记录一些常用的Intent调用

打开相册并获取图片的路径

    //打开相册
    Intent picture = new Intent(
            Intent.ACTION_PICK,
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    if (picture.resolveActivity(this.getPackageManager()) != null) {
        startActivityForResult(picture, 1);
    } else {
        showToast("无可用相册");
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == RESULT_OK) {
            path = readFilePath(data);
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

    private String readFilePath(Intent data) {
        Uri selectedImage = data.getData();
        String[] filePathColumn = {MediaStore.Images.Media.DATA};

        Cursor cursor = getContentResolver().query(selectedImage,
                filePathColumn, null, null, null);
        if (cursor != null && cursor.moveToFirst()) {
            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            String picturePath = cursor.getString(columnIndex);
            cursor.close();
            return picturePath;
        }
        return "";
    }

打开相机

需要权限：android.permission.WRITE_EXTERNAL_STORAGE

    private String mCurrentPhotoPath;
    private File createImageFile() throws IOException {
        // Create an image file name
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.CHINA).format(new Date());
        String imageFileName = "JPEG_" + timeStamp + "_";
        File storageDir = Environment.getExternalStoragePublicDirectory(
                Environment.DIRECTORY_PICTURES);
        File image = File.createTempFile(
                imageFileName,  /* prefix */
                ".jpg",         /* suffix */
                storageDir      /* directory */
        );
        // Save a file: path for use with ACTION_VIEW intents
        mCurrentPhotoPath = image.getAbsolutePath();
        return image;
    }

    public void startCamera(int requestCode, @NonNull File file) {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        if (takePictureIntent.resolveActivity(getActivity().getPackageManager()) != null) {
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
                    Uri.fromFile(file));
            startActivityForResult(takePictureIntent, requestCode);
        } else {
            showToast("无可用相机");
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == RESULT_OK) {
            //此时mCurrentPhotoPath所对应的图片已生成
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

裁剪图片

    private void doCrop(Uri uri) {
        Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setDataAndType(uri, "image/*");
        // 设置裁剪
        intent.putExtra("crop", "true");
        // aspectX aspectY 是宽高的比例
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        // outputX outputY 是裁剪图片宽高
        intent.putExtra("outputX", 320);
        intent.putExtra("outputY", 320);
        intent.putExtra("scale", true);
        intent.putExtra("return-data", true);
        startActivityForResult(intent, CROP_FROM_CAMERA);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == RESULT_OK && requestCode == CROP_FROM_CAMERA) {
             if (null != data)
                setCropImg(data);
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

    private void setCropImg(Intent picdata) {
        Bundle bundle = picdata.getExtras();
        if (null != bundle) {
            Bitmap mBitmap = bundle.getParcelable("data");
            //获取到bitmap图片
        }
    }

分享功能

    /** 
     * 分享功能 
     *  
     * @param context 
     *            上下文 
     * @param activityTitle 
     *            Activity的名字 
     * @param msgTitle 
     *            消息标题 
     * @param msgText 
     *            消息内容 
     * @param imgPath 
     *            图片路径，不分享图片则传null 
     */  
    public void shareMsg(String activityTitle, String msgTitle, String msgText,  
            String imgPath) {  
        Intent intent = new Intent(Intent.ACTION_SEND);  
        if (imgPath == null || imgPath.equals("")) {  
            intent.setType("text/plain"); // 纯文本  
        } else {  
            File f = new File(imgPath);  
            if (f != null && f.exists() && f.isFile()) {  
                intent.setType("image/jpg");  
                Uri u = Uri.fromFile(f);  
                intent.putExtra(Intent.EXTRA_STREAM, u);  
            }  
        }  
        intent.putExtra(Intent.EXTRA_SUBJECT, msgTitle);  
        intent.putExtra(Intent.EXTRA_TEXT, msgText);  
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  
        startActivity(Intent.createChooser(intent, activityTitle));  
    }  

拨打电话与启动到拨号页面

    //直接拨打电话，需要权限android.permission.CALL_PHONE，不推荐
    Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:123456");
    //启动到拨号页面
    Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:123456");
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(intent);

打开网页

        Uri uri = Uri.parse("https://www.baidu.com");
        Intent it = new Intent(Intent.ACTION_VIEW,uri);
        startActivity(it);

短信

    //跳转到发送短信页面
    Intent it = new Intent(Intent.ACTION_VIEW); 
    it.putExtra("sms_body", "The SMS text"); 
    it.setType("vnd.android-dir/mms-sms"); 
    startActivity(it);
    //跳转到发送短信页面，并带有号码
    Uri uri = Uri.parse("smsto:123456");
    Intent it = new Intent(Intent.ACTION_SENDTO, uri);
    it.putExtra("sms_body", "The SMS text");
    startActivity(it);

    //直接发送短信，需要的权限
    <uses-permission android:name="android.permission.SEND_SMS"></uses-permission>
    <uses-permission android:name="android.permission.READ_SMS"></uses-permission>
    <uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission>
    //获取短信管理器
    android.telephony.SmsManager smsManager = android.telephony.SmsManager.getDefault();
    //拆分短信内容（手机短信长度限制）
    List<String> divideContents = smsManager.divideMessage("你好吗");
    for (String text : divideContents) {
        smsManager.sendTextMessage("123456", null, text, null, null);
    }

应用市场查找应用

    Uri uri = Uri.parse("market://search?q=pname:com.tencent.mm");
    Intent it = new Intent(Intent.ACTION_VIEW, uri);
    startActivity(it);