安卓Andriod使用入门(十七)【卡片视图的形式管理Activity】

人生最终的价值在于觉悟和思考的能力，而不只是在于生存。——亚里士多德

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MainActivity.java代码:

package siso.aswitcher;

import android.app.Activity;
import android.app.Application;
import android.content.Intent;
import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;

import siso.aslibrary.ActivitySwitcher;

public class MainActivity extends AppCompatActivity {

    static int index;
    static int totalCount = 8;
    static int[] bgColors = new int[] {
            Color.parseColor("#92c8d0"),
            Color.parseColor("#c4dcce"),
            Color.parseColor("#cd7b91"),
            Color.parseColor("#e5c5dc"),
            Color.parseColor("#742a8d"),
            Color.parseColor("#2eb2d8"),
            Color.parseColor("#b9d84e"),
            Color.parseColor("#35fe62")
    };

    private RelativeLayout relativeLayout;
    private Button btnNext;
    private TextView tvPage;

    private ActivitySwitcher activitySwitcher;
    private int tag;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        activitySwitcher = ActivitySwitcher.getInstance();


        relativeLayout = (RelativeLayout) findViewById(R.id.relayout);
        btnNext = (Button) findViewById(R.id.btn_next);
        tvPage = (TextView) findViewById(R.id.tv_page);

        relativeLayout.setBackgroundColor(bgColors[index]);
        tag = index;
        tvPage.setText("当前第" + (tag + 1) + "页" );

        if (index == totalCount - 1) {
            btnNext.setText("退出程序");
        }
        btnNext.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (++index > totalCount - 1) {
                    activitySwitcher.exit();
                } else {
                    startActivity(new Intent(MainActivity.this, MainActivity.class));
                }
            }
        });

        activitySwitcher.setOnActivitySwitchListener(new ActivitySwitcher.OnActivitySwitchListener() {
            @Override
            public void onSwitchStarted() {}

            @Override
            public void onSwitchFinished(Activity activity) {
                if (activity instanceof MainActivity) {
                    MainActivity mainActivity = (MainActivity) activity;
                    MainActivity.index = mainActivity.getTag();
                }
            }
        });

    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        activitySwitcher.processTouchEvent(ev);
        return super.dispatchTouchEvent(ev);
    }

    @Override
    public void onBackPressed() {
        MainActivity.index = tag - 1 <= 0 ? 0 : tag - 1;
        activitySwitcher.finishSwitch(this);
    }

    public int getTag() {
        return tag;
    }
}

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MyApplication.java代码:

package siso.aswitcher;

import android.app.Application;
import siso.aslibrary.ActivitySwitcher;

public class MyApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        ActivitySwitcher.getInstance().init(this);
    }
}

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AndroidManifest.xml内容:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="siso.aswitcher">

    <application
        android:name=".MyApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

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Andriod 库项目结构:

项目运行结果如图:

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