Android 如何实现本地图片直接分享到微信、来往、QQ等，直接分享图片到指定应用

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<ResolveInfo> 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("http://");

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);