Enum for specifying the text size. SMALLEST is 50% SMALLER is 75% NORMAL is 100% LARGER is 150% LARGEST is 200%
原文：http://www.cnblogs.com/yourancao520/archive/2012/06/14/2548900.html
/**
* webview
*/
WebView wv;
/**
* Manages settings state for a WebView
*/
WebSettings settings;
/**
* 用来控制字体大小
*/
int fontSize = 1;
wv = (WebView) findViewById(R.id.webViewContent);
settings = wv.getSettings();
settings.setSupportZoom(true);
if (settings.getTextSize() == WebSettings.TextSize.SMALLEST) {
fontSize = 1;
} else if (settings.getTextSize() == WebSettings.TextSize.SMALLER) {
fontSize = 2;
} else if (settings.getTextSize() == WebSettings.TextSize.NORMAL) {
fontSize = 3;
} else if (settings.getTextSize() == WebSettings.TextSize.LARGER) {
fontSize = 4;
} else if (settings.getTextSize() == WebSettings.TextSize.LARGEST) {
fontSize = 5;
}
/**
* 设置底部按钮的事件
*/
private void setImageViewClick() {
/**
* 缩小按钮
*/
imgViewSX.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
fontSize--;
if (fontSize < 0) {
fontSize = 1;
}
switch (fontSize) {
case 1:
settings.setTextSize(WebSettings.TextSize.SMALLEST);
break;
case 2:
settings.setTextSize(WebSettings.TextSize.SMALLER);
break;
case 3:
settings.setTextSize(WebSettings.TextSize.NORMAL);
break;
case 4:
settings.setTextSize(WebSettings.TextSize.LARGER);
break;
case 5:
settings.setTextSize(WebSettings.TextSize.LARGEST);
break;
}
}
});
/**
* 放大按钮
*/
imgViewFD.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
fontSize++;
if (fontSize > 5) {
fontSize = 5;
}
switch (fontSize) {
case 1:
settings.setTextSize(WebSettings.TextSize.SMALLEST);
break;
case 2:
settings.setTextSize(WebSettings.TextSize.SMALLER);
break;
case 3:
settings.setTextSize(WebSettings.TextSize.NORMAL);
break;
case 4:
settings.setTextSize(WebSettings.TextSize.LARGER);
break;
case 5:
settings.setTextSize(WebSettings.TextSize.LARGEST);
break;
}
}
});
final String mimeType = "text/html";
final String encoding = "UTF-8";
content = getContentFromNewWork(newsId);
wv.loadDataWithBaseURL("", content, mimeType, encoding, "");