自定义控件解决android中TextView中英文换行问题_android textview 英文单词在第一行末尾展示不下单词分开展示,不换行

现有textView存在的问题

 <TextView
        android:id="@+id/id_normal"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:background="@android:color/white"/>
1
2
3
4
5

设置如下文字效果图

从上面的设置中可以明显看出，当文本中即含有中文，又含有英文的时候，文本并不是在每行的末尾换行的，这样就造成了我们的UI界面难看；

解决方法

这里采用自定义View的方式写了一个可以适配文本的控件

使用方法

• maxlines表示需要显示的最大行数，通过该值生成对应的子textView并添加到布局中
• 通过测量的方式paint.breakText(mText, start, mText.length(), true, mWidth, null);计算出每一行所要设置的文本长度

<com.qianxi.view.NameTextView
    android:id="@+id/id_name"
    android:layout_width="150dp"
    android:layout_height="wrap_content"
    android:background="#ff0"
    android:maxLines="2"
    android:padding="5dp"
    android:textColor="#f00"
    android:textSize="16sp">

</com.qianxi.view.NameTextView>
1
2
3
4
5
6
7
8
9
10
11

完整代码

public class NameTextView extends LinearLayout {
    private final String NAME_SPACE = "http://schemas.android.com/apk/res/android";
    private final String ATTR_TEXT_COLOR = "textColor";
    private final String ATTR_TEXT_SIZE = "textSize";
    private final String ATTR_MAX_LINES = "maxLines";

    private final int DEFAULT_COLOR = 0x88000000;

    private Context mContext;
    private int mTextColor, mTextSize, mMaxLines;

    private String mText = "";// 要写入的文本

    private int mWidth;// 控件宽度

    private List<TextView> mChildViews;

    private boolean canDraw = false;

    public NameTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.mContext = context;

        if (attrs != null) {
            mMaxLines = attrs.getAttributeIntValue(NAME_SPACE, ATTR_MAX_LINES, 2);
            mTextColor = attrs.getAttributeIntValue(NAME_SPACE, ATTR_TEXT_COLOR, DEFAULT_COLOR);
            String size = attrs.getAttributeValue(NAME_SPACE, ATTR_TEXT_SIZE);
            if (TextUtils.isEmpty(size)) {
                mTextSize = 12;
            } else {
                mTextSize = Integer.parseInt(size.substring(0, size.lastIndexOf(".")));
            }
        }

        initSelf();
        initView();
    }

    private void initSelf() {
        setOrientation(VERTICAL);
        setWillNotDraw(true);
    }

    private void initView() {
        mChildViews = new ArrayList<>();
        for (int i = 0; i < mMaxLines; i++) {
            TextView v = createChildTextView();
            mChildViews.add(v);
            addView(v);
        }
    }

    /**
     * 构建子的TextView
     */
    private TextView createChildTextView() {
        TextView v = new TextView(mContext);
        v.setTextColor(mTextColor);
        v.setTextSize(mTextSize);
        v.setMaxLines(1);
        v.setSingleLine();
        v.setEllipsize(TruncateAt.END);
        v.setGravity(Gravity.CENTER_VERTICAL);
        LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT,
                LayoutParams.WRAP_CONTENT);
        v.setLayoutParams(params);

        return v;
    }

    @Override
    protected void dispatchDraw(Canvas canvas) {
        super.dispatchDraw(canvas);
        if (canDraw) {
            setContent();
            canDraw = false;
        }
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        this.mWidth = w - getPaddingLeft() - getPaddingRight();
    }

    /**
     * set the content
     *
     * @param text content
     */
    @SuppressLint("NewApi")
    public void setText(@NonNull String text) {
        if (TextUtils.isEmpty(text) || this.mText.equals(text)) return;
        this.mText = text.trim();
        canDraw = true;
        invalidate();
    }

    /**
     * @param text content
     * @param line content-line
     */
    @SuppressLint("NewApi")
    public void setText(@NonNull String text, int line) {
        if (TextUtils.isEmpty(text) || this.mText.equals(text)) return;
        this.mMaxLines = line;
        this.mText = text.trim();
        canDraw = true;
        invalidate();
    }

    /**
     * 将内容设置到布局中
     */
    private void setContent() {
        Paint paint = mChildViews.get(0).getPaint();
        int start = 0;

        for (int i = 0; i < mMaxLines; i++) {
            TextView v = mChildViews.get(i);

            String str;
            if (i == mMaxLines - 1) {
                str = mText.substring(start);
            } else {
                int count = paint.breakText(mText, start, mText.length(), true, mWidth, null);
                str = mText.substring(start, start + count);
                start += count;
            }
            Log.d("NameTextView", "i=" + i + "=====" + str);
            v.setText(str);
            if (start >= mText.length()) break;
        }
    }
}
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