);
 paint1.setTextSize(textSize);
 paint1.setColor(textColor);
 paint1.setAntiAlias(true);
 paintColor.setAntiAlias(true);
 paintColor.setTextSize(textSize);
 paintColor.setColor(Color.BLUE);
 }
 public XRTextView(Context context, float textSize, int textColor, float paddingLeft, float paddingRight, float marginLeft, float marginRight){
 super(context);
 this.textSize = textSize;
 this.textColor = textColor;
 this.paddingLeft = paddingLeft;
 this.paddingRight = paddingRight;
 this.marginLeft = marginLeft;
 this.marginRight = marginRight;
 paint1.setTextSize(textSize);
 paint1.setColor(textColor);
 paint1.setAntiAlias(true);
 paintColor.setAntiAlias(true);
 paintColor.setTextSize(textSize);
 paintColor.setColor(Color.BLUE);
 }
 public JSONArray getColorIndex() {
 return colorIndex;
 }
 public void setColorIndex(JSONArray colorIndex) {
 this.colorIndex = colorIndex;
 }
 /**
 * 传入一个索引，判断当前字是否被高亮
 * @param index
 * @return
 * @throws JSONException
 */
 public boolean isColor(int index) throws JSONException{
 if(colorIndex == null){
  return false;
 }
 for(int i = 0 ; i < colorIndex.length() ; i ++){
  JSONArray array = colorIndex.getJSONArray(i);
  int start = array.getInt(0);
  int end = array.getInt(1)-1;
  if(index >= start && index <= end){
  return true;
  }
 }
 return false;
 }
 @Override
 protected void onDraw(Canvas canvas) {
// super.onDraw(canvas);
 View view=(View)this.getParent();
 textShowWidth=view.getMeasuredWidth()-paddingLeft - paddingRight - marginLeft - marginRight;
 int lineCount = 0;
 text = this.getText().toString();//.replaceAll("\n", "\r\n");
 if(text==null)return;
 char[] textCharArray = text.toCharArray();
 // 已绘的宽度
 float drawedWidth = 0;
 float charWidth;
 for (int i = 0; i < textCharArray.length; i++) {
  charWidth = paint1.measureText(textCharArray, i, 1);
  if(textCharArray[i]=='\n'){
  lineCount++;
  drawedWidth = 0;
  continue;
  }
  if (textShowWidth - drawedWidth < charWidth) {
  lineCount++;
  drawedWidth = 0;
  }
  boolean color = false;
  try {
  color = isColor(i);
  } catch (JSONException e1) {
  // TODO Auto-generated catch block
  e1.printStackTrace();
  }
  if(color){
  canvas.drawText(textCharArray, i, 1, paddingLeft + drawedWidth,
   (lineCount + 1) * textSize * LineSpacing, paintColor);
  }else{
  canvas.drawText(textCharArray, i, 1, paddingLeft + drawedWidth,
   (lineCount + 1) * textSize * LineSpacing, paint1);
  }
  if(textCharArray[i] > 127 && textCharArray[i] != '、' && textCharArray[i] != '，' && textCharArray[i] != '。' && textCharArray[i] != '：' && textCharArray[i] != '！'){
  drawedWidth += charWidth + Spacing;
  }else{
  drawedWidth += charWidth;
  }
 }
 setHeight((int) ((lineCount + 1) * (int) textSize * LineSpacing + 10));
 }
 public float getSpacing() {
 return Spacing;
 }
 public void setSpacing(float spacing) {
 Spacing = spacing;
 }
 public float getMYLineSpacing() {
 return LineSpacing;
 }
 public void setMYLineSpacing(float lineSpacing) {
 LineSpacing = lineSpacing;
 }
 public float getMYTextSize() {
 return textSize;
 }
 public void setMYTextSize(float textSize) {
 this.textSize = textSize;
 paint1.setTextSize(textSize);
 paintColor.setTextSize(textSize);
 }
}

MainActivity类

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
package rong.android.test;
import android.os.Bundle;
import android.widget.TextView;
import android.app.Activity;
public class MainActivity extends Activity {
 private XRTextView xrtextview = null;
 private TextView textview = null;
 private String content = "abcdefgABCDEF我要你lfwjkdfl;skjf asljkflskjfls;kjfsljfwfisdlfjsllkjsdfjlskjf546132s1f3sd4f31s3dffslfksjdfljlsadkjflsajdf sdfjklsajdflsa;jdfls 的!@#$%^&*()_";
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 xrtextview = (XRTextView) this.findViewById(R.id.mytextview_tv);
 xrtextview.setText(content);
 textview = (TextView) this.findViewById(R.id.mytextview_tv1);
 textview.setText(content);
 }
}

布局文件

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical" >
  <rong.android.test.XRTextView
    android:id="@+id/mytextview_tv"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />
  <TextView
    android:id="@+id/mytextview_tv1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textColor="@android:color/black" />
</LinearLayout>

完整实例代码点击此处。

希望本文所述对大家Android程序设计有所帮助。