修改android默认浏览器

PackageManager packageManager = context.getPackageManager();
String str1 = "android.intent.category.DEFAULT";
String str2 = "android.intent.category.BROWSABLE";
String str3 = "android.intent.action.VIEW";

//设置默认项的必须参数之一,用户的操作符合该过滤器时,默认设置起效
IntentFilter filter = new IntentFilter(str3);
filter.addCategory(str1);
filter.addCategory(str2);
filter.addDataScheme("http");
//设置浏览页面用的Activity
ComponentName component = new ComponentName(context
.getPackageName(), BrowserActivity.class.getName());

Intent intent = new Intent(str3);
intent.addCategory(str2);
intent.addCategory(str1);
Uri uri = Uri.parse("http://");
intent.setDataAndType(uri, null);

//找出手机当前安装的所有浏览器程序
List<ResolveInfo> resolveInfoList = packageManager
.queryIntentActivities(intent,
PackageManager.GET_INTENT_FILTERS);

int size = resolveInfoList.size();
ComponentName[] arrayOfComponentName = new ComponentName[size];
for (int i = 0; i < size; i++)
{
ActivityInfo activityInfo = resolveInfoList.get(i).activityInfo;
String packageName = activityInfo.packageName;
String className = activityInfo.name;
//清除之前的默认设置
packageManager.clearPackagePreferredActivities(packageName);
ComponentName componentName = new ComponentName(packageName,
className);
arrayOfComponentName[i] = componentName;
}
packageManager.addPreferredActivity(filter,
IntentFilter.MATCH_CATEGORY_SCHEME, arrayOfComponentName,
component);