Android 开发之获取手机中所有App

效果图

代码

1. 添加依赖

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

2. 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;
    }
}

3. 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;
    }

}

4. 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);
    }
}

5. 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

1. 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>