2020-09-17 一倒计时welcome页

1.build.gradle文件配置

applyplugin:'com.android.application'

android{

compileSdkVersion29

buildToolsVersion"29.0.3"

defaultConfig{

applicationId"com.chai.welcome"

minSdkVersion16

targetSdkVersion29

versionCode1

versionName"1.0"

testInstrumentationRunner"androidx.test.runner.AndroidJUnitRunner"

}

buildTypes{

release{

minifyEnabledfalse

proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'),'proguard-rules.pro'

}

//Invoke-customs are only supported starting with Android O (--min-api 26)

compileOptions{

sourceCompatibility JavaVersion.VERSION_1_8

targetCompatibility JavaVersion.VERSION_1_8

}

dependencies{

implementation fileTree(dir:"libs",include: ["*.jar"])

implementation'androidx.appcompat:appcompat:1.2.0'

implementation'com.google.android.material:material:1.2.1'

implementation'androidx.constraintlayout:constraintlayout:2.0.1'

implementation'androidx.navigation:navigation-fragment:2.3.0'

implementation'androidx.navigation:navigation-ui:2.3.0'

testImplementation'junit:junit:4.13'

androidTestImplementation'androidx.test.ext:junit:1.1.2'

androidTestImplementation'androidx.test.espresso:espresso-core:3.3.0'

//网络请求库

implementation'com.squareup.retrofit2:retrofit:2.9.0'

implementation'com.squareup.retrofit2:retrofit-converters:2.8.1'

implementation'com.squareup.retrofit2:converter-gson:2.9.0'

implementation'com.squareup.okhttp3:logging-interceptor:4.8.1'

implementation'com.squareup.retrofit2:adapter-rxjava2:2.9.0'

//函数响应式生命周期库

implementation'com.trello.rxlifecycle2:rxlifecycle:2.2.2'

implementation'com.trello.rxlifecycle2:rxlifecycle-components:2.2.2'

//多标签

//日志库

implementation'com.orhanobut:logger:2.2.0'

//view数据绑定

implementation'com.jakewharton:butterknife:10.2.3'

annotationProcessor'com.jakewharton:butterknife-compiler:10.2.3'

//加载图片

implementation'com.github.bumptech.glide:glide:4.11.0'

//导航栏

implementation'com.android.support:design:29.+'

//数据库

implementation'org.xutils:xutils:3.9.0'

//事件发布-订阅总线

implementation'org.greenrobot:eventbus:3.1.1'

}

2.BaseActivity.java

public abstract class BaseActivityextends RxAppCompatActivity {

public static final int MATCH_PARENT = LinearLayout.LayoutParams.MATCH_PARENT;

public static final int WRAP_CONTENT = LinearLayout.LayoutParams.WRAP_CONTENT;

public static int displayWidth =0;

public static int displayHeight =0;

public static float density =0;

public Contextcontext;

@Override

protected void onCreate(@Nullable Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

density = getResources().getDisplayMetrics().density;

context =this;

DisplayMetrics displayMetrics = getResources().getDisplayMetrics();

displayWidth = displayMetrics.widthPixels;

displayHeight = displayMetrics.heightPixels;

}

public Drawable getMyDrawable(@DrawableRes int id) {

return ContextCompat.getDrawable(context, id);

}

public int getMyColor(@ColorRes int id) {

return ContextCompat.getColor(context, id);

}

public RequestBody createRequestBody(List> list){

return FormBody.create(new Gson().toJson(list),

MediaType.parse("application/json; charset=utf-8"));

}

public RequestBody createRequestBody(Map paramMap){

return FormBody.create(new Gson().toJson(paramMap),

MediaType.parse("application/json; charset=utf-8"));

}

public void toSubscribeSingleOb(Observable ob) {

ob.subscribeOn(Schedulers.io())

.observeOn(AndroidSchedulers.mainThread())

.compose(this.bindUntilEvent(ActivityEvent.DESTROY));

