Android TextView设置详解-优快云博客

本文介绍了在Android中如何使用两种方式设置TextView文字居中显示的方法，同时涵盖了如何通过监听EditText的文字变化来实现高度自适应调整的技术细节。

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android:lineSpacingExtra="10dp"


有2种方法可以设置TextView文字居中：

一：在xml文件设置： android:gravity="center"

二：在程序中设置： txtTitle.setGravity(Gravity.CENTER);

设置控件居中：

android:layout_gravity="center"是 对textview控件在整个布局中居中，也可以在其父layout中调用设置 android:gravity="center"

程序中也是需要设置其所在控件的父layout，例如：

RelativeLayout.LayoutParams layoutParams=
            new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
            layoutParams.addRule(RelativeLayout.CENTER_IN_PARENT);
            mTextView.setLayoutParams(layoutParams);

edittext 高度随文字的增加高度自动增加

iProfileEdit.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            @Override
            public void afterTextChanged(Editable s) {
                changeEditTextHeight(s.toString());
            }
        });



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    private void changeEditTextHeight(String s) {
        TextView textView = new TextView(PostIssueActivity.this);
        textView.setText(s.toString());
        int widthMeasureSpec = MeasureSpec.makeMeasureSpec(iProfileEdit.getMeasuredWidth(), MeasureSpec.EXACTLY);
        int heightMeasureSpec = MeasureSpec.makeMeasureSpec(800, MeasureSpec.AT_MOST);
        textView.measure(widthMeasureSpec, heightMeasureSpec);
        int textHeight = textView.getMeasuredHeight();
        int minHeight = dip2px(80);
        LayoutParams layoutParams = iProfileEdit.getLayoutParams();
        if (textHeight < minHeight) {
            layoutParams.height = minHeight;
        } else {
            layoutParams.height = textHeight;
        }
        iProfileEdit.setLayoutParams(layoutParams);
    }