android基础知识----自带的分享

我一直都在sharesdk分享，没怎么用，今天这里就用下，顺便记录下挺简单的。

最主要的三种

1. 分享文本

Intent intent1=new Intent(Intent.ACTION_SEND);
intent1.putExtra(Intent.EXTRA_TEXT,"This is my text to send");
intent1.setType("text/plain");
startActivity(Intent.createChooser(intent1,"文本分享"));

分享单张图片

Intent intent2=new Intent(Intent.ACTION_SEND);
Uri uri= Uri.parse(picturePath);
intent2.setType("image/*");
intent2.putExtra(Intent.EXTRA_STREAM,uri);
startActivity(Intent.createChooser(intent2,"单图片分享"));

分享多张图片

ArrayList<Uri> imageUris = new ArrayList<Uri>();
Uri imageUri1 = Uri.parse(picturePath);
Uri imageUri2 = Uri.parse(picturePath);
imageUris.add(imageUri1);
imageUris.add(imageUri2);

Intent intent3 = new Intent();
intent3.setAction(Intent.ACTION_SEND_MULTIPLE);
intent3.putParcelableArrayListExtra(Intent.EXTRA_STREAM, imageUris);
intent3.setType("image/*");
startActivity(Intent.createChooser(intent3, "多图片分享"));

如果你要传文件的话就设置

intent4.setType("*/*");

当然我们还可以设置指向qq或者微信分享

QQ

Intent qqIntent = new Intent(Intent.ACTION_SEND);
qqIntent.setPackage("com.tencent.mobileqq");
qqIntent.setType("text/plain");
qqIntent.putExtra(Intent.EXTRA_TEXT, "分享到微信的内容");
startActivity(qqIntent);

微信

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);

好了，但是这里有个问题，就是如果你没有装微信或者QQ的话，那么你指向分享会报错崩溃，这是不被允许的错误，所以要加上判断。

/**
*判断微信是否可用  true可用
* @param context
* @return
*/
public static boolean isWeixinAvilible(Context context) {
final PackageManager packageManager = context.getPackageManager();// 获取packagemanager
List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);// 获取所有已安装程序的包信息
if (pinfo != null) {
for (int i = 0; i < pinfo.size(); i++) {
String pn = pinfo.get(i).packageName;
if (pn.equals("com.tencent.mm")) {
return true;
}
}
}
return false;
}
/**
* 判断qq是否可用
*
* @param context
* @return
*/
public static boolean isQQClientAvailable(Context context) {
final PackageManager packageManager = context.getPackageManager();
List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);
if (pinfo != null) {
for (int i = 0; i < pinfo.size(); i++) {
String pn = pinfo.get(i).packageName;
if (pn.equals("com.tencent.mobileqq")) {
return true;
}
}
}
return false;
}

然后给出我的测试代码

package com.example.admin.fenxiang;

import android.Manifest;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.annotation.DrawableRes;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;

import static android.os.Environment.getExternalStorageDirectory;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{
private Button btnText;
private Button btnDan;
private Button btnDuo;
private Button btnFile;
private Button btnQq;
private Button btnWexin;
private Button btnTuwen;
private  final int REQUEST_WRITE=1;//申请权限的请求码
private File path;
private Uri file;//存放图片的文件名
String picturePath;//图片路径
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

initView();
}
public void initView(){
btnText = (Button) findViewById(R.id.btn_text);
btnDan = (Button) findViewById(R.id.btn_dan);
btnDuo = (Button) findViewById(R.id.btn_duo);
btnFile = (Button) findViewById(R.id.btn_file);
btnQq = (Button) findViewById(R.id.btn_qq);
btnWexin = (Button) findViewById(R.id.btn_wexin);
btnTuwen = (Button) findViewById(R.id.btn_tuwen);
btnText.setOnClickListener(this);
btnDan.setOnClickListener(this);
btnDuo.setOnClickListener(this);
btnFile.setOnClickListener(this);
btnQq.setOnClickListener(this);
btnWexin.setOnClickListener(this);
btnTuwen.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (view.getId()){
case R.id.btn_text:
Intent intent1=new Intent(Intent.ACTION_SEND);
intent1.putExtra(Intent.EXTRA_TEXT,"This is my text to send");
intent1.setType("text/plain");
startActivity(Intent.createChooser(intent1,"文本分享"));
break;
case R.id.btn_dan:
if (picturePath==null){
Toast.makeText(MainActivity.this,"先获取分享的图片",Toast.LENGTH_SHORT).show();
return;
}
Intent intent2=new Intent(Intent.ACTION_SEND);
Uri uri= Uri.parse(picturePath);
intent2.setType("image/*");
intent2.putExtra(Intent.EXTRA_STREAM,uri);
startActivity(Intent.createChooser(intent2,"单图片分享"));
break;
case R.id.btn_duo:
if (picturePath==null){
Toast.makeText(MainActivity.this,"先获取分享的图片",Toast.LENGTH_SHORT).show();
return;
}
ArrayList<Uri> imageUris = new ArrayList<Uri>();
Uri imageUri1 = Uri.parse(picturePath);
Uri imageUri2 = Uri.parse(picturePath);
imageUris.add(imageUri1);
imageUris.add(imageUri2);

