textview的分行显示

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第一种是

<TextView    android:id="@+id/tv_servicequality"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="谢谢乘坐\n请对本次服务评价"    android:textSize="45dp"/>

或者自己自定义TextView，代码如下：

import android.content.Context;import android.graphics.Paint;import android.text.TextUtils;import android.util.AttributeSet;import android.widget.TextView;/** * Created by Administrator on 2016/10/13. */public class AutoSplitTextView extends TextView{    private boolean mEnabled = true;     public AutoSplitTextView(Context context) {                super(context);           }    public AutoSplitTextView(Context context, AttributeSet attrs) {                 super(context, attrs);             }    public AutoSplitTextView(Context context, AttributeSet attrs, int defStyle) {                super(context, attrs, defStyle);             }    public void setAutoSplitEnabled(boolean enabled) {                mEnabled = enabled;             }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {                 if (MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.EXACTLY                     && MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.EXACTLY                     && getWidth() > 0 && getHeight() > 0 && mEnabled) {                         String newText = autoSplitText(this);                        if (!TextUtils.isEmpty(newText)) {                                setText(newText);                             }                    }                super.onMeasure(widthMeasureSpec, heightMeasureSpec);             }    private String autoSplitText(final TextView tv) {                final String rawText = tv.getText().toString(); //原始文本                 final Paint tvPaint = tv.getPaint(); //paint，包含字体等信息               final float tvWidth = tv.getWidth() - tv.getPaddingLeft() - tv.getPaddingRight(); //控件可用宽度                 //将原始文本按行拆分                String [] rawTextLines = rawText.replaceAll("\r", "").split("\n");                 StringBuilder sbNewText = new StringBuilder();                for (String rawTextLine : rawTextLines) {                       if (tvPaint.measureText(rawTextLine) <= tvWidth) {                                //如果整行宽度在控件可用宽度之内，就不处理了                                 sbNewText.append(rawTextLine);                             } else {                                //如果整行宽度超过控件可用宽度，则按字符测量，在超过可用宽度的前一个字符处手动换行                                float lineWidth = 0;                                 for (int cnt = 0; cnt != rawTextLine.length(); ++cnt) {                                         char ch = rawTextLine.charAt(cnt);                                         lineWidth += tvPaint.measureText(String.valueOf(ch));                                         if (lineWidth <= tvWidth) {                                                sbNewText.append(ch);                                             } else {                                                sbNewText.append("\n");                                               lineWidth = 0;                                                --cnt;                                            }                                   }                          }                      sbNewText.append("\n");                     }               //把结尾多余的\n去掉               if (!rawText.endsWith("\n")) {                        sbNewText.deleteCharAt(sbNewText.length() - 1);                    }                return sbNewText.toString();        }}

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