切换按钮执行隐藏启动画面

Question

我正在使用 Switch button（如果开关按钮处于禁用状态 splash，否则工作正常）用于禁用 splash 屏幕。但我做不到。我正在尝试 android-activity-alias 但我没有获得任何成功。请帮我。（我也在使用 Android-Studio 2.3.0）。这是我的

代码

This is my Switch Button layout

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:background="@drawable/bg">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="60dp"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textColor="@color/white"
        android:text="@string/switchButtonSplash"/>

    <LinearLayout
        android:layout_width="150dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="5dp"
        android:gravity="fill"
        android:orientation="horizontal">

        <Switch
            android:id="@+id/switch1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="20dp"
            android:layout_marginTop="5dp"
            android:gravity="center"
            android:text="" />

    </LinearLayout>

    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:layout_marginBottom="5dp"
        android:layout_marginTop="5dp"
        android:background="@android:color/darker_gray"/>

</LinearLayout>

</ScrollView>

My Switch Button

This is my Switch Button programming

package ahmer.afzal.myproject;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.widget.CompoundButton;
import android.widget.Switch;

public class SettingsActivity extends AppCompatActivity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    Switch toggle = (Switch) findViewById(R.id.switch1);
    toggle.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener()
    {
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
        {
            if (isChecked)
            {
                startActivity(new Intent(SettingsActivity.this, MainActivity.class));
                finish();
            }
            else
                {
                    startActivity(new Intent(SettingsActivity.this, SplashActivity.class));
                    finish();
                }
        }
    });
    setContentView(R.layout.setting_app_bar_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    if (getSupportActionBar() != null)
    {
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
    }
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
    if (item.getItemId() == android.R.id.home)
    {
        finish();
    }
    return super.onOptionsItemSelected(item);
}
}

Manifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="ahmer.afzal.myproject"
android:versionCode="550"
android:versionName="19.00">

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_SETTINGS"/>
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>

<application
    android:exported="true"
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:screenOrientation="portrait"
    android:theme="@style/AppTheme">
    <activity
        android:name=".SplashActivity"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".MainActivity"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar">
    </activity>
</application>
</manifest>

Answer 1

你不能根据上次打开应用时切换按钮的状态来决定，因为切换按钮不会保留其状态，你必须在用户更改时将其保存在某个地方。

在这种情况下，您可以将切换按钮的状态保存在启动器的 sharedPreferences 和 onCreate() 中 activity 检查该状态并做出相应的决定。但在这种情况下，如果您的启动器 activity 是 Splash，那么在您进行这些检查之前，它将至少显示一次，持续几分之一秒。

P.S：您无法更改清单中声明的启动器 activity。

Answer 2

首先我创建了新的 LauncherActivity 并删除了之前创建的 SettingsActivity

LauncherActivity

package="ahmer.afzal.myproject"

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;

public class LauncherActivity extends Activity
{
    public static String TRANSPARENT = "transparent";
    private SharedPreferences sharedPref;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        sharedPref = getSharedPreferences("myPrefs", Context.MODE_PRIVATE);
        if(!sharedPref.getBoolean(TRANSPARENT, false))
        {
            startActivity(new Intent(LauncherActivity.this, SplashActivity.class));
        }
        else
            {
                startActivity(new Intent(LauncherActivity.this, MainActivity.class));
            }
            finish();
    }
}

Manifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="ahmer.afzal.myproject"
android:versionCode="550"
android:versionName="19.00">

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_SETTINGS"/>
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>

<application
    android:exported="true"
    android:noHistory="true"
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:screenOrientation="portrait"
    android:theme="@style/AppTheme">
    <activity
        android:name=".LauncherActivity"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".MainActivity"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar">
    </activity>
    <activity
        android:name=".SplashActivity"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar">
    </activity>
</application>
</manifest>

切换按钮执行隐藏启动画面

Switch button perform hide splash screen

android

splash-screen

android-studio

android-switch

android-sharedpreferences