android 增加背景文字 水印效果（仿钉钉）

package com.example.nurmemet.watermark;

import android.content.Context;
import android.support.test.InstrumentationRegistry;
import android.support.test.runner.AndroidJUnit4;

import org.junit.Test;
import org.junit.runner.RunWith;

import static org.junit.Assert.*;

/**
 * Instrumentation test which will execute on an Android device.
 *
 * @see Testing documentation
 */
@RunWith（AndroidJUnit4.class）
public class ExampleInstrumentedTest {
    @Test
    public void useAppContext（） throws Exception {
        // Context of the app under test.
        Context appContext = InstrumentationRegistry.getTargetContext（）;

        assertEquals（“com.example.nurmemet.watermark“ appContext.getPackageName（））;
    }
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2017-08-10 04:13  WaterMarkDrawable-master\
     目录           0  2017-08-10 04:13  WaterMarkDrawable-master\.idea\
     文件         686  2017-08-10 04:13  WaterMarkDrawable-master\.idea\compiler.xml
     目录           0  2017-08-10 04:13  WaterMarkDrawable-master\.idea\copyright\
     文件          74  2017-08-10 04:13  WaterMarkDrawable-master\.idea\copyright\profiles_settings.xml
     文件         679  2017-08-10 04:13  WaterMarkDrawable-master\.idea\gradle.xml
     目录           0  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\
     文件         244  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\android_android_24.xml
     文件         244  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\android_android_25.xml
     文件         824  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\animated_vector_drawable_25_0_0.xml
     文件         740  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\appcompat_v7_25_0_0.xml
     文件         796  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\espresso_core_2_2_2.xml
     文件         873  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\espresso_idling_resource_2_2_2.xml
     文件         900  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\exposed_instrumentation_api_publish_0_5.xml
     文件         516  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\hamcrest_core_1_3.xml
     文件         551  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\hamcrest_integration_1_3.xml
     文件         530  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\hamcrest_library_1_3.xml
     文件         511  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\javawriter_2_1_1.xml
     文件         559  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\javax_annotation_api_1_2.xml
     文件         501  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\javax_inject_1.xml
     文件         322  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\jsr305_2_0_1.xml
     文件         467  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\junit_4_12.xml
     文件         690  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\rules_0_5.xml
     文件         697  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\runner_0_5.xml
     文件         507  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\support_annotations_25_0_0.xml
     文件         911  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\support_compat_25_0_0.xml
     文件         919  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\support_core_ui_25_0_0.xml
     文件         943  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\support_core_utils_25_0_0.xml
     文件         927  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\support_fragment_25_0_0.xml
     文件         959  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\support_media_compat_25_0_0.xml
     文件         411  2017-08-10 04:13  WaterMarkDrawable-master\.idea\libraries\support_v4_25_0_0.xml
............此处省略87个文件信息