AboutActivity.java

package com.wyp.materialqqlite.ui;

import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.v4.view.ViewCompat;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.wyp.materialqqlite.AbsActivity;
import com.wyp.materialqqlite.R;

public class AboutActivity extends AbsActivity {

    private ListView aboutlist;

    private TextView tv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_about);

    }

    @Override
    public void setUpViews() {
        ViewCompat.setElevation(mToolbar, getResources().getDimension(R.dimen.toolbar_elevation));

        aboutlist = (ListView) findViewById(R.id.about_list);

        tv = (TextView) findViewById(R.id.appname_version);
        tv.setText(getString(R.string.app_name)+" "+getVersionName());

        AboutAdapter adapter = new AboutAdapter(this);
        aboutlist.setAdapter(adapter);
        aboutlist.setOnItemClickListener(new AdapterView.OnItemClickListener() { //为每一个item设置相应的响应

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {
                switch(position){
                    case 0:
                        startActivity(ReadmeActivity.class);
                        break;
                    case 1:
                        startActivity(OpensourceActivity.class);
                        break;
                    case 2:
                        startActivity(DeveloperActivity.class);
                        break;
                    case 3:
                        Toast.makeText(AboutActivity.this, "崩溃日志在MaterialQQLite/目录下，请将crash开头的文件发给开发者以解决。", Toast.LENGTH_LONG).show();
                        break;

                }
            }
        });

    }

    private void startActivity(Class<?>cls){
        Intent intent = new Intent(this, cls);
        this.startActivity(intent);
    }


    private String getVersionName() {
        try {
            // 获取packagemanager的实例
            PackageManager packageManager = getPackageManager();
            // getPackageName()是你当前类的包名，0代表是获取版本信息
            PackageInfo packInfo = null;

            packInfo = packageManager.getPackageInfo(getPackageName(), 0);
            String version = packInfo.versionName;
            return version;
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
            return null;
        }
    }


}