android之SQLiteDatabase

public class DatabaseActivity extends AppCompatActivity implements View.OnClickListener {

    private TextView activity_database;
    private String mDatabaseName;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_database);
        activity_database = findViewById(R.id.activity_database);
        findViewById(R.id.bth_insert).setOnClickListener(this);
        findViewById(R.id.bth_delete).setOnClickListener(this);
        //生成一个测试数据库的完整路径
        mDatabaseName = getFilesDir()+"test.db";

    }

    @Override
    public void onClick(View v) {
        String desc=null;
      switch (v.getId()){
          case R.id.bth_insert:
              //创建打开数据库,数据库如果不存在就创建它,如果存在就打开它
              SQLiteDatabase db = openOrCreateDatabase(mDatabaseName, Context.MODE_PRIVATE, null);
               desc=String.format("数据库%s创建%s",db.getPath(),(db!=null)?"成功":"失败");
              activity_database.setText(desc);
              break;

             //删除数据库数据库
          case R.id.bth_delete:
              boolean result = deleteDatabase(mDatabaseName);
              desc=String.format("数据库%s删除%s",mDatabaseName,result?"成功":"失败");
              activity_database.setText(desc);
              break;
      }
    }
}