Android(安卓)开发之获取手机中所有App

效果图

代码

添加依赖

implementation 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.30'implementation 'androidx.recyclerview:recyclerview:1.1.0'

AppInfo.java

import android.graphics.drawable.Drawable;/** * created on 2020/8/3 20:22 * * @author Scarf Gong */public class AppInfo {    private Drawable image;    private String appName;    private String packageName;    public AppInfo() {    }    public Drawable getImage() {        return image;    }    public void setImage(Drawable image) {        this.image = image;    }    public String getAppName() {        return appName;    }    public void setAppName(String appName) {        this.appName = appName;    }    public String getPackageName() {        return packageName;    }    public void setPackageName(String packageName) {        this.packageName = packageName;    }}

AppUtils.java

/** * created on 2020/8/3 20:24 * * @author Scarf Gong */public class AppUtils {    private static final String TAG = "AppUtils";    public static List<AppInfo> scanLocalInstallAppList(PackageManager packageManager) {        List myAppInfos = new ArrayList();        try {            List packageInfos = packageManager.getInstalledPackages(0);            for (int i = 0; i < packageInfos.size(); i++) {                PackageInfo packageInfo = (PackageInfo) packageInfos.get(i);                //过滤掉系统app                if ((ApplicationInfo.FLAG_SYSTEM & packageInfo.applicationInfo.flags) != 0) {                    continue;                }                AppInfo myAppInfo = new AppInfo();                String appName = packageInfo.applicationInfo.loadLabel(packageManager).toString();                myAppInfo.setAppName(appName);                myAppInfo.setPackageName(packageInfo.packageName);                if (packageInfo.applicationInfo.loadIcon(packageManager) == null) {                    continue;                }                myAppInfo.setImage(packageInfo.applicationInfo.loadIcon(packageManager));                myAppInfos.add(myAppInfo);            }        } catch (Exception e) {            Log.e(TAG, "获取应用包信息失败");        }        return myAppInfos;    }}

AppAdapter.java

/** * created on 2020/8/3 20:26 * * @author Scarf Gong */public class AppAdapter extends BaseQuickAdapter<AppInfo, BaseViewHolder> {    public AppAdapter(int layoutResId, @Nullable List<AppInfo> data) {        super(layoutResId, data);    }    @Override    protected void convert(BaseViewHolder helper, AppInfo item) {        helper.setImageDrawable(R.id.iv_img,item.getImage());        helper.setText(R.id.tv_name,item.getAppName());        helper.addOnClickListener(R.id.ll_layout);    }}

MainActivity.java

public class MainActivity extends AppCompatActivity {    private RecyclerView mRecyclerView;    private AppAdapter mAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();        initAdapter();    }    private void initView() {        mRecyclerView = findViewById(R.id.recyclerView);    }    private void initAdapter() {        final List<AppInfo> appInfos = AppUtils.scanLocalInstallAppList(MainActivity.this.getPackageManager());        mAdapter = new AppAdapter(R.layout.item_app_info,appInfos);        mAdapter.openLoadAnimation();        mAdapter.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() {            @Override            public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {                String packageName = appInfos.get(position).getPackageName();                openApp(packageName);            }        });        mRecyclerView.setLayoutManager(new GridLayoutManager(MainActivity.this,3));        mRecyclerView.setAdapter(mAdapter);    }    private void openApp(String packageName) {        Intent intent = getPackageManager().getLaunchIntentForPackage(packageName);        startActivity(intent);    }}

布局文件

item_app_info.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:id="@+id/ll_layout"    android:layout_width="120dp"    android:layout_height="120dp"    android:layout_gravity="center"    android:gravity="center">    <ImageView        android:id="@+id/iv_img"        android:layout_width="90dp"        android:layout_height="90dp"        android:src="@mipmap/ic_launcher"/>    <TextView        android:id="@+id/tv_name"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textSize="16sp"        android:text="android"        android:textColor="#000"/>LinearLayout>

效果图

代码

布局文件

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