在不使用第三方的SDK情况下，如何在Android上直接分享图片到指定的应用上，例如分享到微信、来往、QQ等。具体实现见贴出的代码。实现后才发现好简单的

例如：要在app中直接分享图片到微信、来往等，而不调用他们的sdk

直接贴代码如下;

public void shareImage(Bitmap bitmap) {

try {

Uri uriToImage = Uri.parse(MediaStore.Images.Media.insertImage(

mContext.getContentResolver(), bitmap, null, null));

Intent shareIntent = new Intent();

shareIntent.setAction(Intent.ACTION_SEND);

shareIntent.putExtra(Intent.EXTRA_STREAM, uriToImage);

shareIntent.setType("image/*");

// 遍历所有支持发送图片的应用。找到需要的应用

PackageManager packageManager = mContext.getPackageManager();

List resolveInfoList = packageManager

.queryIntentActivities(shareIntent,

PackageManager.GET_INTENT_FILTERS);

ComponentName componentName = null;

for (int i = 0; i < resolveInfoList.size(); i++) {

if (TextUtils.equals(

resolveInfoList.get(i).activityInfo.packageName,

YouNeedAppPackageName)) {

componentName = new ComponentName(

resolveInfoList.get(i).activityInfo.packageName,

resolveInfoList.get(i).activityInfo.name);

break;

}

}

// 已安装**

if (null != componentName) {

shareIntent.setComponent(componentName);

mContext.startActivity(shareIntent);

} else {

ContextUtil.getInstance().showToastMsg("请先安装**");

}

} catch (Exception e) {

ContextUtil.getInstance().showToastMsg("分享图片到**失败");

}

}

参考的文章如下：

android设置应用程序默认值

Android中有时打开一个文件,系统会弹出一个应用程序选择列表供你选择.如果你把某个应用程序设为默认值,则不会弹出选择框,而会直接调用该程序.

设置方法如下:

PackageManager pm = getPackageManager();

IntentFilterfilter = new IntentFilter();

filter.addCategory("android.intent.category.DEFAULT");

ComponentName component = newComponentName("YourClearAppPakageName","YourClearAppClassName");

ComponentName[] components = new ComponentName[]{new ComponentName("YourPreferAppPakageName","YourPreferAppClassName"), component};

pm.clearPackagePreferredActivities("YourClearAppPakageName");

pm.addPreferredActivity(filter,IntentFilter.MATCH_CATEGORY_EMPTY, components, component);

列入修改系统默认Launhcer但不是唯一的Launcher

PackageManager pm = getPackageManager();

IntentFilter filter = new IntentFilter();

filter.addAction("android.intent.action.MAIN");

filter.addCategory("android.intent.category.HOME");

filter.addCategory("android.intent.category.DEFAULT");

Context context = getApplicationContext();

ComponentName component = new ComponentName(context.getPackageName(), TestReplaceHomeAppActivity.class.getName()); ComponentName[] components = new ComponentName[] {new ComponentName("com.android.launcher", "com.android.launcher.Launcher"), component};

pm.clearPackagePreferredActivities("com.android.launcher"); pm.addPreferredActivity(filter, IntentFilter.MATCH_CATEGORY_EMPTY, components, component);

修改默认浏览器

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("");

intent.setDataAndType(uri, null);

//找出手机当前安装的所有浏览器程序

List resolveInfoList = packageManager

.queryIntentActivities(intent,

PackageManager.GET_INTENT_FILTERS);

int size = resolveInfoList.size();

ComponentName[] arrayOfComponentName = newComponentName[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 = newComponentName(packageName,

className);

arrayOfComponentName[i] = componentName;

}

packageManager.addPreferredActivity(filter,

IntentFilter.MATCH_CATEGORY_SCHEME,arrayOfComponentName,

component);

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