Android开发本地及网络Mp3音乐播放器(二)SplashActivity(欢迎界面)

SplashActivity(欢迎界面)

实现功能：

修改背景图片

通过java修改欢迎界面文字信息

在xml中增加文字阴影

实现6秒自动跳转到MainActivity

实现点击Button跳转到MainActivity

以上2种跳转方法不冲突

(以上2种跳转方法不冲突，

也可以单独看这里 ，

通过按钮跳过SplashActivity(启动画面)，延时自动跳过SplashActivity进入MainActivity
，

http://blog.csdn.net/iwanghang/article/details/51164595)



SplashActivity.java 如下：

package com.iwanghang.drmplayer;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.os.Message;
import android.os.Bundle;
import android.os.Handler;
import android.text.Html;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.TextView;

/**
* An example full-screen activity that shows and hides the system UI (i.e.
* status bar and navigation/system bar) with user interaction.
*/

//public class SplashActivity extends AppCompatActivity {
public class SplashActivity extends Activity {

private static final int START_ACTIVITY = 0x1;
private boolean InMainActivity = false;//布尔值标记是否已经进入MainActivity

/**
* Whether or not the system UI should be auto-hidden after
* {@link #AUTO_HIDE_DELAY_MILLIS} milliseconds.
*/
private static final boolean AUTO_HIDE = true;

/**
* If {@link #AUTO_HIDE} is set, the number of milliseconds to wait after
* user interaction before hiding the system UI.
*/
private static final int AUTO_HIDE_DELAY_MILLIS = 3000;

/**
* Some older devices needs a small delay between UI widget updates
* and a change of the status and navigation bar.
*/
private static final int UI_ANIMATION_DELAY = 300;
private final Handler mHideHandler = new Handler();
private View mContentView;
private final Runnable mHidePart2Runnable = new Runnable() {
@SuppressLint("InlinedApi")
@Override
public void run() {
// Delayed removal of status and navigation bar

// Note that some of these constants are new as of API 16 (Jelly Bean)
// and API 19 (KitKat). It is safe to use them, as they are inlined
// at compile-time and do nothing on earlier devices.
mContentView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
}
};
//    private View mControlsView;
//    private final Runnable mShowPart2Runnable = new Runnable() {
//        @Override
//        public void run() {
//            // Delayed display of UI elements
//            ActionBar actionBar = getSupportActionBar();
//            if (actionBar != null) {
//                actionBar.show();
//            }
//            mControlsView.setVisibility(View.VISIBLE);
//        }
//    };
//    private boolean mVisible;
//    private final Runnable mHideRunnable = new Runnable() {
//        @Override
//        public void run() {
//            hide();
//        }
//    };
/**
* Touch listener to use for in-layout UI controls to delay hiding the
* system UI. This is to prevent the jarring behavior of controls going away
* while interacting with activity UI.
*/
//    private final View.OnTouchListener mDelayHideTouchListener = new View.OnTouchListener() {
//        @Override
//        public boolean onTouch(View view, MotionEvent motionEvent) {
//            if (AUTO_HIDE) {
//                delayedHide(AUTO_HIDE_DELAY_MILLIS);
//            }
//            return false;
//        }
//    };

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

//在SplashActivity中：
//隐藏标题栏即应用程序的名字
requestWindowFeature(Window.FEATURE_NO_TITLE);
//隐藏状态栏：电池状况，信号等
//getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
//设置显示View对象；
//setContentView(R.layout.activity_splash);
setContentView(R.layout.activity_splash);

//        mVisible = true;
//        mControlsView = findViewById(R.id.fullscreen_content_controls);
//        mContentView = findViewById(R.id.fullscreen_content);

// Set up the user interaction to manually show or hide the system UI.
//        mContentView.setOnClickListener(new View.OnClickListener() {
//            @Override
//            public void onClick(View view) {
//                toggle();
//            }
//        });

// Upon interacting with UI controls, delay any scheduled hide()
// operations to prevent the jarring behavior of controls going away
// while interacting with the UI.