Intent intent3 = new Intent();
intent3.setAction(Intent.ACTION_SEND_MULTIPLE);
intent3.putParcelableArrayListExtra(Intent.EXTRA_STREAM, imageUris);
intent3.setType("image/*");
startActivity(Intent.createChooser(intent3, "多图片分享"));
break;
case R.id.btn_file:
applyPermission();
Intent intent4=new Intent(Intent.ACTION_SEND);
Uri uri4= Uri.parse(path.getAbsolutePath());//  Uri u = Uri.fromFile(f);
intent4.putExtra(Intent.EXTRA_STREAM,uri4);
intent4.setType("*/*");
startActivity(Intent.createChooser(intent4,"单文件分享"));
break;
case R.id.btn_qq:
if (isQQClientAvailable(MainActivity.this)){
Intent qqIntent = new Intent(Intent.ACTION_SEND);
qqIntent.setPackage("com.tencent.mobileqq");
qqIntent.setType("text/plain");
qqIntent.putExtra(Intent.EXTRA_TEXT, "分享到QQ的内容");
startActivity(qqIntent);
}else {
Toast.makeText(MainActivity.this,"手机没有安装QQ",Toast.LENGTH_SHORT).show();
}

break;
case R.id.btn_wexin:
if (isWeixinAvilible(MainActivity.this)){
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);
}else {
Toast.makeText(MainActivity.this,"手机没有安装微信",Toast.LENGTH_SHORT).show();
}

break;
case R.id.btn_tuwen:

Intent intent = new Intent(Intent.ACTION_PICK, null);
intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
"image/*");
startActivityForResult(intent, 1001);
break;
}
}

/**
* res中的图片转变为uri
* @param id
* @return
*/
private String getResourcesUri(@DrawableRes int id) {
Resources resources = getResources();
String uriPath = ContentResolver.SCHEME_ANDROID_RESOURCE + "://" +
resources.getResourcePackageName(id) + "/" +
resources.getResourceTypeName(id) + "/" +
resources.getResourceEntryName(id);
Toast.makeText(this, "Uri:" + uriPath, Toast.LENGTH_SHORT).show();
return uriPath;
}
//写数据
public void writeToSdCard(){
//1、判断sd卡是否可用
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
//sd卡可用
//2、获取sd卡路径
File sdFile= getExternalStorageDirectory();
path=new File(sdFile,"a.txt");//sd卡下面的a.txt文件  参数 前面 是目录 后面是文件
try {
FileOutputStream fileOutputStream=new FileOutputStream(path);
fileOutputStream.write("我要SSR".getBytes());
} catch (Exception e) {
e.printStackTrace();
}
}
}
/*
考虑android6.0的权限问题
*/
public void applyPermission(){
//判断是否6.0以上的手机   不是就不用
if(Build.VERSION.SDK_INT>=23){
//判断是否有这个权限
if(ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)!= PackageManager.PERMISSION_GRANTED){
//2、申请权限: 参数二：权限的数组；参数三：请求码
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},REQUEST_WRITE);
}else {
writeToSdCard();
}
} else{
writeToSdCard();
}
}

//判断授权的方法  授权成功直接调用写入方法  这是监听的回调
//参数  上下文   授权结果的数组   申请授权的数组
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if(requestCode==REQUEST_WRITE&&grantResults[0]== PackageManager.PERMISSION_GRANTED){
writeToSdCard();
}

}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
//
if (resultCode==RESULT_OK){
switch (requestCode) {
case 1001:
//相册选择
if (data != null) {
String[] filePathColumn = { MediaStore.Images.Media.DATA };

Cursor cursor = getContentResolver().query(data.getData(),
filePathColumn, null, null, null);
cursor.moveToFirst();

int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
picturePath = cursor.getString(columnIndex);
cursor.close();
Log.e("====",picturePath);
}
break;

}
}
}

/**
*判断微信是否可用  true可用
* @param context
* @return
*/
public static boolean isWeixinAvilible(Context context) {
final PackageManager packageManager = context.getPackageManager();// 获取packagemanager
List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);// 获取所有已安装程序的包信息
if (pinfo != null) {
for (int i = 0; i < pinfo.size(); i++) {
String pn = pinfo.get(i).packageName;
if (pn.equals("com.tencent.mm")) {
return true;
}
}
}
return false;
}
/**
* 判断qq是否可用
*
* @param context
* @return
*/
public static boolean isQQClientAvailable(Context context) {
final PackageManager packageManager = context.getPackageManager();
List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);
if (pinfo != null) {
for (int i = 0; i < pinfo.size(); i++) {
String pn = pinfo.get(i).packageName;
if (pn.equals("com.tencent.mobileqq")) {
return true;
}
}
}
return false;
}

}

好了，到此为止。。。。。祝大家五一快乐。