}

//android点击屏幕上EditText区域以外的任何地方隐藏键盘的方法

public Boolean hideInputMethod(Context context, View v) {

InputMethodManager imm = (InputMethodManager) context

.getSystemService(Context.INPUT_METHOD_SERVICE);

if (imm !=null) {

return imm.hideSoftInputFromWindow(v.getWindowToken(),0);

}

return false;

}

//判断当前点击屏幕的地方是否是软键盘：

public boolean isShouldHideInput(View v, MotionEvent event) {

if (v !=null && (vinstanceof EditText)) {

int[] leftTop = {0,0 };

v.getLocationInWindow(leftTop);

int left = leftTop[0], top = leftTop[1], bottom = top + v.getHeight(), right = left

+ v.getWidth();

if (event.getX() > left && event.getX() < right

&& event.getY() > top && event.getY() < bottom) {

// 保留点击EditText的事件

return false;

}else {

return true;

}

return false;

}

//覆写activity的点击事件的分发方法dispatchTouchEvent：

@Override

public boolean dispatchTouchEvent(MotionEvent ev) {

if (ev.getAction() == MotionEvent.ACTION_DOWN) {

View v = getCurrentFocus();

if (isShouldHideInput(v, ev)) {

if(hideInputMethod(this, v)) {

return true;//隐藏键盘时，其他控件不响应点击事件==》注释则不拦截点击事件

}

return super.dispatchTouchEvent(ev);

}

3.新建WelcomeActivity.java

public class WelcomeActivityextends BaseActivity {

@BindView(R.id.tv_tips)

TextViewtv_tips;

public static int COUNT =3;

public Handlerhandler =new Handler(){

@Override

public void handleMessage(@NonNull Message msg) {

super.handleMessage(msg);

switch (msg.what){

case 0x01:

tv_tips.setText(COUNT+"S后跳转");

break;

}

};

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

requestWindowFeature(Window.FEATURE_NO_TITLE);

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,

WindowManager.LayoutParams.FLAG_FULLSCREEN);

setContentView(R.layout.activity_welcome);

ButterKnife.bind(this);

//开始倒计时

startCountdown();

}

//开始倒计时

private void startCountdown(){

COUNT =3;

final Timer timer =new Timer();

timer.schedule(new TimerTask() {

@Override

public void run() {

if(COUNT >0){

Message message = Message.obtain();

message.what =0x01;

handler.sendMessage(message);

}else {

Intent intent =new Intent();

intent.setClass(WelcomeActivity.this, MainActivity.class);

startActivity(intent);

finish();

timer.cancel();

}

COUNT--;

}

},2000,1000);

}

4.新建activity_welcome.xml布局文件

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="@mipmap/welcome">

<TextView

android:id="@+id/tv_tips"

android:layout_width="wrap_content"

android:layout_height="@dimen/dp_20"

android:layout_alignParentRight="true"

android:layout_margin="@dimen/dp_15"

android:paddingLeft="@dimen/dp_5"

android:paddingRight="@dimen/dp_5"

android:text="3S后跳转"

android:textColor="@color/_white" />

</RelativeLayout>

5.配置 AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.chai.welcome">

<application

android:allowBackup="true"

android:icon="@mipmap/ic_launcher"

android:label="@string/app_name"

android:roundIcon="@mipmap/ic_launcher_round"

android:supportsRtl="true"

android:theme="@style/Theme.AppCompat.Light.NoActionBar">

<!--有的手机进行http请求时会将http转为https请求，此处可以禁止转换

并且需要在application中添加android:usesCleartextTraffic = "true"

-->

<uses-library android:name="org.apache.http.legacy" android:required="false"/>

<activity android:name=".ui.WelcomeActivity"

android:screenOrientation="portrait">

<intent-filter>

</intent-filter>

</activity>

<activity android:name=".ui.LoginActivity"

android:screenOrientation="portrait"/>

<activity

android:name=".MainActivity"

android:screenOrientation="portrait">

</activity>

</application>

</manifest>

6.在style.xml 中设置无主题样式

<item name="windowActionBar">false</item>

</style>

7.在color.xml中设置倒计时字体颜色样式

<color name="_white">#FFFFFF</color>

2020-09-17 一 倒计时welcome页

2020-09-17 一倒计时welcome页