Android分享功能的实现

文章目录

前言分享方的实现分享文字分享图片分享多图分享到指定平台Java的参考代码

接收方的实现参考文档

前言

如何在安卓应用里提供分享功能，将我们手机中的图片或浏览到的好文章上传到自己的网站？本文整理了一下实现方式。 分享功能分两种情形：

我分享给别人，我的app是分享方别人分享给我, 我的app是接收方

分享的数据类型：图片、文本、链接、普通文件。

分享方的实现

在AndroidManifest.xml申明一个FileProvider:

android:name="android.support.v4.content.FileProvider"

android:authorities="com.codepath.fileprovider"

android:exported="false"

android:grantUriPermissions="true">

android:name="android.support.FILE_PROVIDER_PATHS"

android:resource="@xml/fileprovider" />

创建资源文件：

name="images"

path="Pictures" />

然后：

// getExternalFilesDir() + "/Pictures" should match the declaration in fileprovider.xml paths

val file = File(getExternalFilesDir(Environment.DIRECTORY_PICTURES), "share_image_" + System.currentTimeMillis() + ".png")

// wrap File object into a content provider. NOTE: authority here should match authority in manifest declaration

val bmpUri = FileProvider.getUriForFile(MyActivity.this, "com.codepath.fileprovider", file)

最后：

val intent = Intent().apply {

this.action = Intent.ACTION_SEND

this.putExtra(Intent.EXTRA_STREAM, bmpUri)

this.type = "image/jpeg"

}

startActivity(Intent.createChooser(intent, resources.getText(R.string.send_to)))

分享文字

Intent intent = new Intent();

intent.setAction(Intent.ACTION_SEND);

intent.putExtra(Intent.EXTRA_TEXT, "文本内容");

intent.setType("text/plain");

startActivity(intent);

分享图片

private void shareImage(Bitmap bitmap) {

Intent intent = new Intent();

intent.setAction(Intent.ACTION_SEND);

Uri uri = Uri.parse(MediaStore.Images.Media.insertImage(mActivity.getContentResolver(), bitmap, "IMG" + Calendar.getInstance().getTime(), null));

intent.setType("image/*");

intent.putExtra(Intent.EXTRA_STREAM, uri);

mActivity.startActivity(Intent.createChooser(intent, "title"));

}

分享多图

ArrayList imageUris = new ArrayList<>();

imageUris.add(uri);

imageUris.add(uri);

Intent shareIntent = new Intent();

shareIntent.setAction(Intent.ACTION_SEND_MULTIPLE);

shareIntent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, imageUris);

shareIntent.setType("image/*");

startActivity(Intent.createChooser(shareIntent, "dlgTitle"));

分享到指定平台

Intent wechatIntent = new Intent(Intent.ACTION_SEND);

wechatIntent.setPackage("com.tencent.mm");

wechatIntent.setType("text/plain");

wechatIntent.putExtra(Intent.EXTRA_TEXT, "分享到微信的内容");

startActivity(wechatIntent);

Java的参考代码

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.drawable.BitmapDrawable;

import android.net.Uri;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import androidx.core.content.FileProvider;

import java.io.File;

import java.io.FileOutputStream;

public class MainActivity extends AppCompatActivity {

Button share;

ImageView imageView;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

share = findViewById(R.id.share);

imageView = findViewById(R.id.shareimage);

// initialising text field where we will enter data

share.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// Now share image function will be called

// here we will be passing the text to share

// Getting drawable value from image

BitmapDrawable bitmapDrawable = (BitmapDrawable) imageView.getDrawable();

Bitmap bitmap = bitmapDrawable.getBitmap();

shareImageandText(bitmap);

}

});

}

private void shareImageandText(Bitmap bitmap) {

Uri uri = getmageToShare(bitmap);

Intent intent = new Intent(Intent.ACTION_SEND);

// putting uri of image to be shared

intent.putExtra(Intent.EXTRA_STREAM, uri);

// adding text to share

intent.putExtra(Intent.EXTRA_TEXT, "Sharing Image");

// Add subject Here

intent.putExtra(Intent.EXTRA_SUBJECT, "Subject Here");

// setting type to image

intent.setType("image/png");

// calling startactivity() to share

startActivity(Intent.createChooser(intent, "Share Via"));

}

// Retrieving the url to share

private Uri getmageToShare(Bitmap bitmap) {

File imagefolder = new File(getCacheDir(), "images");

Uri uri = null;

try {

imagefolder.mkdirs();

File file = new File(imagefolder, "shared_image.png");

FileOutputStream outputStream = new FileOutputStream(file);

bitmap.compress(Bitmap.CompressFormat.PNG, 90, outputStream);

outputStream.flush();

outputStream.close();

uri = FileProvider.getUriForFile(this, "com.anni.shareimage.fileprovider", file);

} catch (Exception e) {

Toast.makeText(this, "" + e.getMessage(), Toast.LENGTH_LONG).show();

}

return uri;

}

}

接收方的实现

当另一个应用尝试通过构建 intent 并将它传递给 startActivity() 来共享任何这些内容时，你的应用都将在 Android Sharesheet 或 intent 解析器中列为一个选项。如果用户选择您的应用，相应的Activity将会启动。然后，您需要在自己的代码和界面中妥当处理相关内容。 首先，定义你的Activity：

在MyActivity中处理传入的内容:

override fun onCreate(savedInstanceState: Bundle?) {

...

when {

intent?.action == Intent.ACTION_SEND -> {

if ("text/plain" == intent.type) {

handleSendText(intent) // Handle text being sent

} else if (intent.type?.startsWith("image/") == true) {

handleSendImage(intent) // Handle single image being sent

}

}

intent?.action == Intent.ACTION_SEND_MULTIPLE

&& intent.type?.startsWith("image/") == true -> {

handleSendMultipleImages(intent) // Handle multiple images being sent

}

else -> {

// Handle other intents, such as being started from the home screen

}

}

...

}

private fun handleSendText(intent: Intent) {

intent.getStringExtra(Intent.EXTRA_TEXT)?.let {

// Update UI to reflect text being shared

}

}

private fun handleSendImage(intent: Intent) {

(intent.getParcelableExtra(Intent.EXTRA_STREAM) as? Uri)?.let {

// Update UI to reflect image being shared

}

}

private fun handleSendMultipleImages(intent: Intent) {

intent.getParcelableArrayListExtra(Intent.EXTRA_STREAM)?.let {

// Update UI to reflect multiple images being shared

}

}

参考文档

https://developer.android.com/training/sharing/receive?hl=zh-cnhttps://juejin.cn/post/6844904104389509134https://github.com/wangtaoT/receiveShareDemo