TextView之你不知道的使用技巧
<p>作为程序员,对自己写的代码要尽可能做到优化,但是,往往最简单的却最容易被忽视,比如,今天要给大家说的(只会说平时会被忽略的属性或者技巧,最常用的属性不介绍),TextView的使用奇技淫巧,且听我慢慢道来。</p> <p>无图无真相(有点丑):</p> <p style="text-align: center;"><img src="https://simg.open-open.com/show/7792f17dc5784afeab82aebed4c333cb.png"></p> <p> </p> <p>下面就是代码(注释很详细)</p> <pre> <code class="language-java">public class MainActivity extends AppCompatActivity { private TextView tv1, tv2, tv3, tv4, tv5, tv6, tv8; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); initView(); } private void initView() { setContentView(R.layout.activity_main); tv1 = (TextView) findViewById(R.id.tv1); tv1.setText(getString(R.string.xliff_1, "code小生", "Android爱好者")); tv2 = (TextView) findViewById(R.id.tv2); tv2.setTypeface(Typeface.createFromAsset(getAssets(), "simkai.ttf")); tv3 = (TextView) findViewById(R.id.tv3); setTextSpannable(tv3); // 定制超链接 tv4 = (TextView) findViewById(R.id.tv4); tv4.setText(getClickableSpan(tv4)); //设置该句使设置了链接的文本的超连接起作用 tv4.setMovementMethod(LinkMovementMethod.getInstance()); // 设置多种颜色字体 tv5 = (TextView) findViewById(R.id.tv5); String str1 = "<font color=\"#404f50\">年轻的我们,</font>"; String str2 = "<font color=\"#ff0000\">即将奔赴战场</font>"; tv5.setText(Html.fromHtml(str1 + str2)); // 加载html中的图片 tv6 = (TextView) findViewById(R.id.tv6); setHtmlBitmap(tv6); tv8 = (TextView) findViewById(R.id.tv8); String text = String.format("¥%1$s 门市价:¥%2$s", "88.8", "150"); int index = text.indexOf("门"); SpannableStringBuilder span = new SpannableStringBuilder(text); span.setSpan(new ForegroundColorSpan(Color.parseColor("#00ff00")), 0, index - 1, Spanned.SPAN_EXCLUSIVE_INCLUSIVE); span.setSpan(new AbsoluteSizeSpan(28), index, text.length(), Spanned.SPAN_EXCLUSIVE_INCLUSIVE); span.setSpan(new ForegroundColorSpan(Color.parseColor("#afafaf")), index, text.length(), Spanned.SPAN_EXCLUSIVE_INCLUSIVE); tv8.setText(span); } //http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2015/0120/2335.html /** * * 设置TextView中的某个词突出显示 * * @param textView */ private void setTextSpannable(TextView textView) { String text = textView.getText().toString().trim(); int start = text.indexOf('5'); int end = text.length(); Spannable textSpan = new SpannableStringBuilder(text); textSpan.setSpan(new AbsoluteSizeSpan(30), 0, start, Spannable.SPAN_INCLUSIVE_INCLUSIVE); // textSpan.setSpan(new AbsoluteSizeSpan(45), start, end - 3, Spannable.SPAN_INCLUSIVE_INCLUSIVE); // 设置文字颜色 textSpan.setSpan(new ForegroundColorSpan(Color.BLUE), start, end - 3, Spannable.SPAN_INCLUSIVE_INCLUSIVE); textSpan.setSpan(new AbsoluteSizeSpan(30), end - 3, end, Spannable.SPAN_INCLUSIVE_INCLUSIVE); textView.setText(textSpan); } //给指定文本设置超链接 private SpannableString getClickableSpan(TextView textView) { String text = textView.getText().toString().trim(); final SpannableString spanStr = new SpannableString(text); spanStr.setSpan(new UnderlineSpan(), 16, 20, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); //设置文字的单击事件 spanStr.setSpan(new ClickableSpan() { @Override public void onClick(View widget) { Toast.makeText(MainActivity.this, "服务条款", Toast.LENGTH_SHORT).show(); } }, 16, 20, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); spanStr.setSpan(new ForegroundColorSpan(Color.BLUE), 16, 20, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); // 取消点击时的默认背景色 spanStr.setSpan(new BackgroundColorSpan(Color.WHITE), 16, 20, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); spanStr.setSpan(new UnderlineSpan(), 21, 25, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); //设置文字的单击事件 spanStr.setSpan(new ClickableSpan() { @Override public void onClick(View widget) { Toast.makeText(MainActivity.this, "隐私政策", Toast.LENGTH_SHORT).show(); } }, 21, 25, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); spanStr.setSpan(new ForegroundColorSpan(Color.GREEN), 21, 25, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); spanStr.setSpan(new BackgroundColorSpan(Color.WHITE), 21, 25, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); return spanStr; } /** * TextView加载html/xml中的图片和文字 * * @param textView */ private void setHtmlBitmap(TextView textView) { String imgStr = "<b>this is html text</b><br><img src=\"" + R.mipmap.ic_launcher + "\"/>"; Html.ImageGetter imageGetter = new Html.ImageGetter() { @Override public Drawable getDrawable(String source) { int id = Integer.parseInt(source); Drawable draw = getResources().getDrawable(id); draw.setBounds(0, 0, 200, 200); return draw; } }; textView.append(Html.fromHtml(imgStr, imageGetter, null)); } }</code></pre> <p> </p> <p> </p> <p>来自:http://www.jianshu.com/p/404949cfbc27</p> <p> </p>
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