//findViewById(R.id.dummy_button).setOnTouchListener(mDelayHideTouchListener);
//        findViewById(R.id.InMainActivity_button).setOnTouchListener(mDelayHideTouchListener);

//字体设置
TextView tv = (TextView)findViewById(R.id.fullscreen_content);
//AssetManager mgr = getAssets();//得到AssetManager
//Typeface tf = Typeface.createFromAsset(mgr, "fonts/mini.TTF");//根据路径得到Typeface
//tv.setTypeface(tf);//设置字体
String textStr1 = "<font color=\"#ffff00\">欢迎来到，</font><br>";
String textStr2 = "<font color=\"#00ff00\">音乐之声，</font><br>";
String textStr3 = "<font color=\"#ff00ff\">乘着梦想，</font><br>";
String textStr4 = "<font color=\"#00ffff\">飞向那个音符<br>的<br>海洋……</font><br>";
tv.setText(Html.fromHtml(textStr1+textStr2+textStr3+textStr4));
//在xml设置阴影
//android:shadowColor="#000000"
//android:shadowDx="15.0"
//android:shadowDy="5.0"
//android:shadowRadius=“5.0"

//通过button进入MainActivity
Button button = (Button) findViewById(R.id.InMainActivity_button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
InMainActivity = true;
startActivity(new Intent(SplashActivity.this,MainActivity.class));
finish();
}
});

//延时自动进入MainActivity
handler.sendEmptyMessageDelayed(START_ACTIVITY,6000);

}

//延时自动进入MainActivity
private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
System.out.println("SplashActivity.java : InMainActivity = " + InMainActivity);
//如果InMainActivity == false，则进入MainActivity，为了避免重复进入MainActivity
if (InMainActivity == false) {
super.handleMessage(msg);
switch (msg.what) {
case START_ACTIVITY:
startActivity(new Intent(SplashActivity.this, MainActivity.class));
finish();
break;
}
}
}
};

//    @Override
//    protected void onPostCreate(Bundle savedInstanceState) {
//        super.onPostCreate(savedInstanceState);
//
//        // Trigger the initial hide() shortly after the activity has been
//        // created, to briefly hint to the user that UI controls
//        // are available.
//        delayedHide(100);
//    }

//    private void toggle() {
//        if (mVisible) {
//            hide();
//        } else {
//            show();
//        }
//    }

//    private void hide() {
//        // Hide UI first
//        ActionBar actionBar = getSupportActionBar();
//        if (actionBar != null) {
//            actionBar.hide();
//        }
//        mControlsView.setVisibility(View.GONE);
//        mVisible = false;
//
//        // Schedule a runnable to remove the status and navigation bar after a delay
//        mHideHandler.removeCallbacks(mShowPart2Runnable);
//        mHideHandler.postDelayed(mHidePart2Runnable, UI_ANIMATION_DELAY);
//    }

//    @SuppressLint("InlinedApi")
//    private void show() {
//        // Show the system bar
//        mContentView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
//                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
//        mVisible = true;
//
//        // Schedule a runnable to display UI elements after a delay
//        mHideHandler.removeCallbacks(mHidePart2Runnable);
//        mHideHandler.postDelayed(mShowPart2Runnable, UI_ANIMATION_DELAY);
//    }

/**
* Schedules a call to hide() in [delay] milliseconds, canceling any
* previously scheduled calls.
*/
//    private void delayedHide(int delayMillis) {
//        mHideHandler.removeCallbacks(mHideRunnable);
//        mHideHandler.postDelayed(mHideRunnable, delayMillis);
//    }
}

activity_splash.xml 如下：

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#0099cc"
tools:context="com.iwanghang.drmplayer.SplashActivity"
>

<!-- The primary full-screen view. This can be replaced with whatever view
is needed to present your content, e.g. VideoView, SurfaceView,
TextureView, etc. -->
<TextView
android:id="@+id/fullscreen_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:keepScreenOn="true"
android:text="@string/dummy_content"
android:textColor="#33b5e5"
android:background="@mipmap/app_splash_bg"

android:textSize="50sp"
android:textStyle="bold"

android:shadowColor="#000000"
android:shadowDx="15.0"
android:shadowDy="5.0"
android:shadowRadius="5.0"
/>

<!-- This FrameLayout insets its children based on system windows using
android:fitsSystemWindows. -->
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">

<LinearLayout
android:id="@+id/fullscreen_content_controls"
style="?metaButtonBarStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:background="@color/black_overlay"
android:orientation="horizontal"
tools:ignore="UselessParent">

<Button
android:id="@+id/InMainActivity_button"
style="?metaButtonBarButtonStyle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/dummy_button"
android:textColor="@color/colorAccent"/>

</LinearLayout>
</FrameLayout>

</FrameLayout><span id="transmark"></